# Trace: Fix Fight/Bite Mechanics and Targeting for Cards
Agent: claude-code | Model: Claude Opus 4.6 | Project: mage
---
## User
Caveat: The messages below were generated by the user while running local commands. DO NOT respond to these messages or otherwise consider them in your response unless the user explicitly asks you to.
## User
/clear
clear
## User
## User
Read `docs/work-queue.md` and do the next unchecked batch. For each batch:
1. Read the engine files (`mtg-engine/src/abilities.rs`, `mtg-engine/src/game.rs`) to understand current Effect/StaticEffect variants
2. If the batch has a NOTE about uncertainty, investigate first and update the queue with findings before committing the fix
3. If engine work is needed: add the variant, constructor, and match arm, and look for the Java implementation to see the bigger picture
4. Add a test for any new engine effect (follow the pattern in `game.rs` `mod tests`)
5. Fix all cards listed in the batch (grep to find exact lines, fix across all 4 set files)
6. `cargo check -p mtg-cards && cargo test --lib`
7. Update docs: mark cards in `docs/{fdn,tla,tdm,ecl}-remediation.md`, update `ROADMAP.md`
8. Check off the batch in `docs/work-queue.md` with today's date
9. If you discover new cards that fit the current or a future batch while working, add them to the queue
If a batch turns out to be wrong or more complex than described, update the queue with what you learned and move on to the next one.
## Assistant
Let me start by reading the work queue to find the next unchecked batch.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md"
}
```
## Assistant
**Result** (success):
```
1→# Card Remediation Work Queue
2→
3→This document drives the batch card-fix loop. Each batch groups cards that share a common missing implementation. Work top-to-bottom; check off batches as completed.
4→
5→## Process (for each batch)
6→
7→1. **Read this file** to find the next unchecked batch
8→2. **Read the engine files** (`abilities.rs`, `game.rs`) to understand current state
9→3. **Implement** the engine change (new Effect/StaticEffect variant + match arm), if needed
10→4. **Add a test** for any new engine effect in `game.rs` `mod tests`
11→5. **Fix the cards** listed in the batch (grep to find exact lines)
12→6. **Verify**: `cargo check -p mtg-cards && cargo test --lib`
13→7. **Update docs**: Mark cards fixed in `docs/{set}-remediation.md`, update ROADMAP.md
14→8. **Check off** the batch below and note the date
15→
16→---
17→
18→## Batch 1: LoseLifeOpponents [DONE 2026-02-13]
19→
20→**Engine**: Added `Effect::LoseLifeOpponents { amount }` variant + constructor + match arm + test.
21→
22→**Cards fixed (8):**
23→- [x] FDN: Marauding Blight-Priest, Pulse Tracker, Vampire Spawn, Phyrexian Arena (LoseLife), Vampire Neonate
24→- [x] TDM: Skirmish Rhino
25→- [x] ECL: Champion of the Weird (effect part), Boggart Mischief (dies trigger part)
26→
27→---
28→
29→## Batch 2: Easy swaps — existing typed effects [DONE 2026-02-13]
30→
31→**Engine**: Modified `execute_effects` in `game.rs` to accept an optional `source: Option` parameter. When `AddCounters` or `RemoveCounters` effects have no targets, they now fall back to the source permanent (for self-targeting counter effects). Added test `add_counters_self_when_no_targets`.
32→
33→### 2a: DestroyAll — Day of Judgment
34→- [x] FDN: Day of Judgment — `Effect::Custom("Destroy all creatures.")` → `Effect::destroy_all("creatures")`
35→
36→### 2b: EntersTapped — Diregraf Ghoul
37→- [x] FDN: Diregraf Ghoul — `StaticEffect::Custom("Enters tapped.")` → `StaticEffect::EntersTapped { filter: "self".into() }`
38→
39→### 2c: CantBlock (target) — Frenzied Goblin, Brambleback Brute
40→- [x] FDN: Frenzied Goblin — `Effect::Custom("Target creature can't block this turn.")` → `Effect::CantBlock`
41→- [x] ECL: Brambleback Brute — `Effect::Custom("Target creature can't block this turn.")` → `Effect::CantBlock`
42→- **Note**: The work queue originally listed "Skoa Veteran" for batch 2c, but the actual card in ecl.rs was **Brambleback Brute**.
43→- Verify: these cards already have `TargetSpec::OpponentCreature` or similar targeting
44→
45→### 2d: Self -1/-1 counters — ECL blight creatures
46→These use `Effect::Custom("Put N -1/-1 counter(s) on .")` alongside working effects. Replace with `Effect::AddCounters`:
47→- [x] ECL: Blighted Blackthorn (x2) — `Custom("Put two -1/-1 counters on Blighted Blackthorn.")` → `Effect::add_counters("-1/-1", 2)` (appears twice, two abilities)
48→- [x] ECL: Sourbread Auntie — `Custom("Put two -1/-1 counters on Sourbread Auntie.")` → `Effect::add_counters("-1/-1", 2)`
49→- [x] ECL: Sting-Slinger — `Custom("Put a -1/-1 counter on Sting-Slinger.")` → `Effect::add_counters("-1/-1", 1)`
50→- [x] ECL: Heirloom Auntie — `Custom("Remove a -1/-1 counter from Heirloom Auntie.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
51→- [x] ECL: Encumbered Reejerey — `Custom("Remove a -1/-1 counter from Encumbered Reejerey.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
52→- [x] ECL: Reluctant Dounguard — `Custom("Remove a -1/-1 counter from Reluctant Dounguard.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
53→- [x] ECL: Bristlebane Battler — `Custom("Remove a -1/-1 counter from this creature.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
54→- **Engine tweak**: `execute_effects` now falls back to the source permanent when `AddCounters`/`RemoveCounters` have no targets (self-targeting counter effects).
55→
56→### 2e: Loot (draw then discard) — Icewind Elemental, Refute
57→- [x] FDN: Icewind Elemental — `Custom("When this creature enters, draw a card, then discard a card.")` → `Effect::draw_cards(1), Effect::discard_cards(1)`
58→- [x] FDN: Refute — `Custom("Counter target spell. Draw a card, then discard a card.")` → `Effect::counter_spell(), Effect::draw_cards(1), Effect::discard_cards(1)` + fixed TargetSpec to Spell
59→
60→### 2f: Simple ETB draw — Mistmeadow Council
61→- [x] ECL: Mistmeadow Council — `Custom("When this creature enters, draw a card.")` → `Effect::draw_cards(1)`
62→
63→### Cards NOT fixed in Batch 2 (deferred):
64→- **Warren Torchmaster** (ECL): compound Custom with self-counter + target haste (needs modal/conditional support)
65→- **Dream Seizer** (ECL): compound Custom with self-counter + opponent discard (Batch 3 dependency)
66→- **ECL line ~1843**: "Put two -1/-1 counters on each creature." — needs `AddCountersAll` variant (new engine effect)
67→- **ECL line ~464**: `Cost::Custom` for -1/-1 counter removal — not an Effect, needs Cost system fix
68→
69→---
70→
71→## Batch 3: OpponentDiscards [DONE 2026-02-13]
72→
73→**Engine**: Added `Effect::DiscardOpponents { count }` variant + `discard_opponents(count)` constructor + match arm in `execute_effects` (iterates opponents, each calls `choose_discard` then moves to graveyard). Added test `discard_opponents_effect`.
74→
75→**Cards fixed (4):**
76→- [x] FDN: Burglar Rat — `Custom("Each opponent discards a card.")` → `Effect::discard_opponents(1)`
77→- [x] FDN: Arbiter of Woe — compound Custom → `discard_opponents(1), lose_life_opponents(2), draw_cards(1), gain_life(2)`
78→- [x] FDN: Bloodtithe Collector — `Custom(conditional)` → `Effect::discard_opponents(1)` (condition "if an opponent lost life this turn" not modeled; trigger fires unconditionally)
79→- [x] ECL: Dream Seizer — `Custom(compound)` → `add_counters("-1/-1", 1), discard_opponents(1)` (self-counter via Batch 2 source fallback)
80→
81→---
82→
83→## Batch 4: Simple token creation [DONE 2026-02-13]
84→
85→**Engine**: No changes needed. `CreateToken` already works and parses P/T + keywords from `token_name`.
86→
87→**Cards fixed (8 cards, 10 effect swaps):**
88→- [x] FDN: Guarded Heir — ETB `create_token("3/3 Knight", 2)`
89→- [x] FDN: Prideful Parent — ETB `create_token("1/1 Cat", 1)`
90→- [x] FDN: Resolute Reinforcements — ETB `create_token("1/1 Soldier", 1)`
91→- [x] FDN: Release the Dogs — Spell `create_token("1/1 Dog", 4)`
92→- [x] FDN: Dwynen's Elite — ETB `create_token("1/1 Elf Warrior", 1)` (conditional "if you control another Elf" not modeled)
93→- [x] FDN: Dragonmaster Outcast — Upkeep `create_token("5/5 Dragon with flying", 1)` (conditional "six or more lands" not modeled)
94→- [x] FDN: Searslicer Goblin — End step `create_token("1/1 Goblin", 1)` (raid condition not modeled)
95→- [x] ECL: Clachan Festival — ETB `create_token("1/1 Kithkin", 2)` + Activated `Cost::pay_mana("{4}{W}")` + `create_token("1/1 Kithkin", 1)`
96→
97→**Tests added:** `framework_create_token_effect`, `framework_create_token_with_keyword`
98→
99→**Skipped/Deferred:**
100→- FDN: Cat Collector (Food token) — Food tokens are artifacts, not creatures. `CreateToken` always sets `CardType::Creature`. Needs engine support for artifact tokens (new batch).
101→- FDN: Faebloom Trick — compound effect: create 2 Faerie tokens + reflexive trigger (tap opponent creature). Needs multi-effect resolution.
102→- FDN: Mender's Bounty (Food token) — same as Cat Collector.
103→- All token copy effects (Electroduplicate, Rite of Replication, etc.) — needs Spell Copy system.
104→- All variable-count tokens (Homunculus Horde, Hare Apparent, etc.) — needs dynamic count support.
105→
106→---
107→
108→## Batch 5: Ward keyword [DONE 2026-02-13]
109→
110→**Engine**: Added `StaticEffect::Ward { cost: String }` variant + `ward()` builder. Ward is stored as structured data; mechanical enforcement (counter-unless-pay during targeting) deferred to future engine work. `KeywordAbilities::WARD` already existed in bitflags.
111→
112→**Cards fixed (7):**
113→- [x] TDM: Aegis Sculptor — `StaticEffect::Custom("Ward {2}")` → `StaticEffect::ward("{2}")` + WARD keyword
114→- [x] TDM: Ambling Stormshell — `StaticEffect::Custom("Ward {2}")` → `StaticEffect::ward("{2}")` + WARD keyword
115→- [x] TDM: Dirgur Island Dragon — `StaticEffect::Custom("Ward {2}")` → `StaticEffect::ward("{2}")` + WARD keyword
116→- [x] TDM: Scavenger Regent — `StaticEffect::Custom("Ward -- Discard a card.")` → `StaticEffect::ward("Discard a card.")` + WARD keyword
117→- [x] ECL: Bristlebane Battler — `StaticEffect::Custom("Ward {2}")` → `StaticEffect::ward("{2}")` + WARD keyword
118→- [x] FDN: Cackling Prowler — `StaticEffect::Custom("Ward {2}")` → `StaticEffect::ward("{2}")` + WARD keyword
119→- [x] FDN: Tolarian Terror — already had `KeywordAbilities::WARD` but no Ward ability; added `StaticEffect::ward("{2}")`
120→
121→**Tests added:** `static_effect_builders` extended with Ward variant checks
122→
123→---
124→
125→## Batch 6: Enters-tapped-unless (conditional ETB tapped) [DONE 2026-02-13]
126→
127→**Engine**: Added `StaticEffect::EntersTappedUnless { condition: String }` variant + `enters_tapped_unless()` builder. Condition is stored as structured data; mechanical enforcement (actually checking land types on ETB) deferred to future engine work.
128→
129→**Cards fixed (2):**
130→- [x] TDM: Cori Mountain Monastery — `StaticEffect::Custom("Enters tapped unless you control Plains or Island.")` → `StaticEffect::enters_tapped_unless("you control a Plains or an Island")`
131→- [x] TDM: Dalkovan Encampment — `StaticEffect::Custom("Enters tapped unless you control Swamp or Mountain.")` → `StaticEffect::enters_tapped_unless("you control a Swamp or a Mountain")`
132→
133→**Tests added:** `static_effect_builders` extended with EntersTappedUnless variant check
134→
135→**Note:** ECL Blood Crypt has a related but different pattern ("pay 2 life or enters tapped") — shockland mechanic, not a land-type check. Left as Custom for now.
136→
137→---
138→
139→## Batch 7: Mass keyword grant / mass boost until EOT [DONE 2026-02-13]
140→
141→**Engine**: Added `Effect::BoostAllUntilEndOfTurn { filter, power, toughness }` + `boost_all_eot()` constructor and `Effect::GrantKeywordAllUntilEndOfTurn { filter, keyword }` + `grant_keyword_all_eot()` constructor. Both implemented in `execute_effects()` with filter matching and "you control" controller check. Uses P1P1/M1M1 counters for boost (same simplification as single-target `BoostUntilEndOfTurn`). Keywords use `granted_keywords` which are cleared at EOT cleanup.
142→
143→**Cards fixed (8, 12 effect swaps):**
144→- [x] FDN: Crash Through — `Custom` → `grant_keyword_all_eot("creatures you control", "trample")` + `draw_cards(1)`
145→- [x] FDN: Overrun — 2× `Custom` → `boost_all_eot("creatures you control", 3, 3)` + `grant_keyword_all_eot("creatures you control", "trample")`
146→- [x] FDN: Make a Stand — 2× `Custom` → `boost_all_eot("creatures you control", 1, 0)` + `grant_keyword_all_eot("creatures you control", "indestructible")`
147→- [x] FDN: Heroic Reinforcements — 2× `Custom` → `boost_all_eot("creatures you control", 1, 1)` + `grant_keyword_all_eot("creatures you control", "haste")`
148→- [x] FDN: Balmor, Battlemage Captain — `Custom` → `boost_all_eot("creatures you control", 1, 0)` + `grant_keyword_all_eot("creatures you control", "trample")`
149→- [x] FDN: Claws Out — `Custom` → `boost_all_eot("creatures you control", 2, 2)`
150→- [x] ECL: Timid Shieldbearer — `Custom` → `boost_all_eot("creatures you control", 1, 1)`
151→- [x] ECL: Catharsis — `Custom` → `boost_all_eot("creatures you control", 1, 1)` + `grant_keyword_all_eot("creatures you control", "haste")`
152→
153→**Tests added:** `boost_all_and_grant_keyword_all_until_eot`
154→
155→**Skipped/Deferred:**
156→- TDM: Craterhoof (variable +X/+X) — needs dynamic count support
157→- ECL: Kithkin conditional ("+1/+0 + first strike for Kithkin only") — compound conditional filter
158→- TDM: Modal spell with mass buff option — needs modal framework (Batch 11)
159→
160→---
161→
162→## Batch 8: Fight/Bite mechanic
163→
164→**Engine**: New `Effect::Fight` (mutual damage) and/or `Effect::Bite` (one-way damage based on power).
165→
166→**Cards (~10):**
167→- [ ] FDN: Bite Down
168→- [ ] ECL: multiple fight cards
169→- [ ] TLA: Earth Rumble, others
170→
171→---
172→
173→## Batch 9: AddCountersAll (mass counter placement)
174→
175→**Engine**: Need `Effect::AddCountersAll { counter_type, count, filter }` — similar pattern to `DestroyAll`/`DealDamageAll`. Puts N counters on all permanents matching filter.
176→
177→**Cards:**
178→- [ ] ECL: Darkness Descends — `Custom("Put two -1/-1 counters on each creature.")` → `Effect::AddCountersAll { counter_type: "-1/-1", count: 2, filter: "creatures" }`
179→
180→---
181→
182→## Batch 10: Compound self-counter + target effects
183→
184→**Engine**: These cards need the ability to put counters on self AND apply a separate effect to a target in the same triggered/activated ability. The self-counter part now works (Batch 2 source fallback), but combining it with a target effect in one resolution needs verification.
185→
186→**Cards:**
187→- [ ] ECL: Warren Torchmaster — begin combat: may blight 1 (self -1/-1 counter) to give target creature haste until EOT. Needs `add_counters("-1/-1", 1)` + `gain_keyword_eot("haste")` with target.
188→- [ ] ECL: Dream Seizer — ETB: self -1/-1 counter + each opponent discards (also depends on Batch 3 OpponentDiscards)
189→
190→---
191→
192→## Batch 11: Modal spells (Choose one/two)
193→
194→**Engine**: Modal framework — player chooses mode, effects resolve based on mode selection.
195→
196→**Cards (~15+):**
197→- [ ] FDN: Abrade, Boros Charm, Slagstorm, Valorous Stance, Charming Prince
198→- [ ] TDM: multiple
199→- [ ] ECL: multiple
200→
201→---
202→
203→## Batch 12+: Larger systems
204→
205→These require more significant engine work:
206→- Equipment attach/detach (Batch 12)
207→- Planeswalker loyalty (Batch 13)
208→- Token copy (Batch 14)
209→- X-cost spells (Batch 15)
210→- Aura attachment (Batch 16)
211→- Impulse draw / exile-and-play (Batch 17)
212→- Sagas / lore counters (Batch 18)
213→- Set mechanics: Earthbend (TLA), Blight (ECL), Vivid (ECL), Behold (ECL) (Batch 19+)
214→- Cost system: `Cost::Custom` for counter removal (ECL line ~464), `Cost::RemoveCounters`, `Cost::ExileFromGraveyard`
215→
216→---
217→
218→## How to pick the next batch
219→
220→1. Always do the lowest-numbered unchecked batch first
221→2. If a batch has a NOTE about engine uncertainty, investigate before committing
222→3. After finishing a batch, update this file AND the per-set remediation docs
223→4. Run `cargo test --lib` before and after every batch
224→
```
## Assistant
## Assistant
The next unchecked batch is **Batch 8: Fight/Bite mechanic**. Let me read the engine files and investigate the cards that need this.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs"
}
```
## Assistant
**Result** (success):
```
1→// Ability framework — activated, triggered, static, spell, and mana abilities.
2→//
3→// In MTG, abilities are the things cards can do. The framework models:
4→// - **SpellAbility**: The ability a spell has while on the stack (resolve effects)
5→// - **ActivatedAbility**: "Cost: Effect" abilities that can be activated by a player
6→// - **TriggeredAbility**: "When/Whenever/At" abilities that trigger from events
7→// - **StaticAbility**: Abilities that generate continuous effects while in play
8→// - **ManaAbility**: Special activated abilities that produce mana (don't use the stack)
9→//
10→// Ported from mage.abilities.*.
11→
12→use crate::constants::{AbilityType, Zone};
13→use crate::events::{EventType, GameEvent};
14→use crate::mana::Mana;
15→use crate::types::{AbilityId, ObjectId};
16→use serde::{Deserialize, Serialize};
17→
18→// ---------------------------------------------------------------------------
19→// Cost types
20→// ---------------------------------------------------------------------------
21→
22→/// A cost that must be paid to activate an ability or cast a spell.
23→#[derive(Clone, Debug, Serialize, Deserialize)]
24→pub enum Cost {
25→ /// Pay mana (e.g. "{2}{B}").
26→ Mana(Mana),
27→ /// Tap this permanent ("{T}").
28→ TapSelf,
29→ /// Untap this permanent ("{Q}").
30→ UntapSelf,
31→ /// Pay life.
32→ PayLife(u32),
33→ /// Sacrifice this permanent.
34→ SacrificeSelf,
35→ /// Sacrifice another permanent (described by text).
36→ SacrificeOther(String),
37→ /// Discard a card.
38→ Discard(u32),
39→ /// Exile a card from hand.
40→ ExileFromHand(u32),
41→ /// Exile a card from graveyard.
42→ ExileFromGraveyard(u32),
43→ /// Remove counters from this permanent.
44→ RemoveCounters(String, u32),
45→ /// Blight N — put N -1/-1 counters on a creature you control.
46→ /// (ECL set-specific mechanic.)
47→ Blight(u32),
48→ /// Reveal a card of a specific type from hand (used by Behold).
49→ RevealFromHand(String),
50→ /// A custom/complex cost (described by text).
51→ Custom(String),
52→}
53→
54→// ---------------------------------------------------------------------------
55→// Effect types
56→// ---------------------------------------------------------------------------
57→
58→/// What an effect does when it resolves. These are the building blocks
59→/// that card implementations compose to create their abilities.
60→///
61→/// Each variant describes a specific game action. Complex cards can chain
62→/// multiple effects. The game engine interprets these to modify the state.
63→#[derive(Clone, Debug, Serialize, Deserialize)]
64→pub enum Effect {
65→ // -- Damage --
66→ /// Deal damage to target creature or player.
67→ DealDamage { amount: u32 },
68→ /// Deal damage to each creature.
69→ DealDamageAll { amount: u32, filter: String },
70→ /// Deal damage to each opponent.
71→ DealDamageOpponents { amount: u32 },
72→
73→ // -- Life --
74→ /// Gain life.
75→ GainLife { amount: u32 },
76→ /// Lose life (target player).
77→ LoseLife { amount: u32 },
78→ /// Each opponent loses life.
79→ LoseLifeOpponents { amount: u32 },
80→ /// Set life total.
81→ SetLife { amount: i32 },
82→
83→ // -- Destroy / Remove --
84→ /// Destroy target permanent.
85→ Destroy,
86→ /// Destroy all permanents matching filter.
87→ DestroyAll { filter: String },
88→ /// Exile target permanent.
89→ Exile,
90→ /// Sacrifice a permanent (owner chooses).
91→ Sacrifice { filter: String },
92→ /// Return target permanent to hand.
93→ Bounce,
94→ /// Return target card from graveyard to hand.
95→ ReturnFromGraveyard,
96→ /// Return target card from graveyard to battlefield.
97→ Reanimate,
98→
99→ // -- Cards --
100→ /// Draw cards.
101→ DrawCards { count: u32 },
102→ /// Discard cards.
103→ DiscardCards { count: u32 },
104→ /// Each opponent discards N cards.
105→ DiscardOpponents { count: u32 },
106→ /// Mill cards (library to graveyard).
107→ Mill { count: u32 },
108→ /// Scry N (look at top N, put any on bottom in any order).
109→ Scry { count: u32 },
110→ /// Search library for a card.
111→ SearchLibrary { filter: String },
112→
113→ // -- Counters --
114→ /// Put counters on target.
115→ AddCounters { counter_type: String, count: u32 },
116→ /// Remove counters from target.
117→ RemoveCounters { counter_type: String, count: u32 },
118→
119→ // -- Tokens --
120→ /// Create token creatures.
121→ CreateToken { token_name: String, count: u32 },
122→ /// Create tokens that enter tapped and attacking, then sacrifice at next end step.
123→ /// (Used by TDM Mobilize mechanic.)
124→ CreateTokenTappedAttacking { token_name: String, count: u32 },
125→
126→ // -- Mana --
127→ /// Add mana to controller's pool.
128→ AddMana { mana: Mana },
129→
130→ // -- Combat --
131→ /// Target creature can't block this turn.
132→ CantBlock,
133→ /// Target creature must block this turn.
134→ MustBlock,
135→ /// Prevent combat damage.
136→ PreventCombatDamage,
137→
138→ // -- Stats --
139→ /// Give +N/+M until end of turn.
140→ BoostUntilEndOfTurn { power: i32, toughness: i32 },
141→ /// Give +N/+M permanently (e.g. from counters, applied differently).
142→ BoostPermanent { power: i32, toughness: i32 },
143→ /// Give all matching creatures +N/+M until end of turn.
144→ BoostAllUntilEndOfTurn { filter: String, power: i32, toughness: i32 },
145→ /// Set power and toughness.
146→ SetPowerToughness { power: i32, toughness: i32 },
147→
148→ // -- Keywords --
149→ /// Grant a keyword ability until end of turn.
150→ GainKeywordUntilEndOfTurn { keyword: String },
151→ /// Grant a keyword to all matching creatures until end of turn.
152→ GrantKeywordAllUntilEndOfTurn { filter: String, keyword: String },
153→ /// Grant a keyword ability permanently.
154→ GainKeyword { keyword: String },
155→ /// Remove a keyword ability.
156→ LoseKeyword { keyword: String },
157→
158→ // -- Control --
159→ /// Gain control of target.
160→ GainControl,
161→ /// Gain control of target until end of turn.
162→ GainControlUntilEndOfTurn,
163→
164→ // -- Tap --
165→ /// Tap target permanent.
166→ TapTarget,
167→ /// Untap target permanent.
168→ UntapTarget,
169→
170→ // -- Counter spells --
171→ /// Counter target spell.
172→ CounterSpell,
173→
174→ // -- Protection --
175→ /// Target gains protection from a color/quality until end of turn.
176→ GainProtection { from: String },
177→ /// Target becomes indestructible until end of turn.
178→ Indestructible,
179→ /// Target gains hexproof until end of turn.
180→ Hexproof,
181→
182→ // -- Misc --
183→ /// A custom/complex effect described by text. The game engine or card
184→ /// code handles the specific implementation.
185→ Custom(String),
186→}
187→
188→// ---------------------------------------------------------------------------
189→// Target specification for abilities
190→// ---------------------------------------------------------------------------
191→
192→/// Describes what an ability can target.
193→#[derive(Clone, Debug, Serialize, Deserialize)]
194→pub enum TargetSpec {
195→ /// No targets.
196→ None,
197→ /// Target creature.
198→ Creature,
199→ /// Target creature or player.
200→ CreatureOrPlayer,
201→ /// Target player.
202→ Player,
203→ /// Target permanent.
204→ Permanent,
205→ /// Target permanent matching a filter.
206→ PermanentFiltered(String),
207→ /// Target spell on the stack.
208→ Spell,
209→ /// Target card in a graveyard.
210→ CardInGraveyard,
211→ /// Target card in your graveyard.
212→ CardInYourGraveyard,
213→ /// Multiple targets of the same type.
214→ Multiple { spec: Box, count: usize },
215→ /// Custom targeting (described by text).
216→ Custom(String),
217→}
218→
219→// ---------------------------------------------------------------------------
220→// Ability struct
221→// ---------------------------------------------------------------------------
222→
223→/// A concrete ability instance attached to a card or permanent.
224→///
225→/// This is a data-oriented design: each ability is a struct containing
226→/// its type, costs, effects, targets, and configuration. The game engine
227→/// interprets these to execute game actions.
228→#[derive(Clone, Debug, Serialize, Deserialize)]
229→pub struct Ability {
230→ /// Unique ID for this ability instance.
231→ pub id: AbilityId,
232→ /// The source object (card or permanent) this ability belongs to.
233→ pub source_id: ObjectId,
234→ /// What kind of ability this is.
235→ pub ability_type: AbilityType,
236→ /// Human-readable rules text.
237→ pub rules_text: String,
238→ /// The zone(s) this ability functions from (e.g. battlefield, graveyard).
239→ pub active_zones: Vec,
240→ /// Costs to activate (for activated/mana abilities).
241→ pub costs: Vec,
242→ /// Effects that happen when this ability resolves.
243→ pub effects: Vec,
244→ /// Target requirements.
245→ pub targets: TargetSpec,
246→ /// For triggered abilities: the event type(s) that trigger it.
247→ pub trigger_events: Vec,
248→ /// For triggered abilities: whether the trigger is optional ("may").
249→ pub optional_trigger: bool,
250→ /// For mana abilities: the mana produced.
251→ pub mana_produced: Option,
252→ /// For static abilities: continuous effects applied while in play.
253→ pub static_effects: Vec,
254→}
255→
256→impl Ability {
257→ /// Create a new activated ability.
258→ pub fn activated(
259→ source_id: ObjectId,
260→ rules_text: &str,
261→ costs: Vec,
262→ effects: Vec,
263→ targets: TargetSpec,
264→ ) -> Self {
265→ Ability {
266→ id: AbilityId::new(),
267→ source_id,
268→ ability_type: AbilityType::ActivatedNonMana,
269→ rules_text: rules_text.to_string(),
270→ active_zones: vec![Zone::Battlefield],
271→ costs,
272→ effects,
273→ targets,
274→ trigger_events: vec![],
275→ optional_trigger: false,
276→ mana_produced: None,
277→ static_effects: vec![],
278→ }
279→ }
280→
281→ /// Create a new triggered ability.
282→ pub fn triggered(
283→ source_id: ObjectId,
284→ rules_text: &str,
285→ trigger_events: Vec,
286→ effects: Vec,
287→ targets: TargetSpec,
288→ ) -> Self {
289→ Ability {
290→ id: AbilityId::new(),
291→ source_id,
292→ ability_type: AbilityType::TriggeredNonMana,
293→ rules_text: rules_text.to_string(),
294→ active_zones: vec![Zone::Battlefield],
295→ costs: vec![],
296→ effects,
297→ targets,
298→ trigger_events,
299→ optional_trigger: false,
300→ mana_produced: None,
301→ static_effects: vec![],
302→ }
303→ }
304→
305→ /// Create a new static ability.
306→ pub fn static_ability(
307→ source_id: ObjectId,
308→ rules_text: &str,
309→ static_effects: Vec,
310→ ) -> Self {
311→ Ability {
312→ id: AbilityId::new(),
313→ source_id,
314→ ability_type: AbilityType::Static,
315→ rules_text: rules_text.to_string(),
316→ active_zones: vec![Zone::Battlefield],
317→ costs: vec![],
318→ effects: vec![],
319→ targets: TargetSpec::None,
320→ trigger_events: vec![],
321→ optional_trigger: false,
322→ mana_produced: None,
323→ static_effects,
324→ }
325→ }
326→
327→ /// Create a mana ability (tap for mana).
328→ pub fn mana_ability(source_id: ObjectId, rules_text: &str, mana: Mana) -> Self {
329→ Ability {
330→ id: AbilityId::new(),
331→ source_id,
332→ ability_type: AbilityType::ActivatedMana,
333→ rules_text: rules_text.to_string(),
334→ active_zones: vec![Zone::Battlefield],
335→ costs: vec![Cost::TapSelf],
336→ effects: vec![Effect::AddMana { mana }],
337→ targets: TargetSpec::None,
338→ trigger_events: vec![],
339→ optional_trigger: false,
340→ mana_produced: Some(mana),
341→ static_effects: vec![],
342→ }
343→ }
344→
345→ /// Create a spell ability (the ability a spell has on the stack).
346→ pub fn spell(source_id: ObjectId, effects: Vec, targets: TargetSpec) -> Self {
347→ Ability {
348→ id: AbilityId::new(),
349→ source_id,
350→ ability_type: AbilityType::Spell,
351→ rules_text: String::new(),
352→ active_zones: vec![Zone::Stack],
353→ costs: vec![], // mana cost is on the card, not the ability
354→ effects,
355→ targets,
356→ trigger_events: vec![],
357→ optional_trigger: false,
358→ mana_produced: None,
359→ static_effects: vec![],
360→ }
361→ }
362→
363→ /// Check if this ability is a mana ability.
364→ pub fn is_mana_ability(&self) -> bool {
365→ self.ability_type == AbilityType::ActivatedMana
366→ }
367→
368→ /// Check if this ability uses the stack.
369→ pub fn uses_stack(&self) -> bool {
370→ !self.is_mana_ability()
371→ && self.ability_type != AbilityType::Static
372→ }
373→
374→ /// Check if a triggered ability should trigger from an event.
375→ pub fn should_trigger(&self, event: &GameEvent) -> bool {
376→ if self.ability_type != AbilityType::TriggeredNonMana {
377→ return false;
378→ }
379→ self.trigger_events.contains(&event.event_type)
380→ }
381→
382→ /// Check if an activated ability can be activated in the given zone.
383→ pub fn can_activate_in_zone(&self, zone: Zone) -> bool {
384→ self.active_zones.contains(&zone)
385→ }
386→
387→ /// Make this a "may" trigger (optional).
388→ pub fn set_optional(mut self) -> Self {
389→ self.optional_trigger = true;
390→ self
391→ }
392→
393→ /// Set the active zones for this ability.
394→ pub fn in_zones(mut self, zones: Vec) -> Self {
395→ self.active_zones = zones;
396→ self
397→ }
398→
399→ /// Set the rules text.
400→ pub fn with_rules_text(mut self, text: &str) -> Self {
401→ self.rules_text = text.to_string();
402→ self
403→ }
404→}
405→
406→// ---------------------------------------------------------------------------
407→// Common triggered ability builders
408→// ---------------------------------------------------------------------------
409→
410→impl Ability {
411→ /// "When ~ enters the battlefield, [effect]."
412→ pub fn enters_battlefield_triggered(
413→ source_id: ObjectId,
414→ rules_text: &str,
415→ effects: Vec,
416→ targets: TargetSpec,
417→ ) -> Self {
418→ Ability::triggered(
419→ source_id,
420→ rules_text,
421→ vec![EventType::EnteredTheBattlefield],
422→ effects,
423→ targets,
424→ )
425→ }
426→
427→ /// "When ~ dies, [effect]."
428→ pub fn dies_triggered(
429→ source_id: ObjectId,
430→ rules_text: &str,
431→ effects: Vec,
432→ targets: TargetSpec,
433→ ) -> Self {
434→ Ability::triggered(
435→ source_id,
436→ rules_text,
437→ vec![EventType::Dies],
438→ effects,
439→ targets,
440→ )
441→ .in_zones(vec![Zone::Battlefield, Zone::Graveyard])
442→ }
443→
444→ /// "Whenever ~ attacks, [effect]."
445→ pub fn attacks_triggered(
446→ source_id: ObjectId,
447→ rules_text: &str,
448→ effects: Vec,
449→ targets: TargetSpec,
450→ ) -> Self {
451→ Ability::triggered(
452→ source_id,
453→ rules_text,
454→ vec![EventType::AttackerDeclared],
455→ effects,
456→ targets,
457→ )
458→ }
459→
460→ /// "Whenever ~ deals combat damage to a player, [effect]."
461→ pub fn combat_damage_to_player_triggered(
462→ source_id: ObjectId,
463→ rules_text: &str,
464→ effects: Vec,
465→ targets: TargetSpec,
466→ ) -> Self {
467→ Ability::triggered(
468→ source_id,
469→ rules_text,
470→ vec![EventType::DamagedPlayer],
471→ effects,
472→ targets,
473→ )
474→ }
475→
476→ /// "At the beginning of your upkeep, [effect]."
477→ pub fn beginning_of_upkeep_triggered(
478→ source_id: ObjectId,
479→ rules_text: &str,
480→ effects: Vec,
481→ targets: TargetSpec,
482→ ) -> Self {
483→ Ability::triggered(
484→ source_id,
485→ rules_text,
486→ vec![EventType::UpkeepStep],
487→ effects,
488→ targets,
489→ )
490→ }
491→
492→ /// "At the beginning of your end step, [effect]."
493→ pub fn beginning_of_end_step_triggered(
494→ source_id: ObjectId,
495→ rules_text: &str,
496→ effects: Vec,
497→ targets: TargetSpec,
498→ ) -> Self {
499→ Ability::triggered(
500→ source_id,
501→ rules_text,
502→ vec![EventType::EndStep],
503→ effects,
504→ targets,
505→ )
506→ }
507→
508→ /// "Whenever you cast a spell, [effect]."
509→ pub fn spell_cast_triggered(
510→ source_id: ObjectId,
511→ rules_text: &str,
512→ effects: Vec,
513→ targets: TargetSpec,
514→ ) -> Self {
515→ Ability::triggered(
516→ source_id,
517→ rules_text,
518→ vec![EventType::SpellCast],
519→ effects,
520→ targets,
521→ )
522→ }
523→
524→ /// "Whenever another creature enters the battlefield under your control, [effect]."
525→ pub fn other_creature_etb_triggered(
526→ source_id: ObjectId,
527→ rules_text: &str,
528→ effects: Vec,
529→ targets: TargetSpec,
530→ ) -> Self {
531→ Ability::triggered(
532→ source_id,
533→ rules_text,
534→ vec![EventType::EnteredTheBattlefield],
535→ effects,
536→ targets,
537→ )
538→ }
539→
540→ /// "Whenever a creature dies, [effect]."
541→ pub fn any_creature_dies_triggered(
542→ source_id: ObjectId,
543→ rules_text: &str,
544→ effects: Vec,
545→ targets: TargetSpec,
546→ ) -> Self {
547→ Ability::triggered(
548→ source_id,
549→ rules_text,
550→ vec![EventType::Dies],
551→ effects,
552→ targets,
553→ )
554→ }
555→}
556→
557→// ---------------------------------------------------------------------------
558→// Common one-shot effect constructors
559→// ---------------------------------------------------------------------------
560→
561→impl Effect {
562→ /// "Destroy target creature/permanent."
563→ pub fn destroy() -> Self {
564→ Effect::Destroy
565→ }
566→
567→ /// "Exile target."
568→ pub fn exile() -> Self {
569→ Effect::Exile
570→ }
571→
572→ /// "Deal N damage to target."
573→ pub fn deal_damage(amount: u32) -> Self {
574→ Effect::DealDamage { amount }
575→ }
576→
577→ /// "Draw N cards."
578→ pub fn draw_cards(count: u32) -> Self {
579→ Effect::DrawCards { count }
580→ }
581→
582→ /// "Gain N life."
583→ pub fn gain_life(amount: u32) -> Self {
584→ Effect::GainLife { amount }
585→ }
586→
587→ /// "Lose N life."
588→ pub fn lose_life(amount: u32) -> Self {
589→ Effect::LoseLife { amount }
590→ }
591→
592→ /// "Each opponent loses N life."
593→ pub fn lose_life_opponents(amount: u32) -> Self {
594→ Effect::LoseLifeOpponents { amount }
595→ }
596→
597→ /// "Target creature gets +N/+M until end of turn."
598→ pub fn boost_until_eot(power: i32, toughness: i32) -> Self {
599→ Effect::BoostUntilEndOfTurn { power, toughness }
600→ }
601→
602→ /// "Target creature gets +N/+M."
603→ pub fn boost_permanent(power: i32, toughness: i32) -> Self {
604→ Effect::BoostPermanent { power, toughness }
605→ }
606→
607→ /// "Creatures [matching filter] get +N/+M until end of turn."
608→ pub fn boost_all_eot(filter: &str, power: i32, toughness: i32) -> Self {
609→ Effect::BoostAllUntilEndOfTurn {
610→ filter: filter.to_string(),
611→ power,
612→ toughness,
613→ }
614→ }
615→
616→ /// "Create N token(s)."
617→ pub fn create_token(token_name: &str, count: u32) -> Self {
618→ Effect::CreateToken {
619→ token_name: token_name.to_string(),
620→ count,
621→ }
622→ }
623→
624→ /// "Create N token(s) that are tapped and attacking. Sacrifice at next end step."
625→ /// Used by Mobilize.
626→ pub fn create_token_tapped_attacking(token_name: &str, count: u32) -> Self {
627→ Effect::CreateTokenTappedAttacking {
628→ token_name: token_name.to_string(),
629→ count,
630→ }
631→ }
632→
633→ /// "Counter target spell."
634→ pub fn counter_spell() -> Self {
635→ Effect::CounterSpell
636→ }
637→
638→ /// "Scry N."
639→ pub fn scry(count: u32) -> Self {
640→ Effect::Scry { count }
641→ }
642→
643→ /// "Mill N."
644→ pub fn mill(count: u32) -> Self {
645→ Effect::Mill { count }
646→ }
647→
648→ /// "Discard N cards."
649→ pub fn discard_cards(count: u32) -> Self {
650→ Effect::DiscardCards { count }
651→ }
652→
653→ /// "Each opponent discards N cards."
654→ pub fn discard_opponents(count: u32) -> Self {
655→ Effect::DiscardOpponents { count }
656→ }
657→
658→ /// "Return target to owner's hand."
659→ pub fn bounce() -> Self {
660→ Effect::Bounce
661→ }
662→
663→ /// "Return target card from graveyard to hand."
664→ pub fn return_from_graveyard() -> Self {
665→ Effect::ReturnFromGraveyard
666→ }
667→
668→ /// "Return target card from graveyard to battlefield."
669→ pub fn reanimate() -> Self {
670→ Effect::Reanimate
671→ }
672→
673→ /// "Put N +1/+1 counters on target."
674→ pub fn add_p1p1_counters(count: u32) -> Self {
675→ Effect::AddCounters {
676→ counter_type: "+1/+1".to_string(),
677→ count,
678→ }
679→ }
680→
681→ /// "Add counters of specified type."
682→ pub fn add_counters(counter_type: &str, count: u32) -> Self {
683→ Effect::AddCounters {
684→ counter_type: counter_type.to_string(),
685→ count,
686→ }
687→ }
688→
689→ /// "Tap target permanent."
690→ pub fn tap_target() -> Self {
691→ Effect::TapTarget
692→ }
693→
694→ /// "Untap target permanent."
695→ pub fn untap_target() -> Self {
696→ Effect::UntapTarget
697→ }
698→
699→ /// "Add mana."
700→ pub fn add_mana(mana: Mana) -> Self {
701→ Effect::AddMana { mana }
702→ }
703→
704→ /// "Gain keyword until end of turn."
705→ pub fn gain_keyword_eot(keyword: &str) -> Self {
706→ Effect::GainKeywordUntilEndOfTurn {
707→ keyword: keyword.to_string(),
708→ }
709→ }
710→
711→ /// "Creatures [matching filter] gain [keyword] until end of turn."
712→ pub fn grant_keyword_all_eot(filter: &str, keyword: &str) -> Self {
713→ Effect::GrantKeywordAllUntilEndOfTurn {
714→ filter: filter.to_string(),
715→ keyword: keyword.to_string(),
716→ }
717→ }
718→
719→ /// "Set power and toughness."
720→ pub fn set_pt(power: i32, toughness: i32) -> Self {
721→ Effect::SetPowerToughness { power, toughness }
722→ }
723→
724→ /// "Destroy all creatures" (or other filter).
725→ pub fn destroy_all(filter: &str) -> Self {
726→ Effect::DestroyAll {
727→ filter: filter.to_string(),
728→ }
729→ }
730→
731→ /// "Deal N damage to each opponent."
732→ pub fn damage_opponents(amount: u32) -> Self {
733→ Effect::DealDamageOpponents { amount }
734→ }
735→
736→ /// "Search library for a card."
737→ pub fn search_library(filter: &str) -> Self {
738→ Effect::SearchLibrary {
739→ filter: filter.to_string(),
740→ }
741→ }
742→
743→ /// "Gain control of target."
744→ pub fn gain_control() -> Self {
745→ Effect::GainControl
746→ }
747→
748→ /// "Gain control of target until end of turn."
749→ pub fn gain_control_eot() -> Self {
750→ Effect::GainControlUntilEndOfTurn
751→ }
752→
753→ /// "Target gains protection from [quality] until end of turn."
754→ pub fn gain_protection(from: &str) -> Self {
755→ Effect::GainProtection {
756→ from: from.to_string(),
757→ }
758→ }
759→
760→ /// "Target becomes indestructible until end of turn."
761→ pub fn indestructible() -> Self {
762→ Effect::Indestructible
763→ }
764→
765→ /// "Target gains hexproof until end of turn."
766→ pub fn hexproof() -> Self {
767→ Effect::Hexproof
768→ }
769→}
770→
771→// ---------------------------------------------------------------------------
772→// Common static effect builders
773→// ---------------------------------------------------------------------------
774→
775→impl StaticEffect {
776→ /// "Other creatures you control get +N/+M." (Lord effect)
777→ pub fn boost_controlled(filter: &str, power: i32, toughness: i32) -> Self {
778→ StaticEffect::Boost {
779→ filter: filter.to_string(),
780→ power,
781→ toughness,
782→ }
783→ }
784→
785→ /// "Creatures you control have [keyword]."
786→ pub fn grant_keyword_controlled(filter: &str, keyword: &str) -> Self {
787→ StaticEffect::GrantKeyword {
788→ filter: filter.to_string(),
789→ keyword: keyword.to_string(),
790→ }
791→ }
792→
793→ /// "Creatures you control can't be blocked" (or specific CantBlock variant).
794→ pub fn cant_block(filter: &str) -> Self {
795→ StaticEffect::CantBlock {
796→ filter: filter.to_string(),
797→ }
798→ }
799→
800→ /// "Creatures you control can't attack."
801→ pub fn cant_attack(filter: &str) -> Self {
802→ StaticEffect::CantAttack {
803→ filter: filter.to_string(),
804→ }
805→ }
806→
807→ /// "[Spell type] spells you cast cost {N} less."
808→ pub fn cost_reduction(filter: &str, amount: u32) -> Self {
809→ StaticEffect::CostReduction {
810→ filter: filter.to_string(),
811→ amount,
812→ }
813→ }
814→
815→ /// "Ward {cost}" — counter targeting spells/abilities unless opponent pays cost.
816→ pub fn ward(cost: &str) -> Self {
817→ StaticEffect::Ward {
818→ cost: cost.to_string(),
819→ }
820→ }
821→
822→ /// "This land enters tapped unless [condition]."
823→ pub fn enters_tapped_unless(condition: &str) -> Self {
824→ StaticEffect::EntersTappedUnless {
825→ condition: condition.to_string(),
826→ }
827→ }
828→}
829→
830→// ---------------------------------------------------------------------------
831→// Common cost builders
832→// ---------------------------------------------------------------------------
833→
834→impl Cost {
835→ /// Pay mana cost from a string like "{2}{B}".
836→ pub fn pay_mana(mana_str: &str) -> Self {
837→ use crate::mana::ManaCost;
838→ Cost::Mana(ManaCost::parse(mana_str).to_mana())
839→ }
840→
841→ /// Tap this permanent ({T}).
842→ pub fn tap_self() -> Self {
843→ Cost::TapSelf
844→ }
845→
846→ /// Sacrifice this permanent.
847→ pub fn sacrifice_self() -> Self {
848→ Cost::SacrificeSelf
849→ }
850→
851→ /// Sacrifice another permanent matching a description.
852→ pub fn sacrifice_other(filter: &str) -> Self {
853→ Cost::SacrificeOther(filter.to_string())
854→ }
855→
856→ /// Pay N life.
857→ pub fn pay_life(amount: u32) -> Self {
858→ Cost::PayLife(amount)
859→ }
860→
861→ /// Discard N cards.
862→ pub fn discard(count: u32) -> Self {
863→ Cost::Discard(count)
864→ }
865→
866→ /// Exile N cards from hand.
867→ pub fn exile_from_hand(count: u32) -> Self {
868→ Cost::ExileFromHand(count)
869→ }
870→
871→ /// Exile N cards from graveyard.
872→ pub fn exile_from_graveyard(count: u32) -> Self {
873→ Cost::ExileFromGraveyard(count)
874→ }
875→
876→ /// Remove N counters of a type from this permanent.
877→ pub fn remove_counters(counter_type: &str, count: u32) -> Self {
878→ Cost::RemoveCounters(counter_type.to_string(), count)
879→ }
880→
881→ /// Blight N — put N -1/-1 counters on a creature you control.
882→ pub fn blight(count: u32) -> Self {
883→ Cost::Blight(count)
884→ }
885→
886→ /// Reveal a card of a specific type from hand.
887→ pub fn reveal_from_hand(card_type: &str) -> Self {
888→ Cost::RevealFromHand(card_type.to_string())
889→ }
890→}
891→
892→// ---------------------------------------------------------------------------
893→// Static (continuous) effects
894→// ---------------------------------------------------------------------------
895→
896→/// A continuous effect generated by a static ability.
897→///
898→/// These are applied in the 7-layer system each time the game state is
899→/// recalculated (see effects.rs for Layer enum).
900→#[derive(Clone, Debug, Serialize, Deserialize)]
901→pub enum StaticEffect {
902→ /// Boost P/T of matching permanents.
903→ Boost {
904→ filter: String,
905→ power: i32,
906→ toughness: i32,
907→ },
908→ /// Grant a keyword to matching permanents.
909→ GrantKeyword {
910→ filter: String,
911→ keyword: String,
912→ },
913→ /// Remove a keyword from matching permanents.
914→ RemoveKeyword {
915→ filter: String,
916→ keyword: String,
917→ },
918→ /// Prevent matching permanents from attacking.
919→ CantAttack {
920→ filter: String,
921→ },
922→ /// Prevent matching permanents from blocking.
923→ CantBlock {
924→ filter: String,
925→ },
926→ /// Reduce cost of matching spells.
927→ CostReduction {
928→ filter: String,
929→ amount: u32,
930→ },
931→ /// Matching permanents enter the battlefield tapped.
932→ EntersTapped {
933→ filter: String,
934→ },
935→ /// Other players can't gain life.
936→ CantGainLife,
937→ /// Other players can't draw extra cards.
938→ CantDrawExtraCards,
939→ /// Ward — when this becomes the target of a spell or ability an opponent
940→ /// controls, counter it unless that player pays the specified cost.
941→ Ward {
942→ cost: String,
943→ },
944→ /// Enters tapped unless a condition is met (e.g. "you control a Plains or an Island").
945→ EntersTappedUnless {
946→ condition: String,
947→ },
948→ /// Custom continuous effect.
949→ Custom(String),
950→}
951→
952→// ---------------------------------------------------------------------------
953→// AbilityStore — stores abilities by source
954→// ---------------------------------------------------------------------------
955→
956→/// Stores all abilities for all objects in the game.
957→#[derive(Clone, Debug, Default, Serialize, Deserialize)]
958→pub struct AbilityStore {
959→ /// All abilities, keyed by their unique AbilityId.
960→ abilities: std::collections::HashMap,
961→ /// Index: source ObjectId → list of AbilityIds.
962→ by_source: std::collections::HashMap>,
963→}
964→
965→impl AbilityStore {
966→ pub fn new() -> Self {
967→ Self::default()
968→ }
969→
970→ /// Register an ability for a source object.
971→ pub fn add(&mut self, ability: Ability) {
972→ let id = ability.id;
973→ let source = ability.source_id;
974→ self.abilities.insert(id, ability);
975→ self.by_source.entry(source).or_default().push(id);
976→ }
977→
978→ /// Get an ability by its ID.
979→ pub fn get(&self, id: AbilityId) -> Option<&Ability> {
980→ self.abilities.get(&id)
981→ }
982→
983→ /// Get all abilities for a source object.
984→ pub fn for_source(&self, source_id: ObjectId) -> Vec<&Ability> {
985→ self.by_source
986→ .get(&source_id)
987→ .map(|ids| ids.iter().filter_map(|id| self.abilities.get(id)).collect())
988→ .unwrap_or_default()
989→ }
990→
991→ /// Get all triggered abilities that should fire for an event.
992→ pub fn triggered_by(&self, event: &GameEvent) -> Vec<&Ability> {
993→ self.abilities
994→ .values()
995→ .filter(|a| a.should_trigger(event))
996→ .collect()
997→ }
998→
999→ /// Get all mana abilities for a source.
1000→ pub fn mana_abilities_for(&self, source_id: ObjectId) -> Vec<&Ability> {
1001→ self.for_source(source_id)
1002→ .into_iter()
1003→ .filter(|a| a.is_mana_ability())
1004→ .collect()
1005→ }
1006→
1007→ /// Remove all abilities for a source (e.g. when permanent leaves battlefield).
1008→ pub fn remove_source(&mut self, source_id: ObjectId) {
1009→ if let Some(ids) = self.by_source.remove(&source_id) {
1010→ for id in ids {
1011→ self.abilities.remove(&id);
1012→ }
1013→ }
1014→ }
1015→
1016→ /// Total number of registered abilities.
1017→ pub fn len(&self) -> usize {
1018→ self.abilities.len()
1019→ }
1020→
1021→ pub fn is_empty(&self) -> bool {
1022→ self.abilities.is_empty()
1023→ }
1024→}
1025→
1026→#[cfg(test)]
1027→mod tests {
1028→ use super::*;
1029→ use crate::events::EventType;
1030→ use crate::types::PlayerId;
1031→
1032→ #[test]
1033→ fn activated_ability() {
1034→ let source = ObjectId::new();
1035→ let ability = Ability::activated(
1036→ source,
1037→ "{2}, {T}: Draw a card.",
1038→ vec![Cost::Mana(Mana::generic(2)), Cost::TapSelf],
1039→ vec![Effect::DrawCards { count: 1 }],
1040→ TargetSpec::None,
1041→ );
1042→
1043→ assert_eq!(ability.ability_type, AbilityType::ActivatedNonMana);
1044→ assert_eq!(ability.costs.len(), 2);
1045→ assert_eq!(ability.effects.len(), 1);
1046→ assert!(ability.uses_stack());
1047→ }
1048→
1049→ #[test]
1050→ fn triggered_ability() {
1051→ let source = ObjectId::new();
1052→ let ability = Ability::triggered(
1053→ source,
1054→ "When this creature enters the battlefield, draw a card.",
1055→ vec![EventType::EnteredTheBattlefield],
1056→ vec![Effect::DrawCards { count: 1 }],
1057→ TargetSpec::None,
1058→ );
1059→
1060→ assert_eq!(ability.ability_type, AbilityType::TriggeredNonMana);
1061→ assert!(ability.uses_stack());
1062→
1063→ // Check trigger matching
1064→ let event = GameEvent::enters_battlefield(source, PlayerId::new());
1065→ // The event type is EntersTheBattlefield, but our trigger watches EnteredTheBattlefield
1066→ let post_event = GameEvent::new(EventType::EnteredTheBattlefield)
1067→ .target(source);
1068→ assert!(ability.should_trigger(&post_event));
1069→ assert!(!ability.should_trigger(&event)); // pre-event, not what we trigger on
1070→ }
1071→
1072→ #[test]
1073→ fn mana_ability() {
1074→ let source = ObjectId::new();
1075→ let ability = Ability::mana_ability(
1076→ source,
1077→ "{T}: Add {G}.",
1078→ Mana::green(1),
1079→ );
1080→
1081→ assert_eq!(ability.ability_type, AbilityType::ActivatedMana);
1082→ assert!(ability.is_mana_ability());
1083→ assert!(!ability.uses_stack());
1084→ assert_eq!(ability.mana_produced, Some(Mana::green(1)));
1085→ }
1086→
1087→ #[test]
1088→ fn static_ability_boost() {
1089→ let source = ObjectId::new();
1090→ let ability = Ability::static_ability(
1091→ source,
1092→ "Other creatures you control get +1/+1.",
1093→ vec![StaticEffect::Boost {
1094→ filter: "other creatures you control".to_string(),
1095→ power: 1,
1096→ toughness: 1,
1097→ }],
1098→ );
1099→
1100→ assert_eq!(ability.ability_type, AbilityType::Static);
1101→ assert!(!ability.uses_stack());
1102→ assert_eq!(ability.static_effects.len(), 1);
1103→ }
1104→
1105→ #[test]
1106→ fn spell_ability() {
1107→ let source = ObjectId::new();
1108→ let ability = Ability::spell(
1109→ source,
1110→ vec![Effect::DealDamage { amount: 3 }],
1111→ TargetSpec::CreatureOrPlayer,
1112→ );
1113→
1114→ assert_eq!(ability.ability_type, AbilityType::Spell);
1115→ assert!(ability.uses_stack());
1116→ }
1117→
1118→ #[test]
1119→ fn ability_store() {
1120→ let mut store = AbilityStore::new();
1121→ let source = ObjectId::new();
1122→
1123→ let a1 = Ability::mana_ability(source, "{T}: Add {G}.", Mana::green(1));
1124→ let a1_id = a1.id;
1125→ let a2 = Ability::activated(
1126→ source,
1127→ "{1}{G}: +1/+1",
1128→ vec![Cost::Mana(Mana { green: 1, generic: 1, ..Default::default() })],
1129→ vec![Effect::BoostUntilEndOfTurn { power: 1, toughness: 1 }],
1130→ TargetSpec::None,
1131→ );
1132→
1133→ store.add(a1);
1134→ store.add(a2);
1135→
1136→ assert_eq!(store.len(), 2);
1137→ assert_eq!(store.for_source(source).len(), 2);
1138→ assert_eq!(store.mana_abilities_for(source).len(), 1);
1139→ assert!(store.get(a1_id).is_some());
1140→
1141→ store.remove_source(source);
1142→ assert!(store.is_empty());
1143→ }
1144→
1145→ #[test]
1146→ fn optional_trigger() {
1147→ let source = ObjectId::new();
1148→ let ability = Ability::triggered(
1149→ source,
1150→ "When ~ enters, you may draw a card.",
1151→ vec![EventType::EnteredTheBattlefield],
1152→ vec![Effect::DrawCards { count: 1 }],
1153→ TargetSpec::None,
1154→ ).set_optional();
1155→
1156→ assert!(ability.optional_trigger);
1157→ }
1158→
1159→ #[test]
1160→ fn active_zones() {
1161→ let source = ObjectId::new();
1162→ let ability = Ability::activated(
1163→ source,
1164→ "Exile from graveyard: effect",
1165→ vec![],
1166→ vec![],
1167→ TargetSpec::None,
1168→ ).in_zones(vec![Zone::Graveyard]);
1169→
1170→ assert!(ability.can_activate_in_zone(Zone::Graveyard));
1171→ assert!(!ability.can_activate_in_zone(Zone::Battlefield));
1172→ }
1173→
1174→ // ── Tests for common builders ──────────────────────────────────────
1175→
1176→ #[test]
1177→ fn etb_triggered() {
1178→ let source = ObjectId::new();
1179→ let ability = Ability::enters_battlefield_triggered(
1180→ source,
1181→ "When ~ enters, draw a card.",
1182→ vec![Effect::draw_cards(1)],
1183→ TargetSpec::None,
1184→ );
1185→
1186→ assert_eq!(ability.ability_type, AbilityType::TriggeredNonMana);
1187→ assert!(ability.trigger_events.contains(&EventType::EnteredTheBattlefield));
1188→ assert_eq!(ability.effects.len(), 1);
1189→ }
1190→
1191→ #[test]
1192→ fn dies_triggered() {
1193→ let source = ObjectId::new();
1194→ let ability = Ability::dies_triggered(
1195→ source,
1196→ "When ~ dies, each opponent loses 1 life.",
1197→ vec![Effect::damage_opponents(1)],
1198→ TargetSpec::None,
1199→ );
1200→
1201→ assert!(ability.trigger_events.contains(&EventType::Dies));
1202→ // Dies triggers work from battlefield and graveyard
1203→ assert!(ability.active_zones.contains(&Zone::Battlefield));
1204→ assert!(ability.active_zones.contains(&Zone::Graveyard));
1205→ }
1206→
1207→ #[test]
1208→ fn attacks_triggered() {
1209→ let source = ObjectId::new();
1210→ let ability = Ability::attacks_triggered(
1211→ source,
1212→ "Whenever ~ attacks, draw a card.",
1213→ vec![Effect::draw_cards(1)],
1214→ TargetSpec::None,
1215→ );
1216→
1217→ assert!(ability.trigger_events.contains(&EventType::AttackerDeclared));
1218→ }
1219→
1220→ #[test]
1221→ fn combat_damage_triggered() {
1222→ let source = ObjectId::new();
1223→ let ability = Ability::combat_damage_to_player_triggered(
1224→ source,
1225→ "Whenever ~ deals combat damage to a player, draw a card.",
1226→ vec![Effect::draw_cards(1)],
1227→ TargetSpec::None,
1228→ );
1229→
1230→ assert!(ability.trigger_events.contains(&EventType::DamagedPlayer));
1231→ }
1232→
1233→ #[test]
1234→ fn upkeep_triggered() {
1235→ let source = ObjectId::new();
1236→ let ability = Ability::beginning_of_upkeep_triggered(
1237→ source,
1238→ "At the beginning of your upkeep, gain 1 life.",
1239→ vec![Effect::gain_life(1)],
1240→ TargetSpec::None,
1241→ );
1242→
1243→ assert!(ability.trigger_events.contains(&EventType::UpkeepStep));
1244→ }
1245→
1246→ #[test]
1247→ fn end_step_triggered() {
1248→ let source = ObjectId::new();
1249→ let ability = Ability::beginning_of_end_step_triggered(
1250→ source,
1251→ "At the beginning of your end step, create a 1/1 token.",
1252→ vec![Effect::create_token("Soldier", 1)],
1253→ TargetSpec::None,
1254→ );
1255→
1256→ assert!(ability.trigger_events.contains(&EventType::EndStep));
1257→ }
1258→
1259→ #[test]
1260→ fn effect_builders() {
1261→ // Test various effect constructors
1262→ match Effect::deal_damage(3) {
1263→ Effect::DealDamage { amount } => assert_eq!(amount, 3),
1264→ _ => panic!("wrong variant"),
1265→ }
1266→
1267→ match Effect::draw_cards(2) {
1268→ Effect::DrawCards { count } => assert_eq!(count, 2),
1269→ _ => panic!("wrong variant"),
1270→ }
1271→
1272→ match Effect::gain_life(5) {
1273→ Effect::GainLife { amount } => assert_eq!(amount, 5),
1274→ _ => panic!("wrong variant"),
1275→ }
1276→
1277→ match Effect::boost_until_eot(2, 2) {
1278→ Effect::BoostUntilEndOfTurn { power, toughness } => {
1279→ assert_eq!(power, 2);
1280→ assert_eq!(toughness, 2);
1281→ }
1282→ _ => panic!("wrong variant"),
1283→ }
1284→
1285→ match Effect::create_token("Zombie", 3) {
1286→ Effect::CreateToken { token_name, count } => {
1287→ assert_eq!(token_name, "Zombie");
1288→ assert_eq!(count, 3);
1289→ }
1290→ _ => panic!("wrong variant"),
1291→ }
1292→
1293→ match Effect::add_p1p1_counters(2) {
1294→ Effect::AddCounters { counter_type, count } => {
1295→ assert_eq!(counter_type, "+1/+1");
1296→ assert_eq!(count, 2);
1297→ }
1298→ _ => panic!("wrong variant"),
1299→ }
1300→ }
1301→
1302→ #[test]
1303→ fn cost_builders() {
1304→ match Cost::tap_self() {
1305→ Cost::TapSelf => {}
1306→ _ => panic!("wrong variant"),
1307→ }
1308→
1309→ match Cost::sacrifice_self() {
1310→ Cost::SacrificeSelf => {}
1311→ _ => panic!("wrong variant"),
1312→ }
1313→
1314→ match Cost::pay_life(3) {
1315→ Cost::PayLife(n) => assert_eq!(n, 3),
1316→ _ => panic!("wrong variant"),
1317→ }
1318→
1319→ match Cost::discard(1) {
1320→ Cost::Discard(n) => assert_eq!(n, 1),
1321→ _ => panic!("wrong variant"),
1322→ }
1323→
1324→ match Cost::sacrifice_other("a creature") {
1325→ Cost::SacrificeOther(desc) => assert_eq!(desc, "a creature"),
1326→ _ => panic!("wrong variant"),
1327→ }
1328→ }
1329→
1330→ #[test]
1331→ fn static_effect_builders() {
1332→ match StaticEffect::boost_controlled("creatures you control", 1, 1) {
1333→ StaticEffect::Boost { filter, power, toughness } => {
1334→ assert_eq!(filter, "creatures you control");
1335→ assert_eq!(power, 1);
1336→ assert_eq!(toughness, 1);
1337→ }
1338→ _ => panic!("wrong variant"),
1339→ }
1340→
1341→ match StaticEffect::grant_keyword_controlled("creatures you control", "flying") {
1342→ StaticEffect::GrantKeyword { filter, keyword } => {
1343→ assert_eq!(filter, "creatures you control");
1344→ assert_eq!(keyword, "flying");
1345→ }
1346→ _ => panic!("wrong variant"),
1347→ }
1348→
1349→ match StaticEffect::cost_reduction("creature spells", 1) {
1350→ StaticEffect::CostReduction { filter, amount } => {
1351→ assert_eq!(filter, "creature spells");
1352→ assert_eq!(amount, 1);
1353→ }
1354→ _ => panic!("wrong variant"),
1355→ }
1356→
1357→ match StaticEffect::ward("{2}") {
1358→ StaticEffect::Ward { cost } => {
1359→ assert_eq!(cost, "{2}");
1360→ }
1361→ _ => panic!("wrong variant"),
1362→ }
1363→
1364→ match StaticEffect::ward("Discard a card.") {
1365→ StaticEffect::Ward { cost } => {
1366→ assert_eq!(cost, "Discard a card.");
1367→ }
1368→ _ => panic!("wrong variant"),
1369→ }
1370→
1371→ match StaticEffect::enters_tapped_unless("you control a Plains or an Island") {
1372→ StaticEffect::EntersTappedUnless { condition } => {
1373→ assert_eq!(condition, "you control a Plains or an Island");
1374→ }
1375→ _ => panic!("wrong variant"),
1376→ }
1377→ }
1378→
1379→ #[test]
1380→ fn compose_realistic_card_lightning_bolt() {
1381→ // Lightning Bolt: {R} instant, "Deal 3 damage to any target."
1382→ let source = ObjectId::new();
1383→ let ability = Ability::spell(
1384→ source,
1385→ vec![Effect::deal_damage(3)],
1386→ TargetSpec::CreatureOrPlayer,
1387→ );
1388→ assert_eq!(ability.effects.len(), 1);
1389→ assert!(ability.uses_stack());
1390→ }
1391→
1392→ #[test]
1393→ fn compose_realistic_card_llanowar_elves() {
1394→ // Llanowar Elves: {G} creature, "{T}: Add {G}."
1395→ let source = ObjectId::new();
1396→ let ability = Ability::mana_ability(source, "{T}: Add {G}.", Mana::green(1));
1397→ assert!(ability.is_mana_ability());
1398→ assert_eq!(ability.costs.len(), 1);
1399→ match &ability.costs[0] {
1400→ Cost::TapSelf => {}
1401→ _ => panic!("expected TapSelf cost"),
1402→ }
1403→ }
1404→
1405→ #[test]
1406→ fn compose_realistic_card_mulldrifter() {
1407→ // Mulldrifter: when enters, draw 2 cards
1408→ let source = ObjectId::new();
1409→ let ability = Ability::enters_battlefield_triggered(
1410→ source,
1411→ "When Mulldrifter enters the battlefield, draw two cards.",
1412→ vec![Effect::draw_cards(2)],
1413→ TargetSpec::None,
1414→ );
1415→ assert!(ability.should_trigger(&GameEvent::new(EventType::EnteredTheBattlefield).target(source)));
1416→ }
1417→
1418→ #[test]
1419→ fn compose_realistic_lord() {
1420→ // Lord of Atlantis: Other Merfolk get +1/+1 and have islandwalk.
1421→ let source = ObjectId::new();
1422→ let ability = Ability::static_ability(
1423→ source,
1424→ "Other Merfolk you control get +1/+1 and have islandwalk.",
1425→ vec![
1426→ StaticEffect::boost_controlled("other Merfolk you control", 1, 1),
1427→ StaticEffect::grant_keyword_controlled("other Merfolk you control", "islandwalk"),
1428→ ],
1429→ );
1430→ assert_eq!(ability.static_effects.len(), 2);
1431→ }
1432→}
1433→
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs"
}
```
## Assistant
**Result** (error):
```
File content (28071 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "Fight|Bite|fight|bite"
}
```
## Assistant
**Result** (error):
```
Sibling tool call errored
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "Custom\\(.*[Ff]ight|Custom\\(.*deals damage equal to its power|Custom\\(.*each deal damage|Custom\\(.*target creature deals damage"
}
```
## Assistant
**Result** (error):
```
Sibling tool call errored
```
## Assistant
## Assistant
Let me read game.rs in parts and search for the fight/bite cards.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 200
}
```
## Assistant
**Result** (success):
```
1→// Game — the top-level game runner.
2→//
3→// The Game struct ties together the GameState, TurnManager, and
4→// PlayerDecisionMaker implementations to run a complete game of Magic.
5→//
6→// The game loop follows the MTG comprehensive rules:
7→// 1. Advance to the next step/phase
8→// 2. Process turn-based actions for that step
9→// 3. Check state-based actions (loop until none found)
10→// 4. Put triggered abilities on the stack
11→// 5. Give active player priority
12→// 6. Players pass priority or take actions
13→// 7. When all pass with empty stack → advance; with items → resolve top
14→//
15→// Ported from mage.game.GameImpl.
16→
17→use crate::abilities::{Cost, Effect};
18→use crate::constants::AbilityType;
19→use crate::card::CardData;
20→use crate::constants::PhaseStep;
21→use crate::counters::CounterType;
22→use crate::decision::PlayerDecisionMaker;
23→use crate::permanent::Permanent;
24→use crate::state::{GameState, StateBasedActions};
25→use crate::turn::{has_priority, PriorityTracker, TurnManager};
26→use crate::types::{AbilityId, ObjectId, PlayerId};
27→use crate::watchers::WatcherManager;
28→use std::collections::HashMap;
29→
30→/// Maximum number of SBA iterations before we bail out (safety valve).
31→const MAX_SBA_ITERATIONS: u32 = 100;
32→
33→/// Maximum number of turns before the game is declared a draw (safety valve).
34→const MAX_TURNS: u32 = 500;
35→
36→/// Configuration for a new game.
37→pub struct GameConfig {
38→ /// Player names and their decks (as CardData vectors).
39→ pub players: Vec,
40→ /// Starting life total (default 20).
41→ pub starting_life: i32,
42→}
43→
44→/// Configuration for a single player in a new game.
45→pub struct PlayerConfig {
46→ pub name: String,
47→ pub deck: Vec,
48→}
49→
50→/// The result of a completed game.
51→#[derive(Clone, Debug)]
52→pub struct GameResult {
53→ /// The winner, or None for a draw.
54→ pub winner: Option,
55→ /// Final turn number.
56→ pub turn_number: u32,
57→ /// How the game ended.
58→ pub reason: GameEndReason,
59→}
60→
61→#[derive(Clone, Debug)]
62→pub enum GameEndReason {
63→ /// A player lost (life, poison, decked, etc.).
64→ PlayerLost,
65→ /// A player conceded.
66→ Concession,
67→ /// All opponents lost simultaneously.
68→ LastPlayerStanding,
69→ /// Maximum turns reached (safety valve).
70→ MaxTurnsReached,
71→ /// The game was a draw.
72→ Draw,
73→}
74→
75→/// The main game runner. Holds the game state and drives the game loop.
76→pub struct Game {
77→ /// The game state.
78→ pub state: GameState,
79→ /// The turn manager.
80→ pub turn_manager: TurnManager,
81→ /// Player decision-makers, keyed by PlayerId.
82→ decision_makers: HashMap>,
83→ /// Watcher manager for event tracking.
84→ pub watchers: WatcherManager,
85→}
86→
87→impl Game {
88→ /// Create a new two-player game.
89→ pub fn new_two_player(
90→ config: GameConfig,
91→ mut decision_makers: Vec<(PlayerId, Box)>,
92→ ) -> Self {
93→ assert_eq!(config.players.len(), 2, "Two-player game requires exactly 2 players");
94→ assert_eq!(decision_makers.len(), 2, "Two-player game requires exactly 2 decision makers");
95→
96→ // Create player IDs
97→ let player_ids: Vec = decision_makers.iter().map(|(id, _)| *id).collect();
98→
99→ // Build game state
100→ let player_names: Vec<(&str, PlayerId)> = config
101→ .players
102→ .iter()
103→ .zip(player_ids.iter())
104→ .map(|(pc, &id)| (pc.name.as_str(), id))
105→ .collect();
106→ let mut state = GameState::new(&player_names);
107→
108→ // Set starting life
109→ for player in state.players.values_mut() {
110→ player.life = config.starting_life;
111→ }
112→
113→ // Build card store and libraries from decks
114→ for (player_config, &player_id) in config.players.iter().zip(player_ids.iter()) {
115→ let mut card_ids = Vec::with_capacity(player_config.deck.len());
116→ for card in &player_config.deck {
117→ let mut card_data = card.clone();
118→ card_data.owner = player_id;
119→ let card_id = card_data.id;
120→ state.card_store.insert(card_data);
121→ card_ids.push(card_id);
122→ }
123→ for &card_id in &card_ids {
124→ state.object_zones.insert(
125→ card_id,
126→ crate::state::ZoneLocation {
127→ zone: crate::constants::Zone::Library,
128→ controller: Some(player_id),
129→ },
130→ );
131→ }
132→ let player = state.players.get_mut(&player_id).unwrap();
133→ for card_id in card_ids {
134→ player.library.put_on_bottom(card_id);
135→ }
136→ }
137→
138→ // Build turn manager
139→ let turn_manager = TurnManager::new(player_ids.clone());
140→
141→ // Build decision maker map
142→ let dm_map: HashMap> =
143→ decision_makers.drain(..).collect();
144→
145→ Game {
146→ state,
147→ turn_manager,
148→ decision_makers: dm_map,
149→ watchers: WatcherManager::new(),
150→ }
151→ }
152→
153→ /// Run the game to completion. Returns the game result.
154→ pub fn run(&mut self) -> GameResult {
155→ // Shuffle libraries
156→ let mut rng = rand::thread_rng();
157→ for player in self.state.players.values_mut() {
158→ player.library.shuffle(&mut rng);
159→ }
160→
161→ // Draw opening hands (7 cards each)
162→ let player_ids: Vec = self.state.turn_order.clone();
163→ for &pid in &player_ids {
164→ self.draw_cards(pid, 7);
165→ }
166→
167→ // London mulligan phase
168→ self.london_mulligan(&player_ids);
169→
170→ // Notify decision makers of game start
171→ let view = crate::decision::GameView::placeholder();
172→ for (&pid, dm) in &mut self.decision_makers {
173→ dm.on_game_start(&view, pid);
174→ }
175→
176→ // Main game loop
177→ loop {
178→ // Check safety valves
179→ if self.turn_manager.turn_number > MAX_TURNS {
180→ return GameResult {
181→ winner: None,
182→ turn_number: self.turn_manager.turn_number,
183→ reason: GameEndReason::MaxTurnsReached,
184→ };
185→ }
186→
187→ // Process current step
188→ self.process_step();
189→
190→ // Check if game should end
191→ if let Some(result) = self.check_game_end() {
192→ // Notify decision makers of game end
193→ let view = crate::decision::GameView::placeholder();
194→ for (&pid, dm) in &mut self.decision_makers {
195→ let won = result.winner == Some(pid);
196→ dm.on_game_end(&view, won);
197→ }
198→ return result;
199→ }
200→
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "Custom\\(.*[Ff]ight|Custom\\(.*deals damage equal to its power|Custom\\(.*each deal damage|Custom\\(.*target creature deals damage"
}
```
## Assistant
**Result** (success):
```
mtg-rl/mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::Custom("It fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/ecl.rs:2173: vec![Effect::Custom("Choose two: copy target Kithkin you control; target player creates 1/1 Kithkin token; target creature +3/+3 until EOT; target creature you control fights target creature an opponent controls.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:2307: vec![Effect::Custom("Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:3009: vec![Effect::Custom("Choose one: Search for basic land; or target creature you control fights target creature you don't control.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:5254: vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:6019: vec![Effect::Custom("Put a +1/+1 counter on target creature you control. Then that creature deals damage equal to its power to target creature an opponent controls.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:6798: vec![Effect::Custom("Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don’t control.".into())],
mtg-rl/mtg-cards/src/sets/tdm.rs:1215: abilities: vec![Ability::spell(id, vec![Effect::Custom("Double target creature's P/T, then it fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:2995: vec![Effect::Custom("Target Dragon you control deals damage equal to its power to any target.".into())],
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "fight|Fight|bite|Bite"
}
```
## Assistant
**Result** (success):
```
mtg-rl/mtg-cards/src/sets/ecl.rs:1796: // Sorcery {1}{G}. Target creature +1/+0, then fights opponent's creature.
mtg-rl/mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::Custom("It fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/ecl.rs:2173: vec![Effect::Custom("Choose two: copy target Kithkin you control; target player creates 1/1 Kithkin token; target creature +3/+3 until EOT; target creature you control fights target creature an opponent controls.".into())],
mtg-rl/mtg-cards/src/sets/tla.rs:91: registry.register("Jet, Freedom Fighter", jet_freedom_fighter, "TLA");
mtg-rl/mtg-cards/src/sets/tla.rs:147: registry.register("Treetop Freedom Fighters", treetop_freedom_fighters, "TLA");
mtg-rl/mtg-cards/src/sets/tla.rs:1338:fn jet_freedom_fighter(id: ObjectId, owner: PlayerId) -> CardData {
mtg-rl/mtg-cards/src/sets/tla.rs:1339: CardData { id, owner, name: "Jet, Freedom Fighter".into(),
mtg-rl/mtg-cards/src/sets/tla.rs:1348: "When Jet, Freedom Fighter enters, trigger effect.",
mtg-rl/mtg-cards/src/sets/tla.rs:1352: "When Jet, Freedom Fighter dies, trigger effect.",
mtg-rl/mtg-cards/src/sets/tla.rs:2094:fn treetop_freedom_fighters(id: ObjectId, owner: PlayerId) -> CardData {
mtg-rl/mtg-cards/src/sets/tla.rs:2095: CardData { id, owner, name: "Treetop Freedom Fighters".into(),
mtg-rl/mtg-cards/src/sets/tla.rs:2104: "When Treetop Freedom Fighters enters, trigger effect.",
mtg-rl/mtg-cards/src/sets/fdn.rs:163: registry.register("Bite Down", bite_down, "FDN");
mtg-rl/mtg-cards/src/sets/fdn.rs:386: registry.register("Arbiter of Woe", arbiter_of_woe, "FDN");
mtg-rl/mtg-cards/src/sets/fdn.rs:2301:fn bite_down(id: ObjectId, owner: PlayerId) -> CardData {
mtg-rl/mtg-cards/src/sets/fdn.rs:2303: CardData { id, owner, name: "Bite Down".into(), mana_cost: ManaCost::parse("{1}{G}"),
mtg-rl/mtg-cards/src/sets/fdn.rs:3005: // Sorcery for {G}. Choose one: search for basic land; or creature you control fights creature you don't.
mtg-rl/mtg-cards/src/sets/fdn.rs:3009: vec![Effect::Custom("Choose one: Search for basic land; or target creature you control fights target creature you don't control.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:5252: "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
mtg-rl/mtg-cards/src/sets/fdn.rs:5254: vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
mtg-rl/mtg-cards/src/sets/fdn.rs:5331:fn arbiter_of_woe(id: ObjectId, owner: PlayerId) -> CardData {
mtg-rl/mtg-cards/src/sets/fdn.rs:5332: CardData { id, owner, name: "Arbiter of Woe".into(), mana_cost: ManaCost::parse("{4}{B}{B}"),
mtg-rl/mtg-cards/src/sets/fdn.rs:6798: vec![Effect::Custom("Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don’t control.".into())],
mtg-rl/mtg-cards/src/sets/tdm.rs:259: registry.register("Teval, Arbiter of Virtue", teval_arbiter_of_virtue, "TDM");
mtg-rl/mtg-cards/src/sets/tdm.rs:1212: // Sorcery {2/G}{2/U}{2/R}. Double P/T of your creature, then fight.
mtg-rl/mtg-cards/src/sets/tdm.rs:1215: abilities: vec![Ability::spell(id, vec![Effect::Custom("Double target creature's P/T, then it fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:1228: // Sorcery {2}{G}. +1/+1 counter on your creature, then it fights opponent's creature.
mtg-rl/mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:1252: // Instant {1}{G}. Behold Dragon. Your creature fights target. If beheld, surveil 2.
mtg-rl/mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-rl/mtg-cards/src/sets/tdm.rs:3522:fn teval_arbiter_of_virtue(id: ObjectId, owner: PlayerId) -> CardData {
mtg-rl/mtg-cards/src/sets/tdm.rs:3523: CardData { id, owner, name: "Teval, Arbiter of Virtue".into(),
```
## Assistant
## Assistant
Let me get more context on each of these cards to understand their exact effects.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 2295
}
```
## Assistant
**Result** (success):
```
2295→ vec![Effect::deal_damage(3)],
2296→ TargetSpec::Creature),
2297→ ],
2298→ ..Default::default() }
2299→}
2300→
2301→fn bite_down(id: ObjectId, owner: PlayerId) -> CardData {
2302→ // Instant {1}{G}. Your creature deals damage equal to its power to creature/planeswalker.
2303→ CardData { id, owner, name: "Bite Down".into(), mana_cost: ManaCost::parse("{1}{G}"),
2304→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
2305→ abilities: vec![
2306→ Ability::spell(id,
2307→ vec![Effect::Custom("Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.".into())],
2308→ TargetSpec::Creature),
2309→ ],
2310→ ..Default::default() }
2311→}
2312→
2313→fn snakeskin_veil(id: ObjectId, owner: PlayerId) -> CardData {
2314→ // Instant {G}. +1/+1 counter on creature you control. It gains hexproof until EOT.
2315→ CardData { id, owner, name: "Snakeskin Veil".into(), mana_cost: ManaCost::parse("{G}"),
2316→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
2317→ abilities: vec![
2318→ Ability::spell(id,
2319→ vec![Effect::add_p1p1_counters(1), Effect::gain_keyword_eot("hexproof")],
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 5245
}
```
## Assistant
**Result** (success):
```
5245→ CardData { id, owner, name: "Affectionate Indrik".into(), mana_cost: ManaCost::parse("{5}{G}"),
5246→ card_types: vec![CardType::Creature],
5247→ subtypes: vec![SubType::Beast],
5248→ power: Some(4), toughness: Some(4),
5249→ rarity: Rarity::Common,
5250→ abilities: vec![
5251→ Ability::triggered(id,
5252→ "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5253→ vec![EventType::EnteredTheBattlefield],
5254→ vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
5255→ TargetSpec::None),
5256→ ],
5257→ ..Default::default() }
5258→}
5259→
5260→fn ajani_caller_of_the_pride(id: ObjectId, owner: PlayerId) -> CardData {
5261→ CardData { id, owner, name: "Ajani, Caller of the Pride".into(), mana_cost: ManaCost::parse("{1}{W}{W}"),
5262→ card_types: vec![CardType::Planeswalker],
5263→ subtypes: vec![SubType::Custom("Ajani".into())],
5264→ supertypes: vec![SuperType::Legendary],
5265→ keywords: KeywordAbilities::FLYING | KeywordAbilities::DOUBLE_STRIKE,
5266→ rarity: Rarity::Uncommon,
5267→ abilities: vec![
5268→ Ability::spell(id,
5269→ vec![Effect::Custom("+1: Put a +1/+1 counter on up to one target creature.".into())],
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 6010
}
```
## Assistant
**Result** (success):
```
6010→ ..Default::default() }
6011→}
6012→
6013→fn felling_blow(id: ObjectId, owner: PlayerId) -> CardData {
6014→ CardData { id, owner, name: "Felling Blow".into(), mana_cost: ManaCost::parse("{2}{G}"),
6015→ card_types: vec![CardType::Sorcery],
6016→ rarity: Rarity::Common,
6017→ abilities: vec![
6018→ Ability::spell(id,
6019→ vec![Effect::Custom("Put a +1/+1 counter on target creature you control. Then that creature deals damage equal to its power to target creature an opponent controls.".into())],
6020→ TargetSpec::None),
6021→ ],
6022→ ..Default::default() }
6023→}
6024→
6025→fn fiery_annihilation(id: ObjectId, owner: PlayerId) -> CardData {
6026→ CardData { id, owner, name: "Fiery Annihilation".into(), mana_cost: ManaCost::parse("{2}{R}"),
6027→ card_types: vec![CardType::Instant],
6028→ rarity: Rarity::Common,
6029→ abilities: vec![
6030→ Ability::spell(id,
6031→ vec![Effect::Custom("Fiery Annihilation deals 5 damage to target creature. Exile up to one target Equipment attached to that creature. If that creature would die this turn, exile it instead.".into())],
6032→ TargetSpec::None),
6033→ ],
6034→ ..Default::default() }
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 6790
}
```
## Assistant
**Result** (success):
```
6790→}
6791→
6792→fn primal_might(id: ObjectId, owner: PlayerId) -> CardData {
6793→ CardData { id, owner, name: "Primal Might".into(), mana_cost: ManaCost::parse("{X}{G}"),
6794→ card_types: vec![CardType::Sorcery],
6795→ rarity: Rarity::Common,
6796→ abilities: vec![
6797→ Ability::spell(id,
6798→ vec![Effect::Custom("Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don’t control.".into())],
6799→ TargetSpec::None),
6800→ ],
6801→ ..Default::default() }
6802→}
6803→
6804→fn prime_speaker_zegana(id: ObjectId, owner: PlayerId) -> CardData {
6805→ CardData { id, owner, name: "Prime Speaker Zegana".into(), mana_cost: ManaCost::parse("{2}{G}{G}{U}{U}"),
6806→ card_types: vec![CardType::Creature],
6807→ subtypes: vec![SubType::Merfolk, SubType::Wizard],
6808→ supertypes: vec![SuperType::Legendary],
6809→ power: Some(1), toughness: Some(1),
6810→ rarity: Rarity::Rare,
6811→ abilities: vec![
6812→ Ability::triggered(id,
6813→ "When Prime Speaker Zegana enters the battlefield, draw cards equal to its power.",
6814→ vec![EventType::EnteredTheBattlefield],
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/ecl.rs",
"limit": 20,
"offset": 1790
}
```
## Assistant
**Result** (success):
```
1790→ ..Default::default() }
1791→}
1792→
1793→// ── Tier 2 additional spells ──────────────────────────────────────────────────
1794→
1795→fn assert_perfection(id: ObjectId, owner: PlayerId) -> CardData {
1796→ // Sorcery {1}{G}. Target creature +1/+0, then fights opponent's creature.
1797→ CardData { id, owner, name: "Assert Perfection".into(), mana_cost: ManaCost::parse("{1}{G}"),
1798→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1799→ abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::Custom("It fights target creature you don't control.".into())], TargetSpec::Creature)],
1800→ ..Default::default() }
1801→}
1802→
1803→fn blight_rot(id: ObjectId, owner: PlayerId) -> CardData {
1804→ // Instant {2}{B}. Put four -1/-1 counters on target creature.
1805→ CardData { id, owner, name: "Blight Rot".into(), mana_cost: ManaCost::parse("{2}{B}"),
1806→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1807→ abilities: vec![Ability::spell(id, vec![Effect::add_counters("-1/-1", 4)], TargetSpec::Creature)],
1808→ ..Default::default() }
1809→}
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tdm.rs",
"limit": 50,
"offset": 1210
}
```
## Assistant
**Result** (success):
```
1210→
1211→fn dragonclaw_strike(id: ObjectId, owner: PlayerId) -> CardData {
1212→ // Sorcery {2/G}{2/U}{2/R}. Double P/T of your creature, then fight.
1213→ CardData { id, owner, name: "Dragonclaw Strike".into(), mana_cost: ManaCost::parse("{2/G}{2/U}{2/R}"),
1214→ card_types: vec![CardType::Sorcery], rarity: Rarity::Uncommon,
1215→ abilities: vec![Ability::spell(id, vec![Effect::Custom("Double target creature's P/T, then it fights target creature you don't control.".into())], TargetSpec::Creature)],
1216→ ..Default::default() }
1217→}
1218→
1219→fn dragons_prey(id: ObjectId, owner: PlayerId) -> CardData {
1220→ // Instant {2}{B}. Destroy target creature. Costs {2} more if targeting Dragon.
1221→ CardData { id, owner, name: "Dragon's Prey".into(), mana_cost: ManaCost::parse("{2}{B}"),
1222→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1223→ abilities: vec![Ability::spell(id, vec![Effect::destroy()], TargetSpec::Creature)],
1224→ ..Default::default() }
1225→}
1226→
1227→fn knockout_maneuver(id: ObjectId, owner: PlayerId) -> CardData {
1228→ // Sorcery {2}{G}. +1/+1 counter on your creature, then it fights opponent's creature.
1229→ CardData { id, owner, name: "Knockout Maneuver".into(), mana_cost: ManaCost::parse("{2}{G}"),
1230→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1231→ abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
1232→ ..Default::default() }
1233→}
1234→
1235→fn molten_exhale(id: ObjectId, owner: PlayerId) -> CardData {
1236→ // Sorcery {1}{R}. 4 damage to creature/planeswalker. Flash if behold Dragon.
1237→ CardData { id, owner, name: "Molten Exhale".into(), mana_cost: ManaCost::parse("{1}{R}"),
1238→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1239→ abilities: vec![Ability::spell(id, vec![Effect::deal_damage(4)], TargetSpec::Creature)],
1240→ ..Default::default() }
1241→}
1242→
1243→fn narsets_rebuke(id: ObjectId, owner: PlayerId) -> CardData {
1244→ // Instant {4}{R}. 5 damage to creature. Add {U}{R}{W}. Exile if dies.
1245→ CardData { id, owner, name: "Narset's Rebuke".into(), mana_cost: ManaCost::parse("{4}{R}"),
1246→ card_types: vec![CardType::Instant], rarity: Rarity::Uncommon,
1247→ abilities: vec![Ability::spell(id, vec![Effect::deal_damage(5)], TargetSpec::Creature)],
1248→ ..Default::default() }
1249→}
1250→
1251→fn piercing_exhale(id: ObjectId, owner: PlayerId) -> CardData {
1252→ // Instant {1}{G}. Behold Dragon. Your creature fights target. If beheld, surveil 2.
1253→ CardData { id, owner, name: "Piercing Exhale".into(), mana_cost: ManaCost::parse("{1}{G}"),
1254→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1255→ abilities: vec![Ability::spell(id, vec![Effect::Custom("Target creature you control fights target creature you don't control.".into())], TargetSpec::Creature)],
1256→ ..Default::default() }
1257→}
1258→
1259→fn rebellious_strike(id: ObjectId, owner: PlayerId) -> CardData {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tdm.rs",
"limit": 15,
"offset": 2988
}
```
## Assistant
**Result** (success):
```
2988→ card_types: vec![CardType::Land],
2989→ rarity: Rarity::Rare,
2990→ abilities: vec![
2991→ Ability::mana_ability(id, "{T}: Add {C}.", Mana::colorless(1)),
2992→ Ability::activated(id,
2993→ "{4}, {T}: Target Dragon you control deals damage equal to its power to any target.",
2994→ vec![Cost::pay_mana("{4}"), Cost::TapSelf],
2995→ vec![Effect::Custom("Target Dragon you control deals damage equal to its power to any target.".into())],
2996→ TargetSpec::Custom("target Dragon you control, any target".into())),
2997→ ],
2998→ ..Default::default() }
2999→}
3000→
3001→fn magmatic_hellkite(id: ObjectId, owner: PlayerId) -> CardData {
3002→ CardData { id, owner, name: "Magmatic Hellkite".into(),
```
## Assistant
## Assistant
Let me also check TLA for Earth Rumble and other fight cards mentioned in the work queue.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tla.rs",
"pattern": "Earth Rumble|earth_rumble"
}
```
## Assistant
**Result** (success):
```
50: registry.register("Earth Rumble", earth_rumble, "TLA");
51: registry.register("Earth Rumble Wrestlers", earth_rumble_wrestlers, "TLA");
778:fn earth_rumble(id: ObjectId, owner: PlayerId) -> CardData {
779: CardData { id, owner, name: "Earth Rumble".into(),
786:fn earth_rumble_wrestlers(id: ObjectId, owner: PlayerId) -> CardData {
787: CardData { id, owner, name: "Earth Rumble Wrestlers".into(),
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tla.rs",
"pattern": "Custom\\(.*fight|Custom\\(.*deals damage equal"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tla.rs",
"limit": 25,
"offset": 775
}
```
## Assistant
**Result** (success):
```
775→ ..Default::default() }
776→}
777→
778→fn earth_rumble(id: ObjectId, owner: PlayerId) -> CardData {
779→ CardData { id, owner, name: "Earth Rumble".into(),
780→ mana_cost: ManaCost::parse("{3}{G}"),
781→ card_types: vec![CardType::Sorcery],
782→ rarity: Rarity::Uncommon,
783→ ..Default::default() }
784→}
785→
786→fn earth_rumble_wrestlers(id: ObjectId, owner: PlayerId) -> CardData {
787→ CardData { id, owner, name: "Earth Rumble Wrestlers".into(),
788→ mana_cost: ManaCost::parse("{3}{R/G}"),
789→ card_types: vec![CardType::Creature],
790→ subtypes: vec![SubType::Human, SubType::Warrior, SubType::Performer],
791→ power: Some(3), toughness: Some(4),
792→ rarity: Rarity::Common,
793→ keywords: KeywordAbilities::REACH | KeywordAbilities::TRAMPLE,
794→ abilities: vec![
795→ Ability::static_ability(id,
796→ "Conditional static effect.",
797→ vec![StaticEffect::Custom("Conditional continuous effect.".into())]),
798→ ],
799→ ..Default::default() }
```
## Assistant
## Assistant
Let me look at how the engine handles execute_effects, especially how targets work.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn execute_effects"
}
```
## Assistant
**Result** (success):
```
949: pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 250,
"offset": 949
}
```
## Assistant
**Result** (success):
```
949→ pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
950→ for effect in effects {
951→ match effect {
952→ Effect::DealDamage { amount } => {
953→ // Deal damage to target permanents.
954→ // Player targeting is handled separately via SelectedTargets.
955→ for &target_id in targets {
956→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
957→ perm.apply_damage(*amount);
958→ }
959→ }
960→ // If no permanent targets, deal damage to opponents
961→ // (simplified for "deal N damage to target opponent" effects)
962→ if targets.is_empty() {
963→ if let Some(opp_id) = self.state.opponent_of(controller) {
964→ if let Some(opp) = self.state.players.get_mut(&opp_id) {
965→ opp.life -= *amount as i32;
966→ }
967→ }
968→ }
969→ }
970→ Effect::Destroy => {
971→ for &target_id in targets {
972→ if let Some(perm) = self.state.battlefield.get(target_id) {
973→ if !perm.has_indestructible() {
974→ if let Some(perm) = self.state.battlefield.remove(target_id) {
975→ self.state.ability_store.remove_source(target_id);
976→ self.move_card_to_graveyard_inner(target_id, perm.owner());
977→ }
978→ }
979→ }
980→ }
981→ }
982→ Effect::Exile => {
983→ for &target_id in targets {
984→ if self.state.battlefield.remove(target_id).is_some() {
985→ self.state.ability_store.remove_source(target_id);
986→ self.state.exile.exile(target_id);
987→ self.state.set_zone(target_id, crate::constants::Zone::Exile, None);
988→ }
989→ }
990→ }
991→ Effect::Bounce => {
992→ for &target_id in targets {
993→ if let Some(perm) = self.state.battlefield.remove(target_id) {
994→ self.state.ability_store.remove_source(target_id);
995→ let owner = perm.owner();
996→ if let Some(player) = self.state.players.get_mut(&owner) {
997→ player.hand.add(target_id);
998→ }
999→ self.state.set_zone(target_id, crate::constants::Zone::Hand, Some(owner));
1000→ }
1001→ }
1002→ }
1003→ Effect::DrawCards { count } => {
1004→ self.draw_cards(controller, *count);
1005→ }
1006→ Effect::GainLife { amount } => {
1007→ if let Some(player) = self.state.players.get_mut(&controller) {
1008→ player.life += *amount as i32;
1009→ }
1010→ }
1011→ Effect::LoseLife { amount } => {
1012→ // Controller loses life (target player effects will use
1013→ // SelectedTargets for proper player targeting)
1014→ if let Some(player) = self.state.players.get_mut(&controller) {
1015→ player.life -= *amount as i32;
1016→ }
1017→ }
1018→ Effect::LoseLifeOpponents { amount } => {
1019→ let opponents: Vec = self.state.turn_order.iter()
1020→ .filter(|&&id| id != controller)
1021→ .copied()
1022→ .collect();
1023→ for opp in opponents {
1024→ if let Some(player) = self.state.players.get_mut(&opp) {
1025→ player.life -= *amount as i32;
1026→ }
1027→ }
1028→ }
1029→ Effect::DealDamageOpponents { amount } => {
1030→ let opponents: Vec = self.state.turn_order.iter()
1031→ .filter(|&&id| id != controller)
1032→ .copied()
1033→ .collect();
1034→ for opp in opponents {
1035→ if let Some(player) = self.state.players.get_mut(&opp) {
1036→ player.life -= *amount as i32;
1037→ }
1038→ }
1039→ }
1040→ Effect::AddCounters { counter_type, count } => {
1041→ let ct = crate::counters::CounterType::from_name(counter_type);
1042→ // If no targets, fall back to source (self-targeting counters)
1043→ let effective_targets: Vec = if targets.is_empty() {
1044→ source.into_iter().collect()
1045→ } else {
1046→ targets.to_vec()
1047→ };
1048→ for target_id in effective_targets {
1049→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1050→ perm.add_counters(ct.clone(), *count);
1051→ }
1052→ }
1053→ }
1054→ Effect::BoostUntilEndOfTurn { power, toughness: _ } => {
1055→ // Simplified: directly modify counters (proper implementation
1056→ // would use continuous effects that expire at end of turn)
1057→ for &target_id in targets {
1058→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1059→ if *power > 0 {
1060→ perm.add_counters(CounterType::P1P1, *power as u32);
1061→ }
1062→ // Note: This is a simplification; real boost until EOT
1063→ // uses continuous effects, not counters
1064→ }
1065→ }
1066→ }
1067→ Effect::TapTarget => {
1068→ for &target_id in targets {
1069→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1070→ perm.tap();
1071→ }
1072→ }
1073→ }
1074→ Effect::UntapTarget => {
1075→ for &target_id in targets {
1076→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1077→ perm.untap();
1078→ }
1079→ }
1080→ }
1081→ Effect::CounterSpell => {
1082→ // Counter first target on the stack
1083→ for &target_id in targets {
1084→ if let Some(stack_item) = self.state.stack.remove(target_id) {
1085→ match &stack_item.kind {
1086→ crate::zones::StackItemKind::Spell { .. } => {
1087→ self.move_card_to_graveyard_inner(stack_item.id, stack_item.controller);
1088→ }
1089→ _ => {} // Countered abilities just vanish
1090→ }
1091→ }
1092→ }
1093→ }
1094→ Effect::AddMana { mana } => {
1095→ if let Some(player) = self.state.players.get_mut(&controller) {
1096→ player.mana_pool.add(*mana, None, false);
1097→ }
1098→ }
1099→ Effect::DiscardCards { count } => {
1100→ // Controller discards (simplified: discard from the back of hand)
1101→ let hand: Vec = self.state.players.get(&controller)
1102→ .map(|p| p.hand.iter().copied().collect())
1103→ .unwrap_or_default();
1104→ let view = crate::decision::GameView::placeholder();
1105→ let to_discard = if let Some(dm) = self.decision_makers.get_mut(&controller) {
1106→ dm.choose_discard(&view, &hand, *count as usize)
1107→ } else {
1108→ hand.iter().rev().take(*count as usize).copied().collect()
1109→ };
1110→ for card_id in to_discard {
1111→ if let Some(player) = self.state.players.get_mut(&controller) {
1112→ player.hand.remove(card_id);
1113→ }
1114→ self.move_card_to_graveyard_inner(card_id, controller);
1115→ }
1116→ }
1117→ Effect::DiscardOpponents { count } => {
1118→ let opponents: Vec = self.state.turn_order.iter()
1119→ .filter(|&&id| id != controller)
1120→ .copied()
1121→ .collect();
1122→ for opp in opponents {
1123→ let hand: Vec = self.state.players.get(&opp)
1124→ .map(|p| p.hand.iter().copied().collect())
1125→ .unwrap_or_default();
1126→ let view = crate::decision::GameView::placeholder();
1127→ let to_discard = if let Some(dm) = self.decision_makers.get_mut(&opp) {
1128→ dm.choose_discard(&view, &hand, *count as usize)
1129→ } else {
1130→ hand.iter().rev().take(*count as usize).copied().collect()
1131→ };
1132→ for card_id in to_discard {
1133→ if let Some(player) = self.state.players.get_mut(&opp) {
1134→ player.hand.remove(card_id);
1135→ }
1136→ self.move_card_to_graveyard_inner(card_id, opp);
1137→ }
1138→ }
1139→ }
1140→ Effect::Mill { count } => {
1141→ for _ in 0..*count {
1142→ let card_id = self.state.players.get_mut(&controller)
1143→ .and_then(|p| p.library.draw());
1144→ if let Some(card_id) = card_id {
1145→ self.move_card_to_graveyard_inner(card_id, controller);
1146→ }
1147→ }
1148→ }
1149→ Effect::CreateToken { token_name, count } => {
1150→ for _ in 0..*count {
1151→ // Create a minimal token permanent
1152→ let token_id = ObjectId::new();
1153→ let mut card = CardData::new(token_id, controller, token_name);
1154→ card.card_types = vec![crate::constants::CardType::Creature];
1155→ // Parse token stats from name (e.g. "4/4 Dragon with flying")
1156→ let (p, t, kw) = Self::parse_token_stats(token_name);
1157→ card.power = Some(p);
1158→ card.toughness = Some(t);
1159→ card.keywords = kw;
1160→ let perm = Permanent::new(card, controller);
1161→ self.state.battlefield.add(perm);
1162→ self.state.set_zone(token_id, crate::constants::Zone::Battlefield, None);
1163→ }
1164→ }
1165→ Effect::Scry { count } => {
1166→ // Scry N: look at top N cards, put any number on bottom in any order,
1167→ // rest on top in any order. Simplified: AI picks which to bottom.
1168→ if let Some(player) = self.state.players.get(&controller) {
1169→ let top_cards: Vec = player.library.peek(*count as usize).to_vec();
1170→ if !top_cards.is_empty() {
1171→ let view = crate::decision::GameView::placeholder();
1172→ let to_bottom = if let Some(dm) = self.decision_makers.get_mut(&controller) {
1173→ // Ask AI which cards to put on bottom (0 to all)
1174→ dm.choose_cards_to_put_back(&view, &top_cards, 0)
1175→ } else {
1176→ // Default: put nothing on bottom (keep all on top)
1177→ Vec::new()
1178→ };
1179→ // Remove selected cards and put them on bottom
1180→ for &card_id in &to_bottom {
1181→ if let Some(player) = self.state.players.get_mut(&controller) {
1182→ player.library.remove(card_id);
1183→ player.library.put_on_bottom(card_id);
1184→ }
1185→ }
1186→ }
1187→ }
1188→ }
1189→ Effect::ReturnFromGraveyard => {
1190→ // Return target card from graveyard to owner's hand
1191→ for &target_id in targets {
1192→ // Find which player's graveyard contains this card
1193→ let owner = self.state.find_card_owner_in_graveyard(target_id);
1194→ if let Some(owner_id) = owner {
1195→ if let Some(player) = self.state.players.get_mut(&owner_id) {
1196→ if player.graveyard.remove(target_id) {
1197→ player.hand.add(target_id);
1198→ self.state.set_zone(target_id, crate::constants::Zone::Hand, Some(owner_id));
```
## Assistant
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 200,
"offset": 1199
}
```
## Assistant
**Result** (success):
```
1199→ }
1200→ }
1201→ }
1202→ }
1203→ }
1204→ Effect::Reanimate => {
1205→ // Return target card from graveyard to battlefield under controller's control
1206→ for &target_id in targets {
1207→ let owner = self.state.find_card_owner_in_graveyard(target_id);
1208→ if let Some(owner_id) = owner {
1209→ if let Some(player) = self.state.players.get_mut(&owner_id) {
1210→ player.graveyard.remove(target_id);
1211→ }
1212→ // Get card data from the card store to create a permanent
1213→ if let Some(card_data) = self.state.card_store.remove(target_id) {
1214→ let perm = Permanent::new(card_data, controller);
1215→ self.state.battlefield.add(perm);
1216→ self.state.set_zone(target_id, crate::constants::Zone::Battlefield, None);
1217→ }
1218→ }
1219→ }
1220→ }
1221→ Effect::GainKeywordUntilEndOfTurn { keyword } => {
1222→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(keyword) {
1223→ for &target_id in targets {
1224→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1225→ perm.granted_keywords |= kw;
1226→ }
1227→ }
1228→ }
1229→ }
1230→ Effect::GainKeyword { keyword } => {
1231→ // Grant keyword permanently (via granted_keywords, which persists)
1232→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(keyword) {
1233→ for &target_id in targets {
1234→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1235→ perm.granted_keywords |= kw;
1236→ }
1237→ }
1238→ }
1239→ }
1240→ Effect::Indestructible => {
1241→ // Grant indestructible until end of turn
1242→ for &target_id in targets {
1243→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1244→ perm.granted_keywords |= crate::constants::KeywordAbilities::INDESTRUCTIBLE;
1245→ }
1246→ }
1247→ }
1248→ Effect::Hexproof => {
1249→ // Grant hexproof until end of turn
1250→ for &target_id in targets {
1251→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1252→ perm.granted_keywords |= crate::constants::KeywordAbilities::HEXPROOF;
1253→ }
1254→ }
1255→ }
1256→ Effect::CantBlock => {
1257→ // Target creature can't block this turn.
1258→ // Simplified: grant a pseudo-keyword. The combat system checks
1259→ // granted_keywords for blocking restrictions.
1260→ // For now, we mark via a flag (using removed_keywords to prevent DEFENDER
1261→ // from mattering is not the right approach). We'll use a simple approach:
1262→ // add a "can't block" counter that gets cleared at cleanup.
1263→ for &target_id in targets {
1264→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1265→ // Use a sentinel counter to indicate can't block
1266→ perm.add_counters(crate::counters::CounterType::Custom("cant_block".into()), 1);
1267→ }
1268→ }
1269→ }
1270→ Effect::Sacrifice { filter } => {
1271→ // Each opponent sacrifices a permanent matching filter.
1272→ // For "target player sacrifices" effects, this targets the opponent.
1273→ let opponents: Vec = self.state.turn_order.iter()
1274→ .filter(|&&id| id != controller)
1275→ .copied()
1276→ .collect();
1277→ for opp in opponents {
1278→ // Find permanents controlled by opponent matching filter
1279→ let matching: Vec = self.state.battlefield.iter()
1280→ .filter(|p| p.controller == opp && Self::matches_filter(p, filter))
1281→ .map(|p| p.id())
1282→ .collect();
1283→ if let Some(&victim_id) = matching.first() {
1284→ // Simplified: sacrifice the first matching permanent
1285→ // (proper implementation would let opponent choose)
1286→ if let Some(perm) = self.state.battlefield.remove(victim_id) {
1287→ self.state.ability_store.remove_source(victim_id);
1288→ self.move_card_to_graveyard_inner(victim_id, perm.owner());
1289→ }
1290→ }
1291→ }
1292→ }
1293→ Effect::DestroyAll { filter } => {
1294→ // Destroy all permanents matching filter
1295→ let to_destroy: Vec<(ObjectId, PlayerId)> = self.state.battlefield.iter()
1296→ .filter(|p| Self::matches_filter(p, filter) && !p.has_indestructible())
1297→ .map(|p| (p.id(), p.owner()))
1298→ .collect();
1299→ for (id, owner) in to_destroy {
1300→ if self.state.battlefield.remove(id).is_some() {
1301→ self.state.ability_store.remove_source(id);
1302→ self.move_card_to_graveyard_inner(id, owner);
1303→ }
1304→ }
1305→ }
1306→ Effect::DealDamageAll { amount, filter } => {
1307→ // Deal damage to all creatures matching filter
1308→ let matching: Vec = self.state.battlefield.iter()
1309→ .filter(|p| p.is_creature() && Self::matches_filter(p, filter))
1310→ .map(|p| p.id())
1311→ .collect();
1312→ for id in matching {
1313→ if let Some(perm) = self.state.battlefield.get_mut(id) {
1314→ perm.apply_damage(*amount);
1315→ }
1316→ }
1317→ }
1318→ Effect::RemoveCounters { counter_type, count } => {
1319→ let ct = crate::counters::CounterType::from_name(counter_type);
1320→ // If no targets, fall back to source (self-targeting counters)
1321→ let effective_targets: Vec = if targets.is_empty() {
1322→ source.into_iter().collect()
1323→ } else {
1324→ targets.to_vec()
1325→ };
1326→ for target_id in effective_targets {
1327→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1328→ perm.counters.remove(&ct, *count);
1329→ }
1330→ }
1331→ }
1332→ Effect::SearchLibrary { filter } => {
1333→ // Search library for a card matching filter and put it in hand.
1334→ // Simplified: find the first matching card.
1335→ if let Some(player) = self.state.players.get(&controller) {
1336→ let lib_cards: Vec = player.library.iter().copied().collect();
1337→ let found = lib_cards.iter().find(|&&card_id| {
1338→ self.state.card_store.get(card_id)
1339→ .map(|c| Self::card_matches_filter(c, filter))
1340→ .unwrap_or(false)
1341→ }).copied();
1342→ if let Some(card_id) = found {
1343→ if let Some(player) = self.state.players.get_mut(&controller) {
1344→ player.library.remove(card_id);
1345→ player.hand.add(card_id);
1346→ self.state.set_zone(card_id, crate::constants::Zone::Hand, Some(controller));
1347→ }
1348→ }
1349→ }
1350→ }
1351→ Effect::CreateTokenTappedAttacking { token_name, count } => {
1352→ // Create tokens tapped and attacking (used by Mobilize mechanic)
1353→ for _ in 0..*count {
1354→ let token_id = ObjectId::new();
1355→ let mut card = CardData::new(token_id, controller, token_name);
1356→ card.card_types = vec![crate::constants::CardType::Creature];
1357→ let (p, t, kw) = Self::parse_token_stats(token_name);
1358→ card.power = Some(p);
1359→ card.toughness = Some(t);
1360→ card.keywords = kw;
1361→ let mut perm = Permanent::new(card, controller);
1362→ perm.tapped = true;
1363→ perm.summoning_sick = false; // Can attack since entering tapped and attacking
1364→ self.state.battlefield.add(perm);
1365→ self.state.set_zone(token_id, crate::constants::Zone::Battlefield, None);
1366→ }
1367→ }
1368→ Effect::BoostPermanent { power, toughness: _ } => {
1369→ // Permanent P/T boost (similar to BoostUntilEndOfTurn but doesn't expire)
1370→ for &target_id in targets {
1371→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1372→ if *power > 0 {
1373→ perm.add_counters(CounterType::P1P1, *power as u32);
1374→ } else if *power < 0 {
1375→ perm.add_counters(CounterType::M1M1, (-*power) as u32);
1376→ }
1377→ }
1378→ }
1379→ }
1380→ Effect::SetPowerToughness { power, toughness } => {
1381→ // Set base P/T (simplified: adjust via counters to reach target)
1382→ for &target_id in targets {
1383→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1384→ let current_p = perm.power();
1385→ let current_t = perm.toughness();
1386→ let dp = *power - current_p;
1387→ let dt = *toughness - current_t;
1388→ // Use counters to approximate (imperfect but functional)
1389→ if dp > 0 {
1390→ perm.add_counters(CounterType::P1P1, dp as u32);
1391→ } else if dp < 0 {
1392→ perm.add_counters(CounterType::M1M1, (-dp) as u32);
1393→ }
1394→ let _ = dt; // Toughness adjustment via counters is coupled with power
1395→ }
1396→ }
1397→ }
1398→ Effect::LoseKeyword { keyword } => {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 150,
"offset": 1398
}
```
## Assistant
**Result** (success):
```
1398→ Effect::LoseKeyword { keyword } => {
1399→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(keyword) {
1400→ for &target_id in targets {
1401→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1402→ perm.removed_keywords |= kw;
1403→ }
1404→ }
1405→ }
1406→ }
1407→ Effect::BoostAllUntilEndOfTurn { filter, power, toughness: _ } => {
1408→ // Give all matching creatures controlled by the effect's controller +N/+M until EOT
1409→ let you_control = filter.to_lowercase().contains("you control");
1410→ let matching: Vec = self.state.battlefield.iter()
1411→ .filter(|p| p.is_creature()
1412→ && (!you_control || p.controller == controller)
1413→ && Self::matches_filter(p, filter))
1414→ .map(|p| p.id())
1415→ .collect();
1416→ for id in matching {
1417→ if let Some(perm) = self.state.battlefield.get_mut(id) {
1418→ if *power > 0 {
1419→ perm.add_counters(CounterType::P1P1, *power as u32);
1420→ } else if *power < 0 {
1421→ perm.add_counters(CounterType::M1M1, (-*power) as u32);
1422→ }
1423→ }
1424→ }
1425→ }
1426→ Effect::GrantKeywordAllUntilEndOfTurn { filter, keyword } => {
1427→ // Grant keyword to all matching creatures controlled by the effect's controller until EOT
1428→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(keyword) {
1429→ let you_control = filter.to_lowercase().contains("you control");
1430→ let matching: Vec = self.state.battlefield.iter()
1431→ .filter(|p| p.is_creature()
1432→ && (!you_control || p.controller == controller)
1433→ && Self::matches_filter(p, filter))
1434→ .map(|p| p.id())
1435→ .collect();
1436→ for id in matching {
1437→ if let Some(perm) = self.state.battlefield.get_mut(id) {
1438→ perm.granted_keywords |= kw;
1439→ }
1440→ }
1441→ }
1442→ }
1443→ _ => {
1444→ // Remaining effects not yet implemented (gain control, protection, etc.)
1445→ }
1446→ }
1447→ }
1448→ }
1449→
1450→ /// Move a card to its owner's graveyard (internal version that doesn't need owner lookup).
1451→ fn move_card_to_graveyard_inner(&mut self, card_id: ObjectId, owner: PlayerId) {
1452→ if let Some(player) = self.state.players.get_mut(&owner) {
1453→ player.graveyard.add(card_id);
1454→ self.state.set_zone(card_id, crate::constants::Zone::Graveyard, Some(owner));
1455→ }
1456→ }
1457→
1458→ /// Move a card to its owner's graveyard.
1459→ fn move_card_to_graveyard(&mut self, card_id: ObjectId, owner: PlayerId) {
1460→ if let Some(player) = self.state.players.get_mut(&owner) {
1461→ player.graveyard.add(card_id);
1462→ self.state.set_zone(card_id, crate::constants::Zone::Graveyard, Some(owner));
1463→ }
1464→ }
1465→
1466→ /// Draw N cards for a player.
1467→ pub fn draw_cards(&mut self, player_id: PlayerId, count: u32) {
1468→ for _ in 0..count {
1469→ let card_id = {
1470→ let player = match self.state.players.get_mut(&player_id) {
1471→ Some(p) => p,
1472→ None => return,
1473→ };
1474→ match player.library.draw() {
1475→ Some(id) => id,
1476→ None => {
1477→ // Tried to draw from empty library — player loses (set flag)
1478→ player.lost = true;
1479→ return;
1480→ }
1481→ }
1482→ };
1483→
1484→ // Add to hand and update zone
1485→ if let Some(player) = self.state.players.get_mut(&player_id) {
1486→ player.hand.add(card_id);
1487→ }
1488→ self.state.set_zone(card_id, crate::constants::Zone::Hand, Some(player_id));
1489→ }
1490→ }
1491→
1492→ /// Parse token stats from a token name string like "4/4 Dragon with flying".
1493→ /// Returns (power, toughness, keywords).
1494→ fn parse_token_stats(token_name: &str) -> (i32, i32, crate::constants::KeywordAbilities) {
1495→ let name = token_name.trim();
1496→ // Try to match "P/T Name..." pattern at the start
1497→ let mut power = 1i32;
1498→ let mut toughness = 1i32;
1499→ let mut keywords = crate::constants::KeywordAbilities::empty();
1500→
1501→ // Check for "P/T " prefix
1502→ let rest = if let Some(slash_pos) = name.find('/') {
1503→ if let Ok(p) = name[..slash_pos].parse::() {
1504→ // Find end of toughness (next space or end)
1505→ let after_slash = &name[slash_pos + 1..];
1506→ let t_end = after_slash.find(' ').unwrap_or(after_slash.len());
1507→ if let Ok(t) = after_slash[..t_end].parse::() {
1508→ power = p;
1509→ toughness = t;
1510→ if t_end < after_slash.len() {
1511→ &after_slash[t_end + 1..]
1512→ } else {
1513→ ""
1514→ }
1515→ } else {
1516→ name
1517→ }
1518→ } else {
1519→ name
1520→ }
1521→ } else {
1522→ name
1523→ };
1524→
1525→ // Parse "with keyword1[, keyword2...]" or "with keyword1 and keyword2"
1526→ if let Some(with_pos) = rest.to_lowercase().find("with ") {
1527→ let kw_str = &rest[with_pos + 5..];
1528→ for part in kw_str.split(|c: char| c == ',' || c == '&') {
1529→ let part = part.trim().trim_start_matches("and ").trim();
1530→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(part) {
1531→ keywords |= kw;
1532→ }
1533→ }
1534→ }
1535→
1536→ (power, toughness, keywords)
1537→ }
1538→
1539→ /// Check if a permanent matches a simple filter string.
1540→ fn matches_filter(perm: &Permanent, filter: &str) -> bool {
1541→ let f = filter.to_lowercase();
1542→ // "all" or empty matches everything
1543→ if f.is_empty() || f == "all" {
1544→ return true;
1545→ }
1546→ // Check creature types
1547→ for st in &perm.card.subtypes {
```
## Assistant
## Assistant
Now I have a full picture. Let me check Earth Rumble's Java source and read the existing test patterns.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards",
"pattern": "class EarthRumble"
}
```
## Assistant
**Result** (success):
```
Mage.Sets/src/mage/cards/e/EarthRumbleWrestlers.java:31:public final class EarthRumbleWrestlers extends CardImpl {
Mage.Sets/src/mage/cards/e/EarthRumble.java:22:public final class EarthRumble extends CardImpl {
Mage.Sets/src/mage/cards/e/EarthRumble.java:43:class EarthRumbleEffect extends OneShotEffect {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 200,
"offset": 1700
}
```
## Assistant
**Result** (success):
```
1700→
1701→ assert_eq!(game.state.players.len(), 2);
1702→ assert_eq!(game.state.player(p1).unwrap().life, 20);
1703→ assert_eq!(game.state.player(p2).unwrap().life, 20);
1704→ // Each player should have 40 cards in library
1705→ assert_eq!(game.state.player(p1).unwrap().library.len(), 40);
1706→ assert_eq!(game.state.player(p2).unwrap().library.len(), 40);
1707→ }
1708→
1709→ #[test]
1710→ fn game_runs_to_completion() {
1711→ let p1 = PlayerId::new();
1712→ let p2 = PlayerId::new();
1713→
1714→ let config = GameConfig {
1715→ players: vec![
1716→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
1717→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1718→ ],
1719→ starting_life: 20,
1720→ };
1721→
1722→ let mut game = Game::new_two_player(
1723→ config,
1724→ vec![
1725→ (p1, Box::new(AlwaysPassPlayer)),
1726→ (p2, Box::new(AlwaysPassPlayer)),
1727→ ],
1728→ );
1729→
1730→ // Both players always pass, so the game should eventually end by decking
1731→ let result = game.run();
1732→
1733→ // A player should have lost by drawing from an empty library
1734→ assert!(result.winner.is_some() || result.turn_number > 1);
1735→ }
1736→
1737→ #[test]
1738→ fn draw_cards_from_empty_library_causes_loss() {
1739→ let p1 = PlayerId::new();
1740→ let p2 = PlayerId::new();
1741→
1742→ // Give player 1 only 5 cards in deck
1743→ let mut small_deck = Vec::new();
1744→ for _ in 0..5 {
1745→ small_deck.push(make_basic_land("Forest", p1));
1746→ }
1747→
1748→ let config = GameConfig {
1749→ players: vec![
1750→ PlayerConfig { name: "Alice".to_string(), deck: small_deck },
1751→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1752→ ],
1753→ starting_life: 20,
1754→ };
1755→
1756→ let mut game = Game::new_two_player(
1757→ config,
1758→ vec![
1759→ (p1, Box::new(AlwaysPassPlayer)),
1760→ (p2, Box::new(AlwaysPassPlayer)),
1761→ ],
1762→ );
1763→
1764→ let result = game.run();
1765→
1766→ // Alice should lose from decking (only 5 cards, draws 7 opening hand)
1767→ assert_eq!(result.winner, Some(p2));
1768→ }
1769→
1770→ #[test]
1771→ fn counter_annihilation_applied() {
1772→ let p1 = PlayerId::new();
1773→ let p2 = PlayerId::new();
1774→
1775→ let config = GameConfig {
1776→ players: vec![
1777→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
1778→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1779→ ],
1780→ starting_life: 20,
1781→ };
1782→
1783→ let mut game = Game::new_two_player(
1784→ config,
1785→ vec![
1786→ (p1, Box::new(AlwaysPassPlayer)),
1787→ (p2, Box::new(AlwaysPassPlayer)),
1788→ ],
1789→ );
1790→
1791→ // Add a creature with both +1/+1 and -1/-1 counters
1792→ let card = make_creature("Test Bear", p1, 2, 2);
1793→ let card_id = card.id;
1794→ let mut perm = Permanent::new(card, p1);
1795→ perm.add_counters(crate::counters::CounterType::P1P1, 3);
1796→ perm.add_counters(crate::counters::CounterType::M1M1, 2);
1797→ game.state.battlefield.add(perm);
1798→
1799→ // Process SBAs
1800→ game.process_state_based_actions();
1801→
1802→ // After annihilation: 3 P1P1 - 2 M1M1 = 1 P1P1 remaining, 0 M1M1
1803→ let perm = game.state.battlefield.get(card_id).unwrap();
1804→ assert_eq!(perm.counters.get(&crate::counters::CounterType::P1P1), 1);
1805→ assert_eq!(perm.counters.get(&crate::counters::CounterType::M1M1), 0);
1806→ assert_eq!(perm.power(), 3); // 2 base + 1 from counter
1807→ assert_eq!(perm.toughness(), 3);
1808→ }
1809→
1810→ #[test]
1811→ fn legend_rule_applied() {
1812→ let p1 = PlayerId::new();
1813→ let p2 = PlayerId::new();
1814→
1815→ let config = GameConfig {
1816→ players: vec![
1817→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
1818→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1819→ ],
1820→ starting_life: 20,
1821→ };
1822→
1823→ let mut game = Game::new_two_player(
1824→ config,
1825→ vec![
1826→ (p1, Box::new(AlwaysPassPlayer)),
1827→ (p2, Box::new(AlwaysPassPlayer)),
1828→ ],
1829→ );
1830→
1831→ // Add two legendary permanents with the same name
1832→ let mut card1 = CardData::new(ObjectId::new(), p1, "Thalia");
1833→ card1.card_types = vec![CardType::Creature];
1834→ card1.supertypes = vec![crate::constants::SuperType::Legendary];
1835→ card1.power = Some(2);
1836→ card1.toughness = Some(1);
1837→ card1.keywords = KeywordAbilities::empty();
1838→ let id1 = card1.id;
1839→
1840→ let mut card2 = CardData::new(ObjectId::new(), p1, "Thalia");
1841→ card2.card_types = vec![CardType::Creature];
1842→ card2.supertypes = vec![crate::constants::SuperType::Legendary];
1843→ card2.power = Some(2);
1844→ card2.toughness = Some(1);
1845→ card2.keywords = KeywordAbilities::empty();
1846→
1847→ game.state.battlefield.add(Permanent::new(card1, p1));
1848→ game.state.battlefield.add(Permanent::new(card2, p1));
1849→
1850→ assert_eq!(game.state.battlefield.len(), 2);
1851→
1852→ // Process SBAs
1853→ game.process_state_based_actions();
1854→
1855→ // One should be removed by the legend rule
1856→ assert_eq!(game.state.battlefield.len(), 1);
1857→ // The first one should survive
1858→ assert!(game.state.battlefield.contains(id1));
1859→ }
1860→
1861→ #[test]
1862→ fn legal_actions_include_pass() {
1863→ let p1 = PlayerId::new();
1864→ let p2 = PlayerId::new();
1865→
1866→ let config = GameConfig {
1867→ players: vec![
1868→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
1869→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1870→ ],
1871→ starting_life: 20,
1872→ };
1873→
1874→ let game = Game::new_two_player(
1875→ config,
1876→ vec![
1877→ (p1, Box::new(AlwaysPassPlayer)),
1878→ (p2, Box::new(AlwaysPassPlayer)),
1879→ ],
1880→ );
1881→
1882→ let actions = game.compute_legal_actions(p1);
1883→ assert!(actions.contains(&PlayerAction::Pass));
1884→ }
1885→
1886→ #[test]
1887→ fn mana_ability_and_spell_cast() {
1888→ let p1 = PlayerId::new();
1889→ let p2 = PlayerId::new();
1890→
1891→ let config = GameConfig {
1892→ players: vec![
1893→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
1894→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
1895→ ],
1896→ starting_life: 20,
1897→ };
1898→
1899→ let mut game = Game::new_two_player(
```
## Assistant
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn boost_all_and_grant_keyword|fn discard_opponents_effect|fn add_counters_self_when_no_targets|fn framework_create_token"
}
```
## Assistant
**Result** (success):
```
2335: fn add_counters_self_when_no_targets() {
2414: fn discard_opponents_effect() {
2458: fn boost_all_and_grant_keyword_all_until_eot() {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 200,
"offset": 2335
}
```
## Assistant
**Result** (success):
```
2335→ fn add_counters_self_when_no_targets() {
2336→ let p1 = PlayerId::new();
2337→ let p2 = PlayerId::new();
2338→
2339→ let config = GameConfig {
2340→ players: vec![
2341→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
2342→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
2343→ ],
2344→ starting_life: 20,
2345→ };
2346→
2347→ let mut game = Game::new_two_player(
2348→ config,
2349→ vec![
2350→ (p1, Box::new(AlwaysPassPlayer)),
2351→ (p2, Box::new(AlwaysPassPlayer)),
2352→ ],
2353→ );
2354→
2355→ // Add a creature to the battlefield
2356→ let source_id = ObjectId::new();
2357→ let mut card = CardData::new(source_id, p1, "Blight Creature");
2358→ card.card_types = vec![CardType::Creature];
2359→ card.power = Some(3);
2360→ card.toughness = Some(7);
2361→ card.keywords = KeywordAbilities::empty();
2362→ game.state.battlefield.add(Permanent::new(card, p1));
2363→
2364→ // Execute AddCounters with no targets but with source — should add to self
2365→ game.execute_effects(
2366→ &[Effect::add_counters("-1/-1", 2)],
2367→ p1,
2368→ &[],
2369→ Some(source_id),
2370→ );
2371→
2372→ let perm = game.state.battlefield.get(source_id).unwrap();
2373→ assert_eq!(perm.counters.get(&CounterType::M1M1), 2);
2374→
2375→ // Execute RemoveCounters with no targets but with source — should remove from self
2376→ game.execute_effects(
2377→ &[Effect::RemoveCounters { counter_type: "-1/-1".into(), count: 1 }],
2378→ p1,
2379→ &[],
2380→ Some(source_id),
2381→ );
2382→
2383→ let perm = game.state.battlefield.get(source_id).unwrap();
2384→ assert_eq!(perm.counters.get(&CounterType::M1M1), 1);
2385→ }
2386→
2387→ /// A decision maker that actually discards when asked.
2388→ struct DiscardingPlayer;
2389→
2390→ impl PlayerDecisionMaker for DiscardingPlayer {
2391→ fn priority(&mut self, _game: &GameView<'_>, _legal: &[PlayerAction]) -> PlayerAction {
2392→ PlayerAction::Pass
2393→ }
2394→ fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
2395→ fn choose_use(&mut self, _: &GameView<'_>, _: Outcome, _: &str) -> bool { false }
2396→ fn choose_mode(&mut self, _: &GameView<'_>, _: &[NamedChoice]) -> usize { 0 }
2397→ fn select_attackers(&mut self, _: &GameView<'_>, _: &[ObjectId], _: &[ObjectId]) -> Vec<(ObjectId, ObjectId)> { vec![] }
2398→ fn select_blockers(&mut self, _: &GameView<'_>, _: &[AttackerInfo]) -> Vec<(ObjectId, ObjectId)> { vec![] }
2399→ fn assign_damage(&mut self, _: &GameView<'_>, _: &DamageAssignment) -> Vec<(ObjectId, u32)> { vec![] }
2400→ fn choose_mulligan(&mut self, _: &GameView<'_>, _: &[ObjectId]) -> bool { false }
2401→ fn choose_cards_to_put_back(&mut self, _: &GameView<'_>, _: &[ObjectId], _: usize) -> Vec { vec![] }
2402→ fn choose_discard(&mut self, _: &GameView<'_>, hand: &[ObjectId], count: usize) -> Vec {
2403→ // Actually discard from the back of hand
2404→ hand.iter().rev().take(count).copied().collect()
2405→ }
2406→ fn choose_amount(&mut self, _: &GameView<'_>, _: &str, min: u32, _: u32) -> u32 { min }
2407→ fn choose_mana_payment(&mut self, _: &GameView<'_>, _: &UnpaidMana, _: &[PlayerAction]) -> Option { None }
2408→ fn choose_replacement_effect(&mut self, _: &GameView<'_>, _: &[ReplacementEffectChoice]) -> usize { 0 }
2409→ fn choose_pile(&mut self, _: &GameView<'_>, _: Outcome, _: &str, _: &[ObjectId], _: &[ObjectId]) -> bool { true }
2410→ fn choose_option(&mut self, _: &GameView<'_>, _: Outcome, _: &str, _: &[NamedChoice]) -> usize { 0 }
2411→ }
2412→
2413→ #[test]
2414→ fn discard_opponents_effect() {
2415→ let p1 = PlayerId::new();
2416→ let p2 = PlayerId::new();
2417→
2418→ let config = GameConfig {
2419→ players: vec![
2420→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
2421→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
2422→ ],
2423→ starting_life: 20,
2424→ };
2425→
2426→ let mut game = Game::new_two_player(
2427→ config,
2428→ vec![
2429→ (p1, Box::new(AlwaysPassPlayer)),
2430→ (p2, Box::new(DiscardingPlayer)),
2431→ ],
2432→ );
2433→
2434→ // Give opponent some cards in hand
2435→ let c1_id = ObjectId::new();
2436→ let c2_id = ObjectId::new();
2437→ let c3_id = ObjectId::new();
2438→ if let Some(player) = game.state.players.get_mut(&p2) {
2439→ player.hand.add(c1_id);
2440→ player.hand.add(c2_id);
2441→ player.hand.add(c3_id);
2442→ }
2443→
2444→ let p1_hand_before = game.state.players.get(&p1).unwrap().hand.len();
2445→ let p2_hand_before = game.state.players.get(&p2).unwrap().hand.len();
2446→ assert_eq!(p2_hand_before, 3);
2447→
2448→ // Each opponent discards 1
2449→ game.execute_effects(&[Effect::discard_opponents(1)], p1, &[], None);
2450→
2451→ // Controller's hand unchanged
2452→ assert_eq!(game.state.players.get(&p1).unwrap().hand.len(), p1_hand_before);
2453→ // Opponent lost 1 card
2454→ assert_eq!(game.state.players.get(&p2).unwrap().hand.len(), 2);
2455→ }
2456→
2457→ #[test]
2458→ fn boost_all_and_grant_keyword_all_until_eot() {
2459→ let p1 = PlayerId::new();
2460→ let p2 = PlayerId::new();
2461→
2462→ let config = GameConfig {
2463→ players: vec![
2464→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
2465→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
2466→ ],
2467→ starting_life: 20,
2468→ };
2469→
2470→ let mut game = Game::new_two_player(
2471→ config,
2472→ vec![
2473→ (p1, Box::new(AlwaysPassPlayer)),
2474→ (p2, Box::new(AlwaysPassPlayer)),
2475→ ],
2476→ );
2477→
2478→ // Put two creatures on P1's battlefield and one on P2's
2479→ let bear1 = make_creature("Grizzly Bears", p1, 2, 2);
2480→ let bear1_id = bear1.id;
2481→ let bear2 = make_creature("Runeclaw Bear", p1, 2, 2);
2482→ let bear2_id = bear2.id;
2483→ let opp_bear = make_creature("Opponent Bear", p2, 2, 2);
2484→ let opp_bear_id = opp_bear.id;
2485→
2486→ game.state.battlefield.add(Permanent::new(bear1, p1));
2487→ game.state.battlefield.add(Permanent::new(bear2, p1));
2488→ game.state.battlefield.add(Permanent::new(opp_bear, p2));
2489→
2490→ // Boost all creatures P1 controls +1/+1
2491→ game.execute_effects(
2492→ &[Effect::boost_all_eot("creatures you control", 1, 1)],
2493→ p1, &[], None,
2494→ );
2495→
2496→ // P1's creatures should be 3/x, opponent's should remain 2/x
2497→ assert_eq!(game.state.battlefield.get(bear1_id).unwrap().power(), 3);
2498→ assert_eq!(game.state.battlefield.get(bear2_id).unwrap().power(), 3);
2499→ assert_eq!(game.state.battlefield.get(opp_bear_id).unwrap().power(), 2);
2500→
2501→ // Grant trample to all creatures P1 controls
2502→ game.execute_effects(
2503→ &[Effect::grant_keyword_all_eot("creatures you control", "trample")],
2504→ p1, &[], None,
2505→ );
2506→
2507→ // P1's creatures should have trample, opponent's should not
2508→ assert!(game.state.battlefield.get(bear1_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
2509→ assert!(game.state.battlefield.get(bear2_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
2510→ assert!(!game.state.battlefield.get(opp_bear_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
2511→ }
2512→}
2513→
```
## Assistant
## Assistant
Let me check how `Permanent::power()` and `apply_damage()` work.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/permanent.rs",
"pattern": "pub fn power|pub fn apply_damage|fn is_creature"
}
```
## Assistant
**Result** (success):
```
84: pub fn is_creature(&self) -> bool {
190: pub fn power(&self) -> i32 {
254: pub fn apply_damage(&mut self, amount: u32) -> u32 {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/permanent.rs",
"limit": 25,
"offset": 190
}
```
## Assistant
**Result** (success):
```
190→ pub fn power(&self) -> i32 {
191→ let base = self.card.power.unwrap_or(0);
192→ let (counter_p, _) = self.counters.pt_modification();
193→ base + counter_p
194→ }
195→
196→ /// Get the current toughness, including counter modifications.
197→ pub fn toughness(&self) -> i32 {
198→ let base = self.card.toughness.unwrap_or(0);
199→ let (_, counter_t) = self.counters.pt_modification();
200→ base + counter_t
201→ }
202→
203→ /// Remaining toughness after damage (used for SBA lethal damage check).
204→ pub fn remaining_toughness(&self) -> i32 {
205→ self.toughness() - self.damage as i32
206→ }
207→
208→ /// Whether this creature has lethal damage marked on it.
209→ pub fn has_lethal_damage(&self) -> bool {
210→ self.is_creature() && self.remaining_toughness() <= 0
211→ }
212→
213→ // ── Tap/Untap ──────────────────────────────────────────────────────
214→
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/permanent.rs",
"limit": 20,
"offset": 254
}
```
## Assistant
**Result** (success):
```
254→ pub fn apply_damage(&mut self, amount: u32) -> u32 {
255→ if amount == 0 {
256→ return 0;
257→ }
258→ self.damage += amount;
259→ amount
260→ }
261→
262→ /// Remove all damage from this permanent (happens during cleanup step).
263→ pub fn clear_damage(&mut self) {
264→ self.damage = 0;
265→ }
266→
267→ // ── Counters ───────────────────────────────────────────────────────
268→
269→ /// Add counters to this permanent.
270→ pub fn add_counters(&mut self, counter_type: CounterType, count: u32) {
271→ self.counters.add(counter_type, count);
272→ }
273→
```
## Assistant
Good. Now I have everything I need. Let me implement the batch. I'll:
1. Add `Effect::Fight` and `Effect::Bite` variants + constructors
2. Add match arms in `execute_effects`
3. Add a test
4. Fix the cards
5. Verify with `cargo check` and `cargo test`
Let me start with the engine changes.
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"new_string": " // -- Combat --\n /// Target creature can't block this turn.\n CantBlock,\n /// Target creature must block this turn.\n MustBlock,\n /// Prevent combat damage.\n PreventCombatDamage,\n /// Fight — source creature and target creature each deal damage equal\n /// to their power to each other.\n Fight,\n /// Bite — source creature deals damage equal to its power to target\n /// creature (one-way; the target does not deal damage back).\n Bite,",
"old_string": " // -- Combat --\n /// Target creature can't block this turn.\n CantBlock,\n /// Target creature must block this turn.\n MustBlock,\n /// Prevent combat damage.\n PreventCombatDamage,",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs has been updated successfully.
```
## Assistant
Now add the constructors:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"new_string": " /// \"This creature fights target creature.\" (mutual damage)\n pub fn fight() -> Self {\n Effect::Fight\n }\n\n /// \"This creature deals damage equal to its power to target.\" (one-way)\n pub fn bite() -> Self {\n Effect::Bite\n }\n\n /// \"Set power and toughness.\"\n pub fn set_pt(power: i32, toughness: i32) -> Self {",
"old_string": " /// \"Set power and toughness.\"\n pub fn set_pt(power: i32, toughness: i32) -> Self {",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs has been updated successfully.
```
## Assistant
Now add the match arms in `execute_effects` in game.rs. I'll add them right before the `_ =>` catch-all.
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " Effect::Fight => {\n // Fight: source creature and target creature each deal damage\n // equal to their power to each other.\n // Determine \"your creature\" (fighter):\n // - If source is a creature on the battlefield, use it\n // - Otherwise, pick controller's creature with highest power\n // Determine \"their creature\" (target):\n // - First target on the battlefield\n // - If no targets, pick opponent's creature with highest power\n let fighter_id = Self::find_fight_creature(&self.state, source, controller);\n let target_id = Self::find_fight_target(&self.state, targets, controller);\n\n if let (Some(fid), Some(tid)) = (fighter_id, target_id) {\n if fid != tid {\n // Read both powers first\n let fighter_power = self.state.battlefield.get(fid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n let target_power = self.state.battlefield.get(tid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n // Apply damage: fighter deals its power to target\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(fighter_power);\n }\n // Apply damage: target deals its power to fighter\n if let Some(fighter_perm) = self.state.battlefield.get_mut(fid) {\n fighter_perm.apply_damage(target_power);\n }\n }\n }\n }\n Effect::Bite => {\n // Bite: source creature deals damage equal to its power to target\n // creature (one-way; the target does not deal damage back).\n let biter_id = Self::find_fight_creature(&self.state, source, controller);\n let target_id = Self::find_fight_target(&self.state, targets, controller);\n\n if let (Some(bid), Some(tid)) = (biter_id, target_id) {\n if bid != tid {\n let biter_power = self.state.battlefield.get(bid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(biter_power);\n }\n }\n }\n }\n _ => {\n // Remaining effects not yet implemented (gain control, protection, etc.)\n }",
"old_string": " _ => {\n // Remaining effects not yet implemented (gain control, protection, etc.)\n }",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now I need to add the helper methods `find_fight_creature` and `find_fight_target`. Let me add them near the other helper methods like `matches_filter`.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 30,
"offset": 1550
}
```
## Assistant
**Result** (success):
```
1550→ // Find end of toughness (next space or end)
1551→ let after_slash = &name[slash_pos + 1..];
1552→ let t_end = after_slash.find(' ').unwrap_or(after_slash.len());
1553→ if let Ok(t) = after_slash[..t_end].parse::() {
1554→ power = p;
1555→ toughness = t;
1556→ if t_end < after_slash.len() {
1557→ &after_slash[t_end + 1..]
1558→ } else {
1559→ ""
1560→ }
1561→ } else {
1562→ name
1563→ }
1564→ } else {
1565→ name
1566→ }
1567→ } else {
1568→ name
1569→ };
1570→
1571→ // Parse "with keyword1[, keyword2...]" or "with keyword1 and keyword2"
1572→ if let Some(with_pos) = rest.to_lowercase().find("with ") {
1573→ let kw_str = &rest[with_pos + 5..];
1574→ for part in kw_str.split(|c: char| c == ',' || c == '&') {
1575→ let part = part.trim().trim_start_matches("and ").trim();
1576→ if let Some(kw) = crate::constants::KeywordAbilities::keyword_from_name(part) {
1577→ keywords |= kw;
1578→ }
1579→ }
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn matches_filter\\(perm"
}
```
## Assistant
**Result** (success):
```
1586: fn matches_filter(perm: &Permanent, filter: &str) -> bool {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 60,
"offset": 1585
}
```
## Assistant
**Result** (success):
```
1585→ /// Check if a permanent matches a simple filter string.
1586→ fn matches_filter(perm: &Permanent, filter: &str) -> bool {
1587→ let f = filter.to_lowercase();
1588→ // "all" or empty matches everything
1589→ if f.is_empty() || f == "all" {
1590→ return true;
1591→ }
1592→ // Check creature types
1593→ for st in &perm.card.subtypes {
1594→ if f.contains(&st.to_string().to_lowercase()) {
1595→ return true;
1596→ }
1597→ }
1598→ // Check card types
1599→ for ct in &perm.card.card_types {
1600→ let ct_name = format!("{:?}", ct).to_lowercase();
1601→ if f.contains(&ct_name) {
1602→ return true;
1603→ }
1604→ }
1605→ // "nonland" filter
1606→ if f.contains("nonland") && !perm.card.card_types.contains(&crate::constants::CardType::Land) {
1607→ return true;
1608→ }
1609→ false
1610→ }
1611→
1612→ /// Check if a CardData matches a simple filter string.
1613→ fn card_matches_filter(card: &CardData, filter: &str) -> bool {
1614→ let f = filter.to_lowercase();
1615→ if f.is_empty() || f == "all" {
1616→ return true;
1617→ }
1618→ // Check "basic land"
1619→ if f.contains("basic") && f.contains("land") {
1620→ return card.supertypes.contains(&crate::constants::SuperType::Basic)
1621→ && card.card_types.contains(&crate::constants::CardType::Land);
1622→ }
1623→ // Check card types
1624→ for ct in &card.card_types {
1625→ let ct_name = format!("{:?}", ct).to_lowercase();
1626→ if f.contains(&ct_name) {
1627→ return true;
1628→ }
1629→ }
1630→ // Check subtypes
1631→ for st in &card.subtypes {
1632→ if f.contains(&st.to_string().to_lowercase()) {
1633→ return true;
1634→ }
1635→ }
1636→ false
1637→ }
1638→
1639→ /// Check if the game should end and return a result if so.
1640→ fn check_game_end(&self) -> Option {
1641→ if !self.state.should_end() {
1642→ return None;
1643→ }
1644→
```
## Assistant
Now I'll add the fight helper methods right after `card_matches_filter`:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " /// Find the \"fighter\" creature for Fight/Bite effects.\n /// If source is a creature on the battlefield, use it.\n /// Otherwise, pick controller's creature with highest power.\n fn find_fight_creature(\n state: &GameState,\n source: Option,\n controller: PlayerId,\n ) -> Option {\n // Check if source is a creature on the battlefield\n if let Some(sid) = source {\n if let Some(perm) = state.battlefield.get(sid) {\n if perm.is_creature() {\n return Some(sid);\n }\n }\n }\n // Fallback: pick controller's creature with highest power\n state\n .battlefield\n .iter()\n .filter(|p| p.controller == controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id())\n }\n\n /// Find the fight/bite target creature.\n /// If targets contains a creature on the battlefield, use the first one.\n /// Otherwise, pick the strongest opponent creature.\n fn find_fight_target(\n state: &GameState,\n targets: &[ObjectId],\n controller: PlayerId,\n ) -> Option {\n // Check if any target is a creature on the battlefield\n for &tid in targets {\n if let Some(perm) = state.battlefield.get(tid) {\n if perm.is_creature() {\n return Some(tid);\n }\n }\n }\n // Fallback: pick opponent's creature with highest power\n state\n .battlefield\n .iter()\n .filter(|p| p.controller != controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id())\n }\n\n /// Check if the game should end and return a result if so.\n fn check_game_end(&self) -> Option {",
"old_string": " /// Check if the game should end and return a result if so.\n fn check_game_end(&self) -> Option {",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now let me add the test. I'll add it right before the closing `}` of the tests module:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "assert!\\(!game.state.battlefield.get\\(opp_bear_id\\)"
}
```
## Assistant
**Result** (success):
```
2606: assert!(!game.state.battlefield.get(opp_bear_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 10,
"offset": 2605
}
```
## Assistant
**Result** (success):
```
2605→ assert!(game.state.battlefield.get(bear2_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
2606→ assert!(!game.state.battlefield.get(opp_bear_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));
2607→ }
2608→}
2609→
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " assert!(!game.state.battlefield.get(opp_bear_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));\n }\n\n #[test]\n fn fight_and_bite_effects() {\n let p1 = PlayerId::new();\n let p2 = PlayerId::new();\n\n let config = GameConfig {\n players: vec![\n PlayerConfig { name: \"Alice\".to_string(), deck: make_deck(p1) },\n PlayerConfig { name: \"Bob\".to_string(), deck: make_deck(p2) },\n ],\n starting_life: 20,\n };\n\n let mut game = Game::new_two_player(\n config,\n vec![\n (p1, Box::new(AlwaysPassPlayer)),\n (p2, Box::new(AlwaysPassPlayer)),\n ],\n );\n\n // Set up: P1 has a 4/4, P2 has a 3/5\n let fighter = make_creature(\"Fighter\", p1, 4, 4);\n let fighter_id = fighter.id;\n let target = make_creature(\"Target\", p2, 3, 5);\n let target_id = target.id;\n\n game.state.battlefield.add(Permanent::new(fighter, p1));\n game.state.battlefield.add(Permanent::new(target, p2));\n\n // Fight: mutual damage — fighter (4 power) vs target (3 power)\n game.execute_effects(\n &[Effect::fight()],\n p1,\n &[target_id],\n Some(fighter_id),\n );\n\n // Fighter took 3 damage (from target's 3 power): 4 toughness - 3 = 1 remaining\n let f = game.state.battlefield.get(fighter_id).unwrap();\n assert_eq!(f.remaining_toughness(), 1);\n // Target took 4 damage (from fighter's 4 power): 5 toughness - 4 = 1 remaining\n let t = game.state.battlefield.get(target_id).unwrap();\n assert_eq!(t.remaining_toughness(), 1);\n\n // Clear damage for next test\n game.state.battlefield.get_mut(fighter_id).unwrap().clear_damage();\n game.state.battlefield.get_mut(target_id).unwrap().clear_damage();\n\n // Bite: one-way damage — fighter deals 4 to target, target deals nothing back\n game.execute_effects(\n &[Effect::bite()],\n p1,\n &[target_id],\n Some(fighter_id),\n );\n\n // Fighter should have no damage\n let f = game.state.battlefield.get(fighter_id).unwrap();\n assert_eq!(f.remaining_toughness(), 4);\n // Target took 4 damage: 5 toughness - 4 = 1 remaining\n let t = game.state.battlefield.get(target_id).unwrap();\n assert_eq!(t.remaining_toughness(), 1);\n }\n\n #[test]\n fn fight_auto_selects_creatures() {\n let p1 = PlayerId::new();\n let p2 = PlayerId::new();\n\n let config = GameConfig {\n players: vec![\n PlayerConfig { name: \"Alice\".to_string(), deck: make_deck(p1) },\n PlayerConfig { name: \"Bob\".to_string(), deck: make_deck(p2) },\n ],\n starting_life: 20,\n };\n\n let mut game = Game::new_two_player(\n config,\n vec![\n (p1, Box::new(AlwaysPassPlayer)),\n (p2, Box::new(AlwaysPassPlayer)),\n ],\n );\n\n // P1 has a 2/2 and a 5/5; P2 has a 3/3\n let small = make_creature(\"Small Bear\", p1, 2, 2);\n let big = make_creature(\"Big Bear\", p1, 5, 5);\n let big_id = big.id;\n let opp = make_creature(\"Opponent Bear\", p2, 3, 3);\n let opp_id = opp.id;\n\n game.state.battlefield.add(Permanent::new(small, p1));\n game.state.battlefield.add(Permanent::new(big, p1));\n game.state.battlefield.add(Permanent::new(opp, p2));\n\n // Fight with no source, no targets — auto-selects strongest on each side\n game.execute_effects(&[Effect::fight()], p1, &[], None);\n\n // P1's 5/5 should fight P2's 3/3\n // Big bear: 5 toughness - 3 damage = 2 remaining\n let b = game.state.battlefield.get(big_id).unwrap();\n assert_eq!(b.remaining_toughness(), 2);\n // Opponent bear: 3 toughness - 5 damage = lethal\n let o = game.state.battlefield.get(opp_id).unwrap();\n assert!(o.has_lethal_damage());\n }\n}",
"old_string": " assert!(!game.state.battlefield.get(opp_bear_id).unwrap().has_keyword(KeywordAbilities::TRAMPLE));\n }\n}",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now let me check that the engine compiles before fixing cards:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cd /mnt/dest-btrfs/home/jc/src/mage/mtg-rl && cargo check -p mtg-engine 2>&1",
"description": "Check engine compiles",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Checking mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.10s
```
## Assistant
Engine compiles. Now let me fix the cards. Let me fix them all with sed:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test -p mtg-engine --lib -- fight_and_bite_effects fight_auto_selects_creatures 2>&1",
"description": "Run fight/bite tests",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Compiling mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Finished `test` profile [unoptimized + debuginfo] target(s) in 2.06s
Running unittests src/lib.rs (target/debug/deps/mtg_engine-fa37b04e04026fe5)
running 2 tests
test game::tests::fight_and_bite_effects ... ok
test game::tests::fight_auto_selects_creatures ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 161 filtered out; finished in 0.00s
```
## Assistant
Tests pass. Now let me fix the cards. Let me fix each one:
**1. FDN: Bite Down** — pure bite spell
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's|vec!\\[Effect::Custom(\"Target creature you control deals damage equal to its power to target creature or planeswalker you don'\\''t control.\".into())\\]|vec![Effect::bite()]|' mtg-cards/src/sets/fdn.rs",
"description": "Fix Bite Down in FDN"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
**2. FDN: Affectionate Indrik** — ETB fight trigger
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 15,
"offset": 5245
}
```
## Assistant
**Result** (success):
```
5245→ CardData { id, owner, name: "Affectionate Indrik".into(), mana_cost: ManaCost::parse("{5}{G}"),
5246→ card_types: vec![CardType::Creature],
5247→ subtypes: vec![SubType::Beast],
5248→ power: Some(4), toughness: Some(4),
5249→ rarity: Rarity::Common,
5250→ abilities: vec![
5251→ Ability::triggered(id,
5252→ "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5253→ vec![EventType::EnteredTheBattlefield],
5254→ vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
5255→ TargetSpec::None),
5256→ ],
5257→ ..Default::default() }
5258→}
5259→
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's|vec!\\[Effect::Custom(\"When Affectionate Indrik enters the battlefield, you may have it fight target creature you don'\\''t control.\".into())\\],|vec![Effect::fight()],|' mtg-cards/src/sets/fdn.rs && sed -i 's|TargetSpec::None),|TargetSpec::Creature),|' mtg-cards/src/sets/fdn.rs",
"description": "Fix Affectionate Indrik"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Wait, `sed` replacing `TargetSpec::None),` could hit many places. Let me check.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"TargetSpec::Creature),\" mtg-cards/src/sets/fdn.rs | head -20",
"description": "Check TargetSpec changes"
}
```
## Assistant
**Result** (success):
```
618: TargetSpec::Creature),
631: TargetSpec::Creature),
657: TargetSpec::Creature),
680: TargetSpec::Creature),
693: TargetSpec::Creature),
721: TargetSpec::Creature),
735: TargetSpec::Creature),
767: TargetSpec::Creature),
780: TargetSpec::Creature),
817: TargetSpec::Creature),
838: TargetSpec::Creature),
851: TargetSpec::Creature),
872: TargetSpec::Creature),
886: TargetSpec::Creature),
926: TargetSpec::Creature),
942: TargetSpec::Creature),
969: TargetSpec::Creature),
995: TargetSpec::Creature),
1010: TargetSpec::Creature),
1027: TargetSpec::Creature),
```
## Assistant
That `sed` replaced ALL `TargetSpec::None),` with `TargetSpec::Creature),` — that's a disaster. Let me undo that.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "git checkout mtg-cards/src/sets/fdn.rs",
"description": "Revert fdn.rs"
}
```
## Assistant
**Result** (success):
```
Updated 1 path from the index
```
## Assistant
Let me be much more careful with the edits. I'll use specific context in sed or read/edit individual cards.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's|vec!\\[Effect::Custom(\"Target creature you control deals damage equal to its power to target creature or planeswalker you don'\\''t control.\".into())\\]|vec![Effect::bite()]|' mtg-cards/src/sets/fdn.rs",
"description": "Fix Bite Down in FDN"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Now for Affectionate Indrik, I need to change both the Effect and the TargetSpec on surrounding lines. Let me use a more precise approach:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Affectionate Indrik\" mtg-cards/src/sets/fdn.rs",
"description": "Find Affectionate Indrik lines"
}
```
## Assistant
**Result** (success):
```
382: registry.register("Affectionate Indrik", affectionate_indrik, "FDN");
5243: CardData { id, owner, name: "Affectionate Indrik".into(), mana_cost: ManaCost::parse("{5}{G}"),
5250: "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5252: vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 10,
"offset": 5248
}
```
## Assistant
**Result** (success):
```
5248→ abilities: vec![
5249→ Ability::triggered(id,
5250→ "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5251→ vec![EventType::EnteredTheBattlefield],
5252→ vec![Effect::Custom("When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.".into())],
5253→ TargetSpec::None),
5254→ ],
5255→ ..Default::default() }
5256→}
5257→
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i '5252s|.*| vec![Effect::fight()],|' mtg-cards/src/sets/fdn.rs && sed -i '5253s|TargetSpec::None|TargetSpec::Creature|' mtg-cards/src/sets/fdn.rs",
"description": "Fix Affectionate Indrik effect and target"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
**3. FDN: Felling Blow** — +1/+1 counter + bite
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Felling Blow\" mtg-cards/src/sets/fdn.rs",
"description": "Find Felling Blow lines"
}
```
## Assistant
**Result** (success):
```
490: registry.register("Felling Blow", felling_blow, "FDN");
6012: CardData { id, owner, name: "Felling Blow".into(), mana_cost: ManaCost::parse("{2}{G}"),
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 12,
"offset": 6012
}
```
## Assistant
**Result** (success):
```
6012→ CardData { id, owner, name: "Felling Blow".into(), mana_cost: ManaCost::parse("{2}{G}"),
6013→ card_types: vec![CardType::Sorcery],
6014→ rarity: Rarity::Common,
6015→ abilities: vec![
6016→ Ability::spell(id,
6017→ vec![Effect::Custom("Put a +1/+1 counter on target creature you control. Then that creature deals damage equal to its power to target creature an opponent controls.".into())],
6018→ TargetSpec::None),
6019→ ],
6020→ ..Default::default() }
6021→}
6022→
6023→fn fiery_annihilation(id: ObjectId, owner: PlayerId) -> CardData {
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i '6017s|.*| vec![Effect::add_p1p1_counters(1), Effect::bite()],|' mtg-cards/src/sets/fdn.rs && sed -i '6018s|TargetSpec::None|TargetSpec::Creature|' mtg-cards/src/sets/fdn.rs",
"description": "Fix Felling Blow"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
**4. ECL: Assert Perfection** — boost + fight
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/ecl.rs",
"limit": 8,
"offset": 1795
}
```
## Assistant
**Result** (success):
```
1795→fn assert_perfection(id: ObjectId, owner: PlayerId) -> CardData {
1796→ // Sorcery {1}{G}. Target creature +1/+0, then fights opponent's creature.
1797→ CardData { id, owner, name: "Assert Perfection".into(), mana_cost: ManaCost::parse("{1}{G}"),
1798→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1799→ abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::Custom("It fights target creature you don't control.".into())], TargetSpec::Creature)],
1800→ ..Default::default() }
1801→}
1802→
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i \"s|Effect::Custom(\\\"It fights target creature you don't control.\\\".into())|Effect::fight()|\" mtg-cards/src/sets/ecl.rs",
"description": "Fix Assert Perfection in ECL"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
**5. TDM: Piercing Exhale** — pure fight
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i \"s|Effect::Custom(\\\"Target creature you control fights target creature you don't control.\\\".into())|Effect::fight()|g\" mtg-cards/src/sets/tdm.rs",
"description": "Fix fight cards in TDM (Piercing Exhale + Knockout Maneuver)"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
That should have fixed both Piercing Exhale (pure fight) and Knockout Maneuver (counter + fight). Let me verify:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"fight\\|bite\\|Fight\\|Bite\" mtg-cards/src/sets/tdm.rs | head -20",
"description": "Verify TDM fight fixes"
}
```
## Assistant
**Result** (success):
```
259: registry.register("Teval, Arbiter of Virtue", teval_arbiter_of_virtue, "TDM");
1212: // Sorcery {2/G}{2/U}{2/R}. Double P/T of your creature, then fight.
1215: abilities: vec![Ability::spell(id, vec![Effect::Custom("Double target creature's P/T, then it fights target creature you don't control.".into())], TargetSpec::Creature)],
1228: // Sorcery {2}{G}. +1/+1 counter on your creature, then it fights opponent's creature.
1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::Creature)],
1252: // Instant {1}{G}. Behold Dragon. Your creature fights target. If beheld, surveil 2.
1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::Creature)],
3522:fn teval_arbiter_of_virtue(id: ObjectId, owner: PlayerId) -> CardData {
3523: CardData { id, owner, name: "Teval, Arbiter of Virtue".into(),
```
## Assistant
Lines 1231 (Knockout Maneuver) and 1255 (Piercing Exhale) are fixed. Dragonclaw Strike (1215) is still Custom (expected — it has "double P/T" which we can't implement).
Now let me check if there are any remaining fight customs to handle:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Custom.*fight\\|Custom.*deals damage equal to its power\" mtg-cards/src/sets/fdn.rs mtg-cards/src/sets/ecl.rs mtg-cards/src/sets/tdm.rs mtg-cards/src/sets/tla.rs",
"description": "Check remaining fight/bite customs"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/fdn.rs:3007: vec![Effect::Custom("Choose one: Search for basic land; or target creature you control fights target creature you don't control.".into())],
mtg-cards/src/sets/fdn.rs:6796: vec![Effect::Custom("Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don’t control.".into())],
mtg-cards/src/sets/ecl.rs:2173: vec![Effect::Custom("Choose two: copy target Kithkin you control; target player creates 1/1 Kithkin token; target creature +3/+3 until EOT; target creature you control fights target creature an opponent controls.".into())],
mtg-cards/src/sets/tdm.rs:1215: abilities: vec![Ability::spell(id, vec![Effect::Custom("Double target creature's P/T, then it fights target creature you don't control.".into())], TargetSpec::Creature)],
mtg-cards/src/sets/tdm.rs:2995: vec![Effect::Custom("Target Dragon you control deals damage equal to its power to any target.".into())],
```
## Assistant
Good. The remaining ones are:
- FDN: "Choose one..." — modal (Batch 11)
- FDN: Primal Might — X-cost (Batch 15)
- ECL: "Choose two..." — modal (Batch 11)
- TDM: Dragonclaw Strike — double P/T (too complex)
- TDM: Dragon land — bite with dragon-specific targeting (custom target)
These are all correctly deferred. Let me compile and test:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo check -p mtg-cards 2>&1",
"description": "Check mtg-cards compiles",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Checking mtg-cards v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.80s
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test --lib 2>&1",
"description": "Run all lib tests",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Compiling mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Compiling mtg-cards v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards)
Compiling mtg-ai v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai)
warning: fields `action` and `depth` are never read
--> mtg-ai/src/minimax_player.rs:62:5
|
60 | struct SearchNode {
| ---------- fields in this struct
61 | /// The action that led to this node (None for root).
62 | action: Option,
| ^^^^^^
...
70 | depth: u32,
| ^^^^^
|
= note: `SearchNode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
warning: associated functions `new_root` and `new_child` are never used
--> mtg-ai/src/minimax_player.rs:74:8
|
73 | impl SearchNode {
| --------------- associated functions in this implementation
74 | fn new_root(is_maximizing: bool) -> Self {
| ^^^^^^^^
...
84 | fn new_child(action: PlayerAction, depth: u32, is_maximizing: bool) -> Self {
| ^^^^^^^^^
warning: `mtg-ai` (lib) generated 2 warnings
Compiling mtg-python v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-python)
Compiling mtg-tests v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-tests)
warning: `mtg-ai` (lib test) generated 1 warning (1 duplicate)
Finished `test` profile [unoptimized + debuginfo] target(s) in 3.90s
Running unittests src/lib.rs (target/debug/deps/mtg_ai-a3cefc6981511e97)
running 52 tests
test action_space::tests::action_mask_pass_only ... ok
test action_space::tests::phase1_activate_ability_roundtrip ... ok
test action_space::tests::action_mask_with_castable_spell ... ok
test action_space::tests::phase1_cast_spell_roundtrip ... ok
test action_space::tests::phase1_out_of_range_returns_none ... ok
test action_space::tests::phase1_pass_roundtrip ... ok
test action_space::tests::phase1_play_land_roundtrip ... ok
test action_space::tests::phase1_all_indices_are_unique ... ok
test action_space::tests::phase2_roundtrip ... ok
test action_space::tests::reward_intermediate_negative_when_losing_advantage ... ok
test action_space::tests::reward_intermediate_positive_when_gaining_advantage ... ok
test action_space::tests::reward_loss_is_negative ... ok
test evaluator::tests::creature_permanent_scores_positively ... ok
test action_space::tests::reward_win_is_positive ... ok
test evaluator::tests::equal_board_state_scores_zero ... ok
test evaluator::tests::flying_creature_scores_higher ... ok
test evaluator::tests::keyword_scores_are_reasonable ... ok
test evaluator::tests::life_score_above_20 ... ok
test evaluator::tests::life_score_lookup_table ... ok
test evaluator::tests::loss_state_gives_min_score ... ok
test evaluator::tests::more_life_is_better ... ok
test evaluator::tests::win_state_gives_max_score ... ok
test gym::tests::env_action_mask_has_correct_size ... ok
test gym::tests::env_reset_returns_correct_size_observation ... ok
test gym::tests::env_space_sizes ... ok
test gym::tests::env_step_returns_valid_result ... ok
test heuristic_player::tests::heuristic_attacks_with_all ... ok
test gym::tests::env_truncates_at_max_turns ... ok
test heuristic_player::tests::heuristic_choose_use_says_yes_except_ai_dont_use ... ok
test heuristic_player::tests::heuristic_damage_assignment_correct_total ... ok
test heuristic_player::tests::heuristic_mulligan_keeps_small_hands ... ok
test heuristic_player::tests::heuristic_mulligan_mulligans_7_card_hand ... ok
test heuristic_player::tests::heuristic_passes_when_only_option ... ok
test heuristic_player::tests::heuristic_pile_prefers_larger_for_good ... ok
test heuristic_player::tests::heuristic_prefers_land_over_pass ... ok
test heuristic_player::tests::heuristic_prefers_land_over_spell ... ok
test minimax_player::tests::minimax_ab_alpha_beta_pruning ... ok
test heuristic_player::tests::heuristic_prefers_spell_over_pass ... ok
test minimax_player::tests::minimax_passes_when_only_option ... ok
test minimax_player::tests::minimax_free_spell_preferred_over_regular ... ok
test minimax_player::tests::minimax_prefers_spell_over_pass ... ok
test minimax_player::tests::minimax_search_stats_tracked ... ok
test minimax_player::tests::minimax_prefers_land_over_spell ... ok
test observation::tests::observation_size_constant_matches ... ok
test observation::tests::phase_one_hot_encoding ... ok
test observation::tests::permanents_are_padded ... ok
test observation::tests::life_normalized_correctly ... ok
test random_player::tests::random_player_damage_assignment_sums_correctly ... ok
test random_player::tests::random_player_passes_when_only_option ... ok
test observation::tests::observation_has_correct_size ... ok
test random_player::tests::random_player_choose_use_returns_bool ... ok
test random_player::tests::random_player_chooses_from_legal_actions ... ok
test result: ok. 52 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
Running unittests src/lib.rs (target/debug/deps/mtg_cards-c237fd9c64d2d797)
running 18 tests
test keywords::behold::tests::behold_elf_cost ... ok
test keywords::behold::tests::behold_rules_text_format ... ok
test keywords::behold::tests::behold_goblin_cost ... ok
test keywords::blight::tests::blight_1_cost ... ok
test keywords::blight::tests::blight_2_cost ... ok
test keywords::blight::tests::blight_rules_text_plural ... ok
test keywords::blight::tests::blight_rules_text_singular ... ok
test keywords::mobilize::tests::mobilize_1_creates_triggered_ability ... ok
test keywords::mobilize::tests::mobilize_2_creates_two_tokens ... ok
test keywords::mobilize::tests::mobilize_3 ... ok
test registry::tests::ecl_specific_cards ... ok
test registry::tests::registry_card_counts ... ok
test registry::tests::ecl_tier2_spells ... ok
test registry::tests::registry_create_and_lookup ... ok
test registry::tests::fdn_tier2_cards ... ok
test registry::tests::registry_set_query ... ok
test registry::tests::fdn_tier3_cards ... ok
test registry::tests::tdm_tier2_spells ... ok
test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_engine-10c8e693567e8570)
running 163 tests
test abilities::tests::activated_ability ... ok
test abilities::tests::ability_store ... ok
test abilities::tests::attacks_triggered ... ok
test abilities::tests::active_zones ... ok
test abilities::tests::combat_damage_triggered ... ok
test abilities::tests::compose_realistic_card_lightning_bolt ... ok
test abilities::tests::compose_realistic_card_llanowar_elves ... ok
test abilities::tests::compose_realistic_card_mulldrifter ... ok
test abilities::tests::cost_builders ... ok
test abilities::tests::compose_realistic_lord ... ok
test abilities::tests::dies_triggered ... ok
test abilities::tests::effect_builders ... ok
test abilities::tests::end_step_triggered ... ok
test abilities::tests::etb_triggered ... ok
test abilities::tests::mana_ability ... ok
test abilities::tests::optional_trigger ... ok
test abilities::tests::spell_ability ... ok
test abilities::tests::static_ability_boost ... ok
test abilities::tests::static_effect_builders ... ok
test abilities::tests::triggered_ability ... ok
test abilities::tests::upkeep_triggered ... ok
test card::tests::create_basic_creature ... ok
test card::tests::create_basic_land ... ok
test combat::tests::blocked_damage ... ok
test combat::tests::blocker_damage_timing ... ok
test combat::tests::blocking ... ok
test combat::tests::combat_clear ... ok
test combat::tests::combat_state_basics ... ok
test combat::tests::deathtouch_minimizes_damage ... ok
test combat::tests::double_strike_both_steps ... ok
test combat::tests::first_strike_timing ... ok
test combat::tests::flying_blocks ... ok
test combat::tests::menace_requires_two_blockers ... ok
test combat::tests::trample_overflow ... ok
test combat::tests::unblocked_damage ... ok
test counters::tests::add_and_remove_counters ... ok
test counters::tests::counter_type_from_name ... ok
test counters::tests::pt_modification ... ok
test effects::tests::boost_effect ... ok
test effects::tests::continuous_effects_manager ... ok
test effects::tests::keyword_grant_effect ... ok
test effects::tests::remove_from_source ... ok
test effects::tests::replacement_effects ... ok
test effects::tests::timestamp_ordering ... ok
test events::tests::applied_effects_tracking ... ok
test events::tests::combat_events ... ok
test events::tests::damage_player_convenience ... ok
test events::tests::event_builder ... ok
test events::tests::event_log ... ok
test events::tests::prevention ... ok
test events::tests::spell_cast_event ... ok
test events::tests::zone_change_event ... ok
test filters::tests::filter_card_data ... ok
test filters::tests::filter_color ... ok
test filters::tests::filter_controller ... ok
test filters::tests::filter_creature ... ok
test filters::tests::filter_keyword ... ok
test filters::tests::filter_mana_value ... ok
test filters::tests::filter_nonland_permanent ... ok
test filters::tests::filter_not_combinator ... ok
test filters::tests::filter_or_combinator ... ok
test filters::tests::filter_power_comparison ... ok
test filters::tests::filter_tapped_untapped ... ok
test game::tests::add_counters_self_when_no_targets ... ok
test game::tests::activated_ability_goes_on_stack ... ok
test game::tests::bounce_effect ... ok
test game::tests::boost_all_and_grant_keyword_all_until_eot ... ok
test game::tests::counter_annihilation_applied ... ok
test game::tests::fight_and_bite_effects ... ok
test game::tests::draw_cards_effect ... ok
test game::tests::discard_opponents_effect ... ok
test game::tests::exile_effect ... ok
test game::tests::fight_auto_selects_creatures ... ok
test game::tests::draw_cards_from_empty_library_causes_loss ... ok
test mana::tests::can_pay_colored ... ok
test game::tests::legend_rule_applied ... ok
test game::tests::mana_ability_and_spell_cast ... ok
test game::tests::pay_costs_tap_and_sacrifice ... ok
test game::tests::game_creation ... ok
test game::tests::lose_life_opponents_effect ... ok
test mana::tests::cannot_pay_insufficient ... ok
test game::tests::gain_life_effect ... ok
test mana::tests::cost_colors ... ok
test mana::tests::can_pay_generic ... ok
test mana_pool::tests::any_mana_pays_colored ... ok
test mana_pool::tests::clear_empties_pool ... ok
test game::tests::spell_effects_execute_on_resolve ... ok
test mana_pool::tests::color_array ... ok
test game::tests::fizzle_when_target_removed ... ok
test mana_pool::tests::spend_generic_prefers_colorless ... ok
test game::tests::legal_actions_include_pass ... ok
test permanent::tests::defender_cannot_attack ... ok
test mana::tests::mana_display ... ok
test permanent::tests::haste_ignores_summoning_sickness ... ok
test mana::tests::parse_simple_cost ... ok
test mana_pool::tests::add_and_spend_colored ... ok
test permanent::tests::keyword_grants ... ok
test permanent::tests::tap_untap ... ok
test mana_pool::tests::try_pay_atomic ... ok
test player::tests::discard_check ... ok
test player::tests::find_card_in_zones ... ok
test permanent::tests::counters_modify_pt ... ok
test player::tests::game_over_states ... ok
test permanent::tests::creature_basics ... ok
test mana::tests::mana_arithmetic ... ok
test state::tests::initial_state ... ok
test player::tests::life_changes ... ok
test state::tests::next_player_wraps ... ok
test player::tests::poison_counters ... ok
test state::tests::sba_counter_annihilation ... ok
test permanent::tests::damage_and_lethal ... ok
test state::tests::sba_indestructible_survives_damage ... ok
test state::tests::sba_legend_rule ... ok
test player::tests::starting_values ... ok
test player::tests::land_plays ... ok
test state::tests::sba_life_loss ... ok
test state::tests::sba_no_counter_annihilation_when_only_one_type ... ok
test state::tests::sba_zero_toughness ... ok
test state::tests::should_end_one_player_left ... ok
test state::tests::sba_lethal_damage ... ok
test state::tests::can_cast_sorcery ... ok
test state::tests::zone_tracking ... ok
test targets::tests::divided_amounts ... ok
test state::tests::sba_legend_rule_different_controllers ... ok
test targets::tests::empty_targets ... ok
test state::tests::sba_planeswalker_zero_loyalty ... ok
test targets::tests::selected_targets_players ... ok
test targets::tests::target_definition_basics ... ok
test targets::tests::mark_illegal ... ok
test turn::tests::extra_turns ... ok
test targets::tests::mark_player_illegal ... ok
test turn::tests::extra_turns_lifo ... ok
test state::tests::sba_poison ... ok
test targets::tests::selected_targets_objects ... ok
test turn::tests::first_strike_step ... ok
test turn::tests::turn_rotation ... ok
test turn::tests::end_turn_skips_to_cleanup ... ok
test turn::tests::priority_rules ... ok
test turn::tests::priority_tracking ... ok
test turn::tests::step_to_phase_mapping ... ok
test targets::tests::target_definition_up_to ... ok
test watchers::tests::custom_watcher_player_scope ... ok
test watchers::tests::custom_watcher_reset ... ok
test watchers::tests::reset_clears_stats ... ok
test watchers::tests::track_attackers ... ok
test turn::tests::turn_step_sequence ... ok
test watchers::tests::track_cards_drawn ... ok
test watchers::tests::custom_watcher_card_scope ... ok
test watchers::tests::track_spells_cast ... ok
test watchers::tests::track_creatures_died ... ok
test watchers::tests::track_life_gained ... ok
test watchers::tests::custom_watcher_game_scope ... ok
test zones::tests::exile_zones ... ok
test zones::tests::battlefield_controlled_by ... ok
test zones::tests::graveyard_ordering ... ok
test watchers::tests::track_enters_battlefield ... ok
test zones::tests::hand_add_remove ... ok
test zones::tests::library_draw ... ok
test zones::tests::battlefield_add_remove ... ok
test zones::tests::stack_lifo ... ok
test zones::tests::library_put_on_top_and_bottom ... ok
test zones::tests::library_peek ... ok
test game::tests::game_runs_to_completion ... ok
test result: ok. 163 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
Running unittests src/lib.rs (target/debug/deps/mtg_python-d2f2ac684d6d76ac)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_tests-fac26c7f0fd5aee5)
running 19 tests
test concurrency::tests::game_state_clone_is_independent ... ok
test framework::tests::framework_bolt_kills_bear ... ok
test framework::tests::framework_create_token_effect ... ok
test concurrency::tests::gymnasium_env_runs_end_to_end ... ok
test framework::tests::framework_create_token_with_keyword ... ok
test framework::tests::framework_custom_starting_life ... ok
test framework::tests::framework_draw_cards_effect ... ok
test framework::tests::framework_direct_effect_execution ... ok
test framework::tests::framework_exile_and_assert ... ok
test framework::tests::framework_life_totals ... ok
test framework::tests::framework_gain_life_effect ... ok
test framework::tests::framework_setup_battlefield ... ok
test framework::tests::framework_multiple_permanents ... ok
test framework::tests::framework_setup_graveyard ... ok
test framework::tests::framework_setup_hand ... ok
test concurrency::tests::throughput_baseline ... ok
test concurrency::tests::parallel_games_produce_varied_results ... ok
test concurrency::tests::parallel_gymnasium_envs ... ok
test concurrency::tests::parallel_games_complete_without_panic ... ok
test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
```
## Assistant
All 252 tests pass. Now let me update the documentation. First, let me update the work queue:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"limit": 20,
"offset": 161
}
```
## Assistant
**Result** (success):
```
161→
162→## Batch 8: Fight/Bite mechanic
163→
164→**Engine**: New `Effect::Fight` (mutual damage) and/or `Effect::Bite` (one-way damage based on power).
165→
166→**Cards (~10):**
167→- [ ] FDN: Bite Down
168→- [ ] ECL: multiple fight cards
169→- [ ] TLA: Earth Rumble, others
170→
171→---
172→
173→## Batch 9: AddCountersAll (mass counter placement)
174→
175→**Engine**: Need `Effect::AddCountersAll { counter_type, count, filter }` — similar pattern to `DestroyAll`/`DealDamageAll`. Puts N counters on all permanents matching filter.
176→
177→**Cards:**
178→- [ ] ECL: Darkness Descends — `Custom("Put two -1/-1 counters on each creature.")` → `Effect::AddCountersAll { counter_type: "-1/-1", count: 2, filter: "creatures" }`
179→
180→---
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"new_string": "## Batch 8: Fight/Bite mechanic [DONE 2026-02-13]\n\n**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Both auto-select the controller's strongest creature as the \"fighter/biter\" and use explicit targets or opponent's strongest creature as the target. Helper methods `find_fight_creature()` and `find_fight_target()` handle the selection logic.\n\n**Cards fixed (6):**\n- [x] FDN: Bite Down — `Custom` → `Effect::bite()`\n- [x] FDN: Affectionate Indrik — ETB `Custom` → `Effect::fight()` + `TargetSpec::Creature`\n- [x] FDN: Felling Blow — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::Creature`\n- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::fight()`\n- [x] TDM: Piercing Exhale — `Custom` → `Effect::fight()`\n- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::fight()`\n\n**Tests added:** `fight_and_bite_effects`, `fight_auto_selects_creatures`\n\n**Skipped/Deferred:**\n- TDM: Dragonclaw Strike — \"Double P/T then fight\" — doubling not implementable\n- TDM: Dragon land (bite with Dragon-specific targeting) — custom target spec\n- FDN: Primal Might — X-cost + fight (Batch 15)\n- FDN: Tyvar's Stand (Choose one with fight) — modal (Batch 11)\n- ECL: Kithkin Whirlwind (Choose two with fight) — modal (Batch 11)\n- TLA: Earth Rumble — stub with no abilities defined\n\n---",
"old_string": "## Batch 8: Fight/Bite mechanic\n\n**Engine**: New `Effect::Fight` (mutual damage) and/or `Effect::Bite` (one-way damage based on power).\n\n**Cards (~10):**\n- [ ] FDN: Bite Down\n- [ ] ECL: multiple fight cards\n- [ ] TLA: Earth Rumble, others\n\n---",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md has been updated successfully.
```
## Assistant
Now update the per-set remediation docs. Let me check the current state of the remediation docs for the affected cards:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/fdn-remediation.md",
"pattern": "Bite Down|Affectionate Indrik|Felling Blow"
}
```
## Assistant
**Result** (success):
```
368:- [ ] **Bite Down** -- What works: nothing functional. What's broken: `Effect::Custom("Target creature you control deals damage equal to its power...")`.
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/ecl-remediation.md",
"pattern": "Assert Perfection"
}
```
## Assistant
**Result** (success):
```
397:- [ ] **Assert Perfection** — What works: `boost_until_eot(1, 0)`. What's broken: `Effect::Custom("fights target creature")`.
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/tdm-remediation.md",
"pattern": "Piercing Exhale|Knockout Maneuver"
}
```
## Assistant
**Result** (success):
```
292:- [ ] **Knockout Maneuver** — Sorcery {2}{G}. What works: AddCounters +1/+1. What's broken: `Effect::Custom("Target creature you control fights target creature you don't control.")`.
323:- [ ] **Piercing Exhale** — Instant {1}{G}. All Custom: fight effect.
```
## Assistant
Now let me check for Affectionate Indrik and Felling Blow in fdn-remediation.md:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/fdn-remediation.md",
"pattern": "Affectionate Indrik|Felling Blow"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's/- \\[ \\] \\*\\*Bite Down\\*\\* -- What works: nothing functional. What'\\''s broken: `Effect::Custom(\"Target creature you control deals damage equal to its power...\")`\\./- [x] **Bite Down** -- Fixed: `Effect::bite()`. (Batch 8)/' docs/fdn-remediation.md",
"description": "Mark Bite Down fixed in FDN remediation"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's/- \\[ \\] \\*\\*Assert Perfection\\*\\* — What works: `boost_until_eot(1, 0)`. What'\\''s broken: `Effect::Custom(\"fights target creature\")`\\./- [x] **Assert Perfection** — Fixed: `boost_until_eot(1, 0), Effect::fight()`. (Batch 8)/' docs/ecl-remediation.md",
"description": "Mark Assert Perfection fixed in ECL remediation"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's/- \\[ \\] \\*\\*Knockout Maneuver\\*\\* — Sorcery {2}{G}. What works: AddCounters +1\\/+1. What'\\''s broken: `Effect::Custom(\"Target creature you control fights target creature you don'\\''t control.\")`\\./- [x] **Knockout Maneuver** — Fixed: `add_p1p1_counters(1), Effect::fight()`. (Batch 8)/' docs/tdm-remediation.md",
"description": "Mark Knockout Maneuver fixed in TDM remediation"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's/- \\[ \\] \\*\\*Piercing Exhale\\*\\* — Instant {1}{G}. All Custom: fight effect\\./- [x] **Piercing Exhale** — Fixed: `Effect::fight()`. (Batch 8)/' docs/tdm-remediation.md",
"description": "Mark Piercing Exhale fixed in TDM remediation"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Now update ROADMAP.md:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"pattern": "fight|Fight|bite|Bite"
}
```
## Assistant
**Result** (success):
```
59:#### Fight/Bite Mechanic
61:- **Blocked cards:** Bite Down, Earth Rumble, Knockout Maneuver, Piercing Exhale, Dragonclaw Strike, Assert Perfection (~10+ cards)
136: - ~~Burglar Rat/Dream Seizer/Arbiter of Woe/Bloodtithe Collector: opponent discard Custom -> `DiscardOpponents { count }`~~ **DONE**
138:3. **Fight mechanic** -- New `Effect::Fight` variant. Two creatures deal damage equal to their power to each other. Unblocks ~10 cards.
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"limit": 15,
"offset": 55
}
```
## Assistant
**Result** (success):
```
55→- No variable cost determination
56→- X is not tracked or passed to effects
57→- **Blocked cards:** Day of Black Sun, Spectral Denial (partially works), Genesis Wave, Finale of Revelation (~10+ cards)
58→
59→#### Fight/Bite Mechanic
60→- No creature-vs-creature damage assignment outside combat
61→- **Blocked cards:** Bite Down, Earth Rumble, Knockout Maneuver, Piercing Exhale, Dragonclaw Strike, Assert Perfection (~10+ cards)
62→
63→#### ~~Token Stat Parsing~~ (DONE)
64→`CreateToken` now parses P/T and keywords from `token_name` strings (e.g., '4/4 Dragon with flying' creates a 4/4 with flying). Cards using correctly-formatted token names now work.
65→
66→#### Aura/Enchant System
67→- Auras exist as permanents but don't attach to creatures
68→- Static P/T boosts from Auras not applied
69→- Keyword grants from Auras not applied
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"new_string": "#### ~~Fight/Bite Mechanic~~ (DONE)\n`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) auto-select the controller's strongest creature as fighter and use explicit targets or opponent's strongest creature. Fixed 6 cards. Remaining fight/bite cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.",
"old_string": "#### Fight/Bite Mechanic\n- No creature-vs-creature damage assignment outside combat\n- **Blocked cards:** Bite Down, Earth Rumble, Knockout Maneuver, Piercing Exhale, Dragonclaw Strike, Assert Perfection (~10+ cards)",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md has been updated successfully.
```
## Assistant
Now update the "next batches" section in the roadmap:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"limit": 15,
"offset": 130
}
```
## Assistant
**Result** (success):
```
130→ - ~~Icewind Elemental/Refute: loot/counter Custom -> typed effects~~ **DONE**
131→ - ~~ECL RemoveCounters cards (Encumbered Reejerey, Reluctant Dounguard, Heirloom Auntie, Bristlebane Battler): Custom -> `RemoveCounters` with source fallback~~ **DONE**
132→ - ~~Mistmeadow Council: Custom -> `draw_cards(1)`~~ **DONE**
133→ - ~~Guarded Heir, Prideful Parent, Resolute Reinforcements, Release the Dogs, Dwynen's Elite, Dragonmaster Outcast, Searslicer Goblin: token creation Custom -> `create_token()`~~ **DONE**
134→ - ~~Clachan Festival (ECL): token creation Custom + Cost::Custom -> `create_token()` + `Cost::pay_mana()`~~ **DONE**
135→ - ~~Burglar Rat/Dream Seizer/Arbiter of Woe/Bloodtithe Collector: opponent discard Custom -> `DiscardOpponents { count }`~~ **DONE**
136→
137→3. **Fight mechanic** -- New `Effect::Fight` variant. Two creatures deal damage equal to their power to each other. Unblocks ~10 cards.
138→
139→### Phase 2: Key Missing Mechanics
140→
141→4. **Equipment system** -- Attach/detach, equip cost, stat/keyword application. Unblocks ~15 cards.
142→
143→5. **Modal spells** -- Mode selection in `PlayerDecisionMaker` trait, mode-conditional effect resolution. Unblocks ~20 cards.
144→
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"new_string": "3. ~~**Fight mechanic** -- New `Effect::Fight` and `Effect::Bite` variants. Fight = mutual damage, Bite = one-way. Fixed 6 cards (Bite Down, Affectionate Indrik, Felling Blow, Assert Perfection, Piercing Exhale, Knockout Maneuver).~~ **DONE**\n\n### Phase 2: Key Missing Mechanics",
"old_string": "3. **Fight mechanic** -- New `Effect::Fight` variant. Two creatures deal damage equal to their power to each other. Unblocks ~10 cards.\n\n### Phase 2: Key Missing Mechanics",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md has been updated successfully.
```
## Assistant
Let me verify the fixes are all correct by re-checking the modified card lines:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Effect::fight\\|Effect::bite\" mtg-cards/src/sets/fdn.rs mtg-cards/src/sets/ecl.rs mtg-cards/src/sets/tdm.rs",
"description": "Verify all fight/bite effect uses"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/fdn.rs:2305: vec![Effect::bite()],
mtg-cards/src/sets/fdn.rs:5252: vec![Effect::fight()],
mtg-cards/src/sets/fdn.rs:6017: vec![Effect::add_p1p1_counters(1), Effect::bite()],
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::Creature)],
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::Creature)],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::Creature)],
```
## Assistant
All 6 cards fixed. Let me do a final full test run to confirm everything is green:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo check -p mtg-cards && cargo test --lib 2>&1 | tail -30",
"description": "Final verify: check + test",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_tests-fac26c7f0fd5aee5)
running 19 tests
test concurrency::tests::game_state_clone_is_independent ... ok
test framework::tests::framework_bolt_kills_bear ... ok
test framework::tests::framework_create_token_effect ... ok
test framework::tests::framework_custom_starting_life ... ok
test framework::tests::framework_create_token_with_keyword ... ok
test concurrency::tests::gymnasium_env_runs_end_to_end ... ok
test framework::tests::framework_exile_and_assert ... ok
test framework::tests::framework_direct_effect_execution ... ok
test framework::tests::framework_gain_life_effect ... ok
test framework::tests::framework_draw_cards_effect ... ok
test framework::tests::framework_multiple_permanents ... ok
test framework::tests::framework_life_totals ... ok
test framework::tests::framework_setup_battlefield ... ok
test framework::tests::framework_setup_graveyard ... ok
test framework::tests::framework_setup_hand ... ok
test concurrency::tests::parallel_gymnasium_envs ... ok
test concurrency::tests::parallel_games_produce_varied_results ... ok
test concurrency::tests::parallel_games_complete_without_panic ... ok
test concurrency::tests::throughput_baseline ... ok
test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
```
## Assistant
All tests pass. Let me verify the remediation doc fixes took effect:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Bite Down\\|Assert Perfection\\|Knockout Maneuver\\|Piercing Exhale\" docs/fdn-remediation.md docs/ecl-remediation.md docs/tdm-remediation.md",
"description": "Verify remediation docs updated"
}
```
## Assistant
**Result** (success):
```
docs/fdn-remediation.md:368:- [x] **Bite Down** -- Fixed: `Effect::bite()`. (Batch 8)
docs/ecl-remediation.md:397:- [x] **Assert Perfection** — Fixed: `boost_until_eot(1, 0), Effect::fight()`. (Batch 8)
docs/tdm-remediation.md:292:- [x] **Knockout Maneuver** — Fixed: `add_p1p1_counters(1), Effect::fight()`. (Batch 8)
docs/tdm-remediation.md:323:- [x] **Piercing Exhale** — Fixed: `Effect::fight()`. (Batch 8)
```
## Assistant
All done. Here's a summary of **Batch 8: Fight/Bite mechanic**:
**Engine changes:**
- Added `Effect::Fight` — two creatures deal damage equal to their power to each other (mutual)
- Added `Effect::Bite` — source creature deals damage equal to its power to target (one-way)
- Added `Effect::fight()` and `Effect::bite()` constructors
- Added `find_fight_creature()` helper — uses source creature if on battlefield, otherwise auto-selects controller's strongest creature
- Added `find_fight_target()` helper — uses first target on battlefield, otherwise auto-selects opponent's strongest creature
**Cards fixed (6):**
1. **FDN: Bite Down** — `Custom` → `Effect::bite()`
2. **FDN: Affectionate Indrik** — ETB `Custom` → `Effect::fight()` + `TargetSpec::Creature`
3. **FDN: Felling Blow** — `Custom` → `add_p1p1_counters(1), Effect::bite()`
4. **ECL: Assert Perfection** — `Custom(fight)` → `Effect::fight()`
5. **TDM: Piercing Exhale** — `Custom` → `Effect::fight()`
6. **TDM: Knockout Maneuver** — `Custom` → `add_p1p1_counters(1), Effect::fight()`
**Tests added:** `fight_and_bite_effects`, `fight_auto_selects_creatures`
**252 tests passing** (was 245 → 163 engine + 18 cards + 52 AI + 19 tests = 252).
## User
Does the description of the mechanic work the same way as the Java implementation? +#### ~~Fight/Bite Mechanic~~ (DONE)
60 +`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) auto-select the controller's strongest creature as fighter and use explicit targets or opponen
+t's strongest creature. Fixed 6 cards. Remaining fight/bite cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.
## Assistant
Good question. Let me check the Java implementation to see if fight/bite actually works differently.
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage",
"pattern": "class FightTargetsEffect|class BiteEffect|class FightEffect"
}
```
## Assistant
**Result** (success):
```
Found 1 file
/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/FightTargetsEffect.java
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects",
"pattern": "FightTargetsEffect|DamagePowerTargetEffect"
}
```
## Assistant
**Result** (success):
```
Found 1 file
/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/FightTargetsEffect.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/FightTargetsEffect.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.abilities.effects.common;
2→
3→import mage.abilities.Ability;
4→import mage.abilities.Mode;
5→import mage.abilities.effects.OneShotEffect;
6→import mage.constants.Outcome;
7→import mage.game.Game;
8→import mage.game.permanent.Permanent;
9→import mage.target.Target;
10→
11→import java.util.UUID;
12→
13→/**
14→ * @author BetaSteward_at_googlemail.com
15→ */
16→public class FightTargetsEffect extends OneShotEffect {
17→
18→ protected boolean showEffectHint;
19→
20→ public FightTargetsEffect() {
21→ this(true);
22→ }
23→
24→ public FightTargetsEffect(boolean showEffectHint) {
25→ super(Outcome.Benefit);
26→ this.showEffectHint = showEffectHint;
27→ }
28→
29→ protected FightTargetsEffect(final FightTargetsEffect effect) {
30→ super(effect);
31→ this.showEffectHint = effect.showEffectHint;
32→ }
33→
34→ @Override
35→ public boolean apply(Game game, Ability source) {
36→ UUID target1Id = null;
37→ UUID target2Id = null;
38→ // first target is in target pointer, second target is a normal target
39→ if (source.getTargets().size() < 2) {
40→ if (!source.getTargets().get(0).isLegal(source, game)) {
41→ return false;
42→ }
43→ target1Id = getTargetPointer().getFirst(game, source);
44→ target2Id = source.getTargets().getFirstTarget();
45→ // two normal targets available, only if both targets are legal the effect will be applied
46→ } else if (source.getTargets().get(0).isLegal(source, game) && source.getTargets().get(1).isLegal(source, game)) {
47→ target1Id = source.getTargets().get(0).getFirstTarget();
48→ target2Id = source.getTargets().get(1).getFirstTarget();
49→ }
50→ Permanent creature1 = game.getPermanent(target1Id);
51→ Permanent creature2 = game.getPermanent(target2Id);
52→ // 20110930 - 701.10
53→ if (creature1 != null && creature2 != null && creature1.isCreature(game) && creature2.isCreature(game)) {
54→ return creature1.fight(creature2, source, game);
55→ }
56→
57→ return false;
58→ }
59→
60→ @Override
61→ public FightTargetsEffect copy() {
62→ return new FightTargetsEffect(this);
63→ }
64→
65→ @Override
66→ public String getText(Mode mode) {
67→ if (staticText != null && !staticText.isEmpty()) {
68→ return staticText;
69→ }
70→ Target target = mode.getTargets().get(1);
71→ StringBuilder sb = new StringBuilder("target ");
72→ sb.append(mode.getTargets().get(0).getTargetName());
73→ sb.append(" fights ");
74→ if (!target.getTargetName().contains("other")) {
75→ sb.append("target ");
76→ }
77→ sb.append(target.getTargetName());
78→
79→ if (showEffectHint) {
80→ sb.append(". (Each deals damage equal to its power to the other.)");
81→ }
82→
83→ return sb.toString();
84→ }
85→}
86→
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards",
"pattern": "class.*BiteDown|BiteDown extends"
}
```
## Assistant
**Result** (success):
```
Found 2 files
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/b/BiteDown.java
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/b/BiteDownOnCrime.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/b/BiteDown.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.cards.b;
2→
3→import mage.abilities.effects.common.DamageWithPowerFromOneToAnotherTargetEffect;
4→import mage.cards.CardImpl;
5→import mage.cards.CardSetInfo;
6→import mage.constants.CardType;
7→import mage.constants.TargetController;
8→import mage.filter.FilterPermanent;
9→import mage.filter.common.FilterCreatureOrPlaneswalkerPermanent;
10→import mage.target.TargetPermanent;
11→import mage.target.common.TargetControlledCreaturePermanent;
12→
13→import java.util.UUID;
14→
15→/**
16→ * @author TheElk801
17→ */
18→public final class BiteDown extends CardImpl {
19→
20→ private static final FilterPermanent filter
21→ = new FilterCreatureOrPlaneswalkerPermanent("creature or planeswalker you don't control");
22→
23→ static {
24→ filter.add(TargetController.NOT_YOU.getControllerPredicate());
25→ }
26→
27→ public BiteDown(UUID ownerId, CardSetInfo setInfo) {
28→ super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{1}{G}");
29→
30→ // Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.
31→ this.getSpellAbility().addEffect(new DamageWithPowerFromOneToAnotherTargetEffect());
32→ this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
33→ this.getSpellAbility().addTarget(new TargetPermanent(filter));
34→ }
35→
36→ private BiteDown(final BiteDown card) {
37→ super(card);
38→ }
39→
40→ @Override
41→ public BiteDown copy() {
42→ return new BiteDown(this);
43→ }
44→}
45→
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects",
"pattern": "class DamageWithPowerFromOneToAnotherTargetEffect|DamageWithPower"
}
```
## Assistant
**Result** (success):
```
Found 2 files
/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/DamageWithPowerFromOneToAnotherTargetEffect.java
/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/DamageWithPowerFromSourceToAnotherTargetEffect.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage/src/main/java/mage/abilities/effects/common/DamageWithPowerFromOneToAnotherTargetEffect.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.abilities.effects.common;
2→
3→import mage.abilities.Ability;
4→import mage.abilities.Mode;
5→import mage.abilities.effects.OneShotEffect;
6→import mage.constants.Outcome;
7→import mage.game.Game;
8→import mage.game.permanent.Permanent;
9→import mage.players.Player;
10→
11→/**
12→ * @author JayDi85
13→ */
14→public class DamageWithPowerFromOneToAnotherTargetEffect extends OneShotEffect {
15→
16→ private final String firstTargetName;
17→ private final int multiplier;
18→
19→ public DamageWithPowerFromOneToAnotherTargetEffect() {
20→ this("");
21→ }
22→
23→ public DamageWithPowerFromOneToAnotherTargetEffect(String firstTargetName) {
24→ this(firstTargetName, 1);
25→ }
26→
27→ public DamageWithPowerFromOneToAnotherTargetEffect(String firstTargetName, int multiplier) {
28→ super(Outcome.Damage);
29→ this.firstTargetName = firstTargetName;
30→ this.multiplier = multiplier;
31→ }
32→
33→ protected DamageWithPowerFromOneToAnotherTargetEffect(final DamageWithPowerFromOneToAnotherTargetEffect effect) {
34→ super(effect);
35→ this.firstTargetName = effect.firstTargetName;
36→ this.multiplier = effect.multiplier;
37→ }
38→
39→ @Override
40→ public boolean apply(Game game, Ability source) {
41→ if (source.getTargets().size() != 2) {
42→ throw new IllegalStateException("It must have two targets, but found " + source.getTargets().size());
43→ }
44→ Permanent myPermanent = game.getPermanent(getTargetPointer().getFirst(game, source));
45→ if (myPermanent == null) {
46→ return false;
47→ }
48→ int damageValue = myPermanent.getPower().getValue() * multiplier;
49→ Permanent anotherPermanent = game.getPermanent(source.getTargets().get(1).getFirstTarget());
50→ Player anotherPlayer = game.getPlayer(source.getTargets().get(1).getFirstTarget());
51→ if (anotherPermanent != null) {
52→ anotherPermanent.damage(damageValue, myPermanent.getId(), source, game, false, true);
53→ return true;
54→ } else if (anotherPlayer != null) {
55→ anotherPlayer.damage(damageValue, myPermanent.getId(), source, game);
56→ return true;
57→ }
58→ return false;
59→ }
60→
61→ @Override
62→ public DamageWithPowerFromOneToAnotherTargetEffect copy() {
63→ return new DamageWithPowerFromOneToAnotherTargetEffect(this);
64→ }
65→
66→ @Override
67→ public String getText(Mode mode) {
68→ if (staticText != null && !staticText.isEmpty()) {
69→ return staticText;
70→ }
71→
72→ if (mode.getTargets().size() != 2) {
73→ throw new IllegalStateException("It must have two targets, but found " + mode.getTargets().size());
74→ }
75→
76→ return (firstTargetName.isEmpty() ? mode.getTargets().get(0).getDescription() : firstTargetName) +
77→ " deals damage equal to" + (multiplier == 2 ? " twice" : "") +
78→ " its power to " + mode.getTargets().get(1).getDescription();
79→ }
80→}
81→
```
## Assistant
## Assistant
No, it doesn't. The Java implementation is meaningfully different:
**Java** (`FightTargetsEffect`):
- Has **two explicit targets** chosen by the player: target 1 = your creature, target 2 = opponent's creature
- Both must be legal for the effect to resolve
- The player decides which of their creatures fights
**Java** (`DamageWithPowerFromOneToAnotherTargetEffect` — bite):
- Also **two explicit targets**: target 1 = your creature (power source), target 2 = opponent's creature/player
- Can target players too, not just creatures
**Our implementation**:
- Auto-selects controller's **strongest** creature (no player choice)
- Falls back to opponent's strongest creature if no target
- Only one target slot in `TargetSpec`
The core issue is our `TargetSpec` system only supports one target type per ability, so we can't model the two-target "your creature + their creature" pattern that fight/bite spells actually use. The auto-select-strongest heuristic is a workaround.
For ETB triggers (Affectionate Indrik), it's mostly correct — the source *is* the creature, and the target is the opponent's creature. But for spells, the player should be choosing which creature fights, not auto-picking strongest.
Let me update the ROADMAP to be honest about this limitation:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"new_string": "#### ~~Fight/Bite Mechanic~~ (PARTIAL)\n`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) implemented. Fixed 6 cards. **Limitation**: Java uses two explicit player-chosen targets (your creature + their creature); our engine auto-selects controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers (e.g. Affectionate Indrik) are correct since source=creature. Spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support. Remaining cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.",
"old_string": "#### ~~Fight/Bite Mechanic~~ (DONE)\n`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) auto-select the controller's strongest creature as fighter and use explicit targets or opponent's strongest creature. Fixed 6 cards. Remaining fight/bite cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md has been updated successfully.
```
## Assistant
Also update the phase summary:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"new_string": "3. ~~**Fight mechanic** -- New `Effect::Fight` and `Effect::Bite` variants. Fight = mutual damage, Bite = one-way. Fixed 6 cards.~~ **PARTIAL** — auto-selects strongest creature instead of player choice (needs multi-target `TargetSpec`). ETB triggers correct; spell-based is heuristic.",
"old_string": "3. ~~**Fight mechanic** -- New `Effect::Fight` and `Effect::Bite` variants. Fight = mutual damage, Bite = one-way. Fixed 6 cards (Bite Down, Affectionate Indrik, Felling Blow, Assert Perfection, Piercing Exhale, Knockout Maneuver).~~ **DONE**",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md has been updated successfully.
```
## Assistant
And update the work queue similarly:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"limit": 10,
"offset": 162
}
```
## Assistant
**Result** (success):
```
162→## Batch 8: Fight/Bite mechanic [DONE 2026-02-13]
163→
164→**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Both auto-select the controller's strongest creature as the "fighter/biter" and use explicit targets or opponent's strongest creature as the target. Helper methods `find_fight_creature()` and `find_fight_target()` handle the selection logic.
165→
166→**Cards fixed (6):**
167→- [x] FDN: Bite Down — `Custom` → `Effect::bite()`
168→- [x] FDN: Affectionate Indrik — ETB `Custom` → `Effect::fight()` + `TargetSpec::Creature`
169→- [x] FDN: Felling Blow — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::Creature`
170→- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::fight()`
171→- [x] TDM: Piercing Exhale — `Custom` → `Effect::fight()`
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"new_string": "**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Helper methods `find_fight_creature()` and `find_fight_target()` handle creature selection. **Known limitation**: Java uses two explicit player-chosen targets (your creature + opponent's creature via `FightTargetsEffect` / `DamageWithPowerFromOneToAnotherTargetEffect`); our engine auto-selects the controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers are correct (source=creature); spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support.",
"old_string": "**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Both auto-select the controller's strongest creature as the \"fighter/biter\" and use explicit targets or opponent's strongest creature as the target. Helper methods `find_fight_creature()` and `find_fight_target()` handle the selection logic.",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md has been updated successfully.
```
## Assistant
The docs now accurately describe the gap. To summarize: the Java implementation uses proper two-target selection where the player chooses both creatures, while our engine auto-picks the strongest creature as a heuristic since `TargetSpec` doesn't support multi-target with different filters. The damage mechanics (mutual for fight, one-way for bite) are correct — it's the creature selection that's simplified.
## User
Let
## User
[Request interrupted by user]
## User
Let's fix the gap please
## Assistant
## Assistant
Let me understand how targets flow through the system so I can design the fix properly.
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src",
"pattern": "choose_targets|select_targets|TargetRequirement"
}
```
## Assistant
**Result** (success):
```
Found 2 files
mtg-engine/src/game.rs
mtg-engine/src/decision.rs
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/decision.rs",
"pattern": "struct TargetRequirement|pub struct TargetRequirement"
}
```
## Assistant
**Result** (success):
```
73:pub struct TargetRequirement {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/decision.rs",
"limit": 40,
"offset": 60
}
```
## Assistant
**Result** (success):
```
60→
61→/// Types of special actions that don't use the stack.
62→#[derive(Clone, Debug, PartialEq, Eq)]
63→pub enum SpecialActionType {
64→ TurnFaceUp,
65→ PlayFromExile,
66→ CompanionToHand,
67→ Foretell,
68→ Other(String),
69→}
70→
71→/// Describes a target requirement for a spell or ability being resolved.
72→#[derive(Clone, Debug)]
73→pub struct TargetRequirement {
74→ /// Human-readable description of what is being targeted (e.g. "target creature").
75→ pub description: String,
76→ /// Legal target object IDs.
77→ pub legal_targets: Vec,
78→ /// Minimum number of targets to choose.
79→ pub min_targets: usize,
80→ /// Maximum number of targets to choose.
81→ pub max_targets: usize,
82→ /// Whether this is a mandatory or optional target.
83→ pub required: bool,
84→}
85→
86→/// Describes a choice from a list of named options (e.g. mode selection, pile choice).
87→#[derive(Clone, Debug)]
88→pub struct NamedChoice {
89→ /// The unique key/index for this choice.
90→ pub index: usize,
91→ /// Human-readable description of the option.
92→ pub description: String,
93→}
94→
95→/// Describes an amount of damage that must be distributed among targets.
96→#[derive(Clone, Debug)]
97→pub struct DamageAssignment {
98→ /// Total damage to distribute.
99→ pub total_damage: u32,
```
## Assistant
Now let me see how targets are resolved when a spell is cast — how the engine goes from `TargetSpec` to the `targets: &[ObjectId]` that gets passed to `execute_effects`.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn resolve_spell|fn resolve_ability|fn resolve_stack|choose_targets"
}
```
## Assistant
**Result** (success):
```
1732: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
2490: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "resolve_top|fn resolve|execute_effects"
}
```
## Assistant
**Result** (success):
```
492: self.resolve_top_of_stack();
688: fn resolve_top_of_stack(&mut self) {
741: self.execute_effects(&effects, item.controller, &targets, Some(item.id));
751: self.execute_effects(&ability.effects, item.controller, &targets, Some(source));
949: pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
2149: game.resolve_top_of_stack();
2214: game.resolve_top_of_stack();
2246: game.execute_effects(&[Effect::DrawCards { count: 2 }], p1, &[], None);
2276: game.execute_effects(&[Effect::GainLife { amount: 5 }], p1, &[], None);
2301: game.execute_effects(&[Effect::lose_life_opponents(3)], p1, &[], None);
2339: game.execute_effects(&[Effect::Exile], p1, &[bear_id], None);
2377: game.execute_effects(&[Effect::Bounce], p1, &[bear_id], None);
2461: game.execute_effects(
2472: game.execute_effects(
2545: game.execute_effects(&[Effect::discard_opponents(1)], p1, &[], None);
2587: game.execute_effects(
2598: game.execute_effects(
2640: game.execute_effects(
2659: game.execute_effects(
2707: game.execute_effects(&[Effect::fight()], p1, &[], None);
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 80,
"offset": 688
}
```
## Assistant
**Result** (success):
```
688→ fn resolve_top_of_stack(&mut self) {
689→ let item = match self.state.stack.pop() {
690→ Some(item) => item,
691→ None => return,
692→ };
693→
694→ if item.countered {
695→ // Countered spells go to graveyard
696→ self.move_card_to_graveyard(item.id, item.controller);
697→ return;
698→ }
699→
700→ // Fizzle check: if the spell/ability has targets and all targets are
701→ // now illegal (left the battlefield, gained hexproof, etc.), it fizzles.
702→ // Note: targets stored as ObjectIds; player targets are tracked separately
703→ // in the SelectedTargets system (targets.rs). This simplified check only
704→ // validates permanent targets on the battlefield.
705→ if !item.targets.is_empty() {
706→ let any_legal = item.targets.iter().any(|&target_id| {
707→ self.state.battlefield.contains(target_id)
708→ || self.state.stack.get(target_id).is_some()
709→ });
710→ if !any_legal {
711→ // All targets are illegal — fizzle
712→ match &item.kind {
713→ crate::zones::StackItemKind::Spell { .. } => {
714→ self.move_card_to_graveyard(item.id, item.controller);
715→ }
716→ crate::zones::StackItemKind::Ability { .. } => {
717→ // Abilities just cease to exist when fizzled
718→ }
719→ }
720→ return;
721→ }
722→ }
723→
724→ match &item.kind {
725→ crate::zones::StackItemKind::Spell { card } => {
726→ if card.is_permanent_card() {
727→ // Register abilities from the card
728→ for ability in &card.abilities {
729→ self.state.ability_store.add(ability.clone());
730→ }
731→ // Permanent spells enter the battlefield
732→ let perm = Permanent::new(card.clone(), item.controller);
733→ self.state.battlefield.add(perm);
734→ self.state.set_zone(item.id, crate::constants::Zone::Battlefield, None);
735→ } else {
736→ // Non-permanent spells: execute effects then go to graveyard
737→ let effects: Vec = card.abilities.iter()
738→ .flat_map(|a| a.effects.clone())
739→ .collect();
740→ let targets = item.targets.clone();
741→ self.execute_effects(&effects, item.controller, &targets, Some(item.id));
742→ self.move_card_to_graveyard(item.id, item.controller);
743→ }
744→ }
745→ crate::zones::StackItemKind::Ability { ability_id, source_id, .. } => {
746→ // Resolve ability: find its effects and execute them
747→ let source = *source_id;
748→ let ability_data = self.state.ability_store.get(*ability_id).cloned();
749→ if let Some(ability) = ability_data {
750→ let targets = item.targets.clone();
751→ self.execute_effects(&ability.effects, item.controller, &targets, Some(source));
752→ }
753→ }
754→ }
755→ }
756→
757→ /// Process state-based actions in a loop until no more are found.
758→ pub fn process_state_based_actions(&mut self) {
759→ for _ in 0..MAX_SBA_ITERATIONS {
760→ let sba = self.state.check_state_based_actions();
761→ if !sba.has_actions() {
762→ break;
763→ }
764→ self.apply_state_based_actions(&sba);
765→ }
766→ }
767→
```
## Assistant
Now let me see how targets get selected when a spell goes on the stack.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn cast_spell|fn put_on_stack|StackItem|select_target|targets.*TargetSpec"
}
```
## Assistant
**Result** (success):
```
654: fn cast_spell(&mut self, player_id: PlayerId, card_id: ObjectId) {
676: let stack_item = crate::zones::StackItem {
678: kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },
713: crate::zones::StackItemKind::Spell { .. } => {
716: crate::zones::StackItemKind::Ability { .. } => {
725: crate::zones::StackItemKind::Spell { card } => {
745: crate::zones::StackItemKind::Ability { ability_id, source_id, .. } => {
828: let stack_item = crate::zones::StackItem {
830: kind: crate::zones::StackItemKind::Ability {
1086: crate::zones::StackItemKind::Spell { .. } => {
2139: let stack_item = crate::zones::StackItem {
2141: kind: crate::zones::StackItemKind::Spell { card: bolt },
2201: let stack_item = crate::zones::StackItem {
2203: kind: crate::zones::StackItemKind::Spell { card: murder },
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 35,
"offset": 654
}
```
## Assistant
**Result** (success):
```
654→ fn cast_spell(&mut self, player_id: PlayerId, card_id: ObjectId) {
655→ let card_data = match self.state.card_store.get(card_id).cloned() {
656→ Some(c) => c,
657→ None => return,
658→ };
659→
660→ // Remove from hand
661→ if let Some(player) = self.state.players.get_mut(&player_id) {
662→ if !player.hand.remove(card_id) {
663→ return;
664→ }
665→
666→ // Pay mana cost
667→ let mana_cost = card_data.mana_cost.to_mana();
668→ if !player.mana_pool.try_pay(&mana_cost) {
669→ // Can't pay — put card back in hand
670→ player.hand.add(card_id);
671→ return;
672→ }
673→ }
674→
675→ // Put on the stack
676→ let stack_item = crate::zones::StackItem {
677→ id: card_id,
678→ kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },
679→ controller: player_id,
680→ targets: vec![],
681→ countered: false,
682→ };
683→ self.state.stack.push(stack_item);
684→ self.state.set_zone(card_id, crate::constants::Zone::Stack, None);
685→ }
686→
687→ /// Resolve the top item on the stack.
688→ fn resolve_top_of_stack(&mut self) {
```
## Assistant
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "\\.targets\\s*=|targets\\.push|select_target|choose_target"
}
```
## Assistant
**Result** (success):
```
1732: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
2490: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-i": true,
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "select_target|choose_target|pick_target|fn.*target"
}
```
## Assistant
**Result** (success):
```
949: pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
1667: fn find_fight_target(
1732: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
2162: fn fizzle_when_target_removed() {
2431: fn add_counters_self_when_no_targets() {
2490: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "TargetSpec"
}
```
## Assistant
**Result** (success):
```
1716: use crate::abilities::{Ability, Cost, Effect, TargetSpec};
2069: TargetSpec::CreatureOrPlayer,
2136: TargetSpec::CreatureOrPlayer,
2198: TargetSpec::Creature,
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn.*target|target_selection|resolve_target"
}
```
## Assistant
**Result** (success):
```
949: pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
1667: fn find_fight_target(
1732: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
2162: fn fizzle_when_target_removed() {
2431: fn add_counters_self_when_no_targets() {
2490: fn choose_targets(&mut self, _: &GameView<'_>, _: Outcome, _: &TargetRequirement) -> Vec { vec![] }
```
## Assistant
Let me look at how the target flow works more broadly — how does the stack item get its targets populated? Let me check if there's a separate target selection phase.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "\\.targets"
}
```
## Assistant
**Result** (success):
```
705: if !item.targets.is_empty() {
706: let any_legal = item.targets.iter().any(|&target_id| {
740: let targets = item.targets.clone();
750: let targets = item.targets.clone();
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn put_ability_on_stack|fn trigger"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "stack\\.push|StackItem"
}
```
## Assistant
**Result** (success):
```
676: let stack_item = crate::zones::StackItem {
678: kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },
683: self.state.stack.push(stack_item);
713: crate::zones::StackItemKind::Spell { .. } => {
716: crate::zones::StackItemKind::Ability { .. } => {
725: crate::zones::StackItemKind::Spell { card } => {
745: crate::zones::StackItemKind::Ability { ability_id, source_id, .. } => {
828: let stack_item = crate::zones::StackItem {
830: kind: crate::zones::StackItemKind::Ability {
839: self.state.stack.push(stack_item);
1086: crate::zones::StackItemKind::Spell { .. } => {
2139: let stack_item = crate::zones::StackItem {
2141: kind: crate::zones::StackItemKind::Spell { card: bolt },
2146: game.state.stack.push(stack_item);
2201: let stack_item = crate::zones::StackItem {
2203: kind: crate::zones::StackItemKind::Spell { card: murder },
2208: game.state.stack.push(stack_item);
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 50,
"offset": 818
}
```
## Assistant
**Result** (success):
```
818→ Some(a) => a,
819→ None => return,
820→ };
821→
822→ // Pay costs
823→ if !self.pay_costs(player_id, source_id, &ability.costs) {
824→ return;
825→ }
826→
827→ // Put the ability on the stack
828→ let stack_item = crate::zones::StackItem {
829→ id: ObjectId::new(), // New ID for the stack object
830→ kind: crate::zones::StackItemKind::Ability {
831→ source_id,
832→ ability_id,
833→ description: ability.rules_text.clone(),
834→ },
835→ controller: player_id,
836→ targets: targets.to_vec(),
837→ countered: false,
838→ };
839→ self.state.stack.push(stack_item);
840→ }
841→
842→ /// Activate a mana ability (resolves immediately, doesn't use the stack).
843→ fn activate_mana_ability(
844→ &mut self,
845→ player_id: PlayerId,
846→ source_id: ObjectId,
847→ ability_id: AbilityId,
848→ ) {
849→ let ability = match self.state.ability_store.get(ability_id).cloned() {
850→ Some(a) => a,
851→ None => return,
852→ };
853→
854→ if !ability.is_mana_ability() {
855→ return;
856→ }
857→
858→ // Pay costs (typically just tap)
859→ if !self.pay_costs(player_id, source_id, &ability.costs) {
860→ return;
861→ }
862→
863→ // Resolve immediately: add mana
864→ if let Some(mana) = ability.mana_produced {
865→ if let Some(player) = self.state.players.get_mut(&player_id) {
866→ player.mana_pool.add(mana, None, false);
867→ }
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 40,
"offset": 780
}
```
## Assistant
**Result** (success):
```
780→ let owner = perm.owner();
781→ self.state.ability_store.remove_source(perm_id);
782→ self.move_card_to_graveyard(perm_id, owner);
783→ }
784→ }
785→
786→ // Permanents being destroyed (lethal damage)
787→ for &perm_id in &sba.permanents_to_destroy {
788→ if let Some(perm) = self.state.battlefield.remove(perm_id) {
789→ let owner = perm.owner();
790→ self.state.ability_store.remove_source(perm_id);
791→ self.move_card_to_graveyard(perm_id, owner);
792→ }
793→ }
794→
795→ // Counter annihilation: +1/+1 and -1/-1 counters cancel out
796→ for &perm_id in &sba.counters_to_annihilate {
797→ if let Some(perm) = self.state.battlefield.get_mut(perm_id) {
798→ let p1p1 = perm.counters.get(&CounterType::P1P1);
799→ let m1m1 = perm.counters.get(&CounterType::M1M1);
800→ let to_remove = p1p1.min(m1m1);
801→ if to_remove > 0 {
802→ perm.counters.remove(&CounterType::P1P1, to_remove);
803→ perm.counters.remove(&CounterType::M1M1, to_remove);
804→ }
805→ }
806→ }
807→ }
808→
809→ /// Activate an activated ability (goes on the stack).
810→ fn activate_ability(
811→ &mut self,
812→ player_id: PlayerId,
813→ source_id: ObjectId,
814→ ability_id: AbilityId,
815→ targets: &[ObjectId],
816→ ) {
817→ let ability = match self.state.ability_store.get(ability_id).cloned() {
818→ Some(a) => a,
819→ None => return,
```
## Assistant
Now let me see where targets get selected for spells (cast_spell currently uses `targets: vec![]`). Let me find the action processing:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "PlayerAction::Cast|PlayerAction::Activate|fn process_action"
}
```
## Assistant
**Result** (success):
```
508: crate::decision::PlayerAction::CastSpell { card_id, .. } => {
513: crate::decision::PlayerAction::ActivateAbility { source_id, ability_id, targets } => {
518: crate::decision::PlayerAction::ActivateManaAbility { source_id, ability_id } => {
574: actions.push(crate::decision::PlayerAction::CastSpell {
612: actions.push(crate::decision::PlayerAction::ActivateAbility {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 30,
"offset": 505
}
```
## Assistant
**Result** (success):
```
505→ // Priority stays with the active player after playing a land
506→ tracker.current = priority_player;
507→ }
508→ crate::decision::PlayerAction::CastSpell { card_id, .. } => {
509→ self.cast_spell(priority_player, card_id);
510→ tracker.reset();
511→ tracker.current = priority_player;
512→ }
513→ crate::decision::PlayerAction::ActivateAbility { source_id, ability_id, targets } => {
514→ self.activate_ability(priority_player, source_id, ability_id, &targets);
515→ tracker.reset();
516→ tracker.current = priority_player;
517→ }
518→ crate::decision::PlayerAction::ActivateManaAbility { source_id, ability_id } => {
519→ // Mana abilities don't use the stack — resolve immediately
520→ self.activate_mana_ability(priority_player, source_id, ability_id);
521→ // Mana abilities don't reset priority passes
522→ }
523→ _ => {
524→ // Other actions (special actions)
525→ tracker.reset();
526→ tracker.current = priority_player;
527→ }
528→ }
529→ }
530→ }
531→
532→ /// Compute the legal actions for a player who has priority.
533→ fn compute_legal_actions(&self, player_id: PlayerId) -> Vec {
534→ let mut actions = vec![crate::decision::PlayerAction::Pass];
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 65,
"offset": 560
}
```
## Assistant
**Result** (success):
```
560→
561→ // Check if the player can pay the mana cost
562→ let mana_cost = card.mana_cost.to_mana();
563→ let available = player.mana_pool.available();
564→
565→ if available.can_pay(&mana_cost) {
566→ // Sorcery-speed cards need sorcery timing
567→ let needs_sorcery = !card.is_instant()
568→ && !card.keywords.contains(crate::constants::KeywordAbilities::FLASH);
569→
570→ if needs_sorcery && !can_sorcery {
571→ continue;
572→ }
573→
574→ actions.push(crate::decision::PlayerAction::CastSpell {
575→ card_id,
576→ targets: vec![],
577→ mode: None,
578→ without_mana: false,
579→ });
580→ }
581→ }
582→ }
583→
584→ // Check for activatable abilities on permanents the player controls
585→ let controlled_perms: Vec<(ObjectId, bool)> = self.state.battlefield
586→ .controlled_by(player_id)
587→ .map(|p| (p.id(), p.tapped))
588→ .collect();
589→
590→ for (perm_id, is_tapped) in controlled_perms {
591→ let abilities: Vec<(AbilityId, bool, bool)> = self.state.ability_store
592→ .for_source(perm_id)
593→ .iter()
594→ .filter(|a| {
595→ a.ability_type == AbilityType::ActivatedNonMana
596→ && a.can_activate_in_zone(crate::constants::Zone::Battlefield)
597→ })
598→ .map(|a| {
599→ let needs_tap = a.costs.iter().any(|c| matches!(c, Cost::TapSelf));
600→ let needs_mana = a.costs.iter().any(|c| matches!(c, Cost::Mana(_)));
601→ (a.id, needs_tap, needs_mana)
602→ })
603→ .collect();
604→
605→ for (ability_id, needs_tap, _needs_mana) in abilities {
606→ // Can't activate if it requires tap and the permanent is already tapped
607→ if needs_tap && is_tapped {
608→ continue;
609→ }
610→ // Sorcery-speed activated abilities need sorcery timing
611→ // (Simplification: all activated abilities can be used at instant speed)
612→ actions.push(crate::decision::PlayerAction::ActivateAbility {
613→ source_id: perm_id,
614→ ability_id,
615→ targets: vec![],
616→ });
617→ }
618→ }
619→
620→ actions
621→ }
622→
623→ /// Play a land from a player's hand onto the battlefield.
624→ fn play_land(&mut self, player_id: PlayerId, card_id: ObjectId) {
```
## Assistant
## Assistant
I see the full picture now. The issue is deeper than just fight/bite — the engine currently **never selects targets** for any spell or ability. `targets: vec![]` is hardcoded everywhere. Fight/Bite auto-selection is actually consistent with how `DealDamage`, `Destroy`, etc. all work with empty targets.
Let me look at how the action space and legal actions work to understand what a proper fix entails.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src/action_space.rs",
"limit": 100
}
```
## Assistant
**Result** (success):
```
1→// Action space for RL — two-phase action encoding.
2→//
3→// MTG has a combinatorially large action space (cast spell X targeting Y with
4→// mode Z paying mana from sources A, B, C...). Encoding every combination as
5→// a discrete action is infeasible. Instead, we use a two-phase approach:
6→//
7→// Phase 1: Choose an action TYPE from a fixed-size vocabulary.
8→// - Pass priority
9→// - Cast spell (indexed by hand position 0..MAX_HAND)
10→// - Activate ability (indexed by permanent position 0..MAX_PERMANENTS,
11→// ability index 0..MAX_ABILITIES_PER_PERM)
12→// - Play land (indexed by hand position 0..MAX_HAND)
13→//
14→// Phase 2: Choose action PARAMETERS (targets, modes, etc.)
15→// - Target selection from legal targets (indexed 0..MAX_TARGETS)
16→// - Mode selection for modal spells
17→//
18→// Each phase uses an action mask to filter to legal options only.
19→
20→use mtg_engine::decision::PlayerAction;
21→use mtg_engine::types::{AbilityId, ObjectId};
22→
23→// ---------------------------------------------------------------------------
24→// Dimension constants
25→// ---------------------------------------------------------------------------
26→
27→/// Max cards in hand for action indexing.
28→pub const MAX_HAND_ACTIONS: usize = 15;
29→/// Max permanents for ability activation indexing.
30→pub const MAX_PERMANENT_ACTIONS: usize = 50;
31→/// Max abilities per permanent.
32→pub const MAX_ABILITIES_PER_PERMANENT: usize = 4;
33→/// Max targets to select from.
34→pub const MAX_TARGET_ACTIONS: usize = 50;
35→/// Max modes for modal spells.
36→pub const MAX_MODE_ACTIONS: usize = 5;
37→
38→/// Total Phase 1 action space size.
39→/// Layout: [Pass(1), CastSpell(MAX_HAND), PlayLand(MAX_HAND),
40→/// ActivateAbility(MAX_PERMANENT * MAX_ABILITIES)]
41→pub const PHASE1_ACTION_SIZE: usize =
42→ 1 + MAX_HAND_ACTIONS + MAX_HAND_ACTIONS + MAX_PERMANENT_ACTIONS * MAX_ABILITIES_PER_PERMANENT;
43→
44→/// Total Phase 2 action space size (target/mode selection).
45→/// Layout: [targets(MAX_TARGET), modes(MAX_MODE), done(1)]
46→pub const PHASE2_ACTION_SIZE: usize = MAX_TARGET_ACTIONS + MAX_MODE_ACTIONS + 1;
47→
48→// ---------------------------------------------------------------------------
49→// Phase 1 action type
50→// ---------------------------------------------------------------------------
51→
52→/// An action in Phase 1 (what to do).
53→#[derive(Clone, Copy, Debug, PartialEq, Eq)]
54→pub enum Phase1Action {
55→ /// Index 0: pass priority.
56→ Pass,
57→ /// Indices 1..=MAX_HAND: cast spell from hand position.
58→ CastSpell { hand_index: usize },
59→ /// Indices after CastSpell: play land from hand position.
60→ PlayLand { hand_index: usize },
61→ /// Indices after PlayLand: activate ability on permanent.
62→ ActivateAbility {
63→ permanent_index: usize,
64→ ability_index: usize,
65→ },
66→}
67→
68→impl Phase1Action {
69→ /// Convert to a flat action index (0..PHASE1_ACTION_SIZE).
70→ pub fn to_index(self) -> usize {
71→ match self {
72→ Phase1Action::Pass => 0,
73→ Phase1Action::CastSpell { hand_index } => 1 + hand_index,
74→ Phase1Action::PlayLand { hand_index } => 1 + MAX_HAND_ACTIONS + hand_index,
75→ Phase1Action::ActivateAbility {
76→ permanent_index,
77→ ability_index,
78→ } => {
79→ 1 + MAX_HAND_ACTIONS
80→ + MAX_HAND_ACTIONS
81→ + permanent_index * MAX_ABILITIES_PER_PERMANENT
82→ + ability_index
83→ }
84→ }
85→ }
86→
87→ /// Convert from a flat action index back to a Phase1Action.
88→ pub fn from_index(index: usize) -> Option {
89→ if index == 0 {
90→ return Some(Phase1Action::Pass);
91→ }
92→ let index = index - 1;
93→ if index < MAX_HAND_ACTIONS {
94→ return Some(Phase1Action::CastSpell { hand_index: index });
95→ }
96→ let index = index - MAX_HAND_ACTIONS;
97→ if index < MAX_HAND_ACTIONS {
98→ return Some(Phase1Action::PlayLand { hand_index: index });
99→ }
100→ let index = index - MAX_HAND_ACTIONS;
```
## Assistant
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src/action_space.rs",
"limit": 80,
"offset": 100
}
```
## Assistant
**Result** (success):
```
100→ let index = index - MAX_HAND_ACTIONS;
101→ if index < MAX_PERMANENT_ACTIONS * MAX_ABILITIES_PER_PERMANENT {
102→ let permanent_index = index / MAX_ABILITIES_PER_PERMANENT;
103→ let ability_index = index % MAX_ABILITIES_PER_PERMANENT;
104→ return Some(Phase1Action::ActivateAbility {
105→ permanent_index,
106→ ability_index,
107→ });
108→ }
109→ None
110→ }
111→}
112→
113→// ---------------------------------------------------------------------------
114→// Phase 2 action type
115→// ---------------------------------------------------------------------------
116→
117→/// An action in Phase 2 (parameterization: target/mode selection).
118→#[derive(Clone, Copy, Debug, PartialEq, Eq)]
119→pub enum Phase2Action {
120→ /// Select target at index 0..MAX_TARGET.
121→ SelectTarget { target_index: usize },
122→ /// Select mode at index 0..MAX_MODE.
123→ SelectMode { mode_index: usize },
124→ /// Done selecting (confirm choices).
125→ Done,
126→}
127→
128→impl Phase2Action {
129→ pub fn to_index(self) -> usize {
130→ match self {
131→ Phase2Action::SelectTarget { target_index } => target_index,
132→ Phase2Action::SelectMode { mode_index } => MAX_TARGET_ACTIONS + mode_index,
133→ Phase2Action::Done => MAX_TARGET_ACTIONS + MAX_MODE_ACTIONS,
134→ }
135→ }
136→
137→ pub fn from_index(index: usize) -> Option {
138→ if index < MAX_TARGET_ACTIONS {
139→ return Some(Phase2Action::SelectTarget {
140→ target_index: index,
141→ });
142→ }
143→ let index = index - MAX_TARGET_ACTIONS;
144→ if index < MAX_MODE_ACTIONS {
145→ return Some(Phase2Action::SelectMode { mode_index: index });
146→ }
147→ if index == MAX_MODE_ACTIONS {
148→ return Some(Phase2Action::Done);
149→ }
150→ None
151→ }
152→}
153→
154→// ---------------------------------------------------------------------------
155→// Action mask
156→// ---------------------------------------------------------------------------
157→
158→/// A boolean mask over the action space. Used to filter out illegal actions.
159→///
160→/// Neural networks output logits for all actions; the mask sets illegal
161→/// actions to -inf before softmax to ensure only legal actions are selected.
162→#[derive(Clone, Debug)]
163→pub struct ActionMask {
164→ pub mask: Vec,
165→}
166→
167→impl ActionMask {
168→ /// Create a mask where all actions are illegal (all false).
169→ pub fn new(size: usize) -> Self {
170→ ActionMask {
171→ mask: vec![false; size],
172→ }
173→ }
174→
175→ /// Create a Phase 1 mask from a list of legal PlayerActions.
176→ ///
177→ /// `hand_ids` maps hand position index -> ObjectId for cards in hand.
178→ /// `permanent_ids` maps permanent position index -> (ObjectId, ability_count).
179→ /// These mappings are needed to translate between the engine's ObjectId-based
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src/action_space.rs",
"limit": 120,
"offset": 180
}
```
## Assistant
**Result** (success):
```
180→ /// actions and the RL agent's index-based actions.
181→ pub fn phase1_from_legal_actions(
182→ legal_actions: &[PlayerAction],
183→ hand_ids: &[ObjectId],
184→ permanent_abilities: &[(ObjectId, Vec)], // (perm_id, [ability_ids])
185→ ) -> Self {
186→ let mut mask = ActionMask::new(PHASE1_ACTION_SIZE);
187→
188→ for action in legal_actions {
189→ match action {
190→ PlayerAction::Pass => {
191→ mask.mask[0] = true;
192→ }
193→ PlayerAction::CastSpell { card_id, .. } => {
194→ if let Some(idx) = hand_ids.iter().position(|id| id == card_id) {
195→ if idx < MAX_HAND_ACTIONS {
196→ mask.mask[Phase1Action::CastSpell { hand_index: idx }.to_index()] =
197→ true;
198→ }
199→ }
200→ }
201→ PlayerAction::PlayLand { card_id } => {
202→ if let Some(idx) = hand_ids.iter().position(|id| id == card_id) {
203→ if idx < MAX_HAND_ACTIONS {
204→ mask.mask[Phase1Action::PlayLand { hand_index: idx }.to_index()] = true;
205→ }
206→ }
207→ }
208→ PlayerAction::ActivateAbility {
209→ source_id,
210→ ability_id,
211→ ..
212→ } => {
213→ if let Some(perm_idx) = permanent_abilities
214→ .iter()
215→ .position(|(pid, _)| pid == source_id)
216→ {
217→ if perm_idx < MAX_PERMANENT_ACTIONS {
218→ let (_, abilities) = &permanent_abilities[perm_idx];
219→ if let Some(ab_idx) =
220→ abilities.iter().position(|aid| aid == ability_id)
221→ {
222→ if ab_idx < MAX_ABILITIES_PER_PERMANENT {
223→ mask.mask[Phase1Action::ActivateAbility {
224→ permanent_index: perm_idx,
225→ ability_index: ab_idx,
226→ }
227→ .to_index()] = true;
228→ }
229→ }
230→ }
231→ }
232→ }
233→ PlayerAction::ActivateManaAbility { .. }
234→ | PlayerAction::SpecialAction { .. } => {
235→ // Mana abilities and special actions are handled separately
236→ // (Phase 2 or special decision methods), not in Phase 1.
237→ }
238→ }
239→ }
240→
241→ mask
242→ }
243→
244→ /// Create a Phase 2 target selection mask.
245→ pub fn phase2_target_mask(legal_target_indices: &[usize], allow_done: bool) -> Self {
246→ let mut mask = ActionMask::new(PHASE2_ACTION_SIZE);
247→ for &idx in legal_target_indices {
248→ if idx < MAX_TARGET_ACTIONS {
249→ mask.mask[idx] = true;
250→ }
251→ }
252→ if allow_done {
253→ mask.mask[Phase2Action::Done.to_index()] = true;
254→ }
255→ mask
256→ }
257→
258→ /// Create a Phase 2 mode selection mask.
259→ pub fn phase2_mode_mask(legal_mode_indices: &[usize]) -> Self {
260→ let mut mask = ActionMask::new(PHASE2_ACTION_SIZE);
261→ for &idx in legal_mode_indices {
262→ if idx < MAX_MODE_ACTIONS {
263→ mask.mask[MAX_TARGET_ACTIONS + idx] = true;
264→ }
265→ }
266→ mask
267→ }
268→
269→ /// Convert mask to f32 for neural network input (1.0 = legal, 0.0 = illegal).
270→ pub fn as_f32(&self) -> Vec {
271→ self.mask.iter().map(|&b| if b { 1.0 } else { 0.0 }).collect()
272→ }
273→
274→ /// Number of legal (true) actions.
275→ pub fn count_legal(&self) -> usize {
276→ self.mask.iter().filter(|&&b| b).count()
277→ }
278→
279→ /// Whether any action is legal.
280→ pub fn has_legal_action(&self) -> bool {
281→ self.mask.iter().any(|&b| b)
282→ }
283→}
284→
285→// ---------------------------------------------------------------------------
286→// Reward signal
287→// ---------------------------------------------------------------------------
288→
289→/// Compute the reward for the RL agent.
290→///
291→/// Terminal reward: +1.0 for winning, -1.0 for losing.
292→/// Intermediate reward: small signal from life differential to encourage
293→/// the agent to maintain board advantage, scaled down to avoid dominating
294→/// the terminal reward.
295→pub fn compute_reward(
296→ game_over: bool,
297→ won: bool,
298→ own_life: i32,
299→ opponent_life: i32,
```
## Assistant
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src",
"pattern": "fn choose_targets"
}
```
## Assistant
**Result** (success):
```
mtg-ai/src/minimax_player.rs:317: fn choose_targets(
mtg-ai/src/heuristic_player.rs:96: fn choose_targets(
mtg-ai/src/random_player.rs:68: fn choose_targets(
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src/heuristic_player.rs",
"limit": 25,
"offset": 96
}
```
## Assistant
**Result** (success):
```
96→ fn choose_targets(
97→ &mut self,
98→ _game: &GameView<'_>,
99→ outcome: Outcome,
100→ requirement: &TargetRequirement,
101→ ) -> Vec {
102→ // Heuristic target selection based on outcome:
103→ // - Good outcomes (boost, protect, etc.): prefer own permanents
104→ // (since we can't distinguish own vs opponent here without game state,
105→ // we pick from the front of the list which the engine typically
106→ // orders by priority)
107→ // - Bad outcomes (destroy, damage, etc.): prefer opponent permanents
108→ // (pick from the back of the list)
109→ //
110→ // When the full game state is available, this will use the evaluator
111→ // to score each potential target and pick the best.
112→
113→ let count = requirement.min_targets.min(requirement.legal_targets.len());
114→ if count == 0 {
115→ return Vec::new();
116→ }
117→
118→ if outcome.is_good() {
119→ // For good effects, pick targets from the beginning (typically own stuff)
120→ requirement.legal_targets[..count].to_vec()
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai/src/random_player.rs",
"limit": 25,
"offset": 68
}
```
## Assistant
**Result** (success):
```
68→ fn choose_targets(
69→ &mut self,
70→ _game: &GameView<'_>,
71→ _outcome: Outcome,
72→ requirement: &TargetRequirement,
73→ ) -> Vec {
74→ // Pick a random count between min and max, then choose that many targets.
75→ let count = if requirement.min_targets == requirement.max_targets {
76→ requirement.min_targets
77→ } else {
78→ self.rng
79→ .gen_range(requirement.min_targets..=requirement.max_targets)
80→ };
81→ let count = count.min(requirement.legal_targets.len());
82→ self.pick_n(&requirement.legal_targets, count)
83→ }
84→
85→ fn choose_use(
86→ &mut self,
87→ _game: &GameView<'_>,
88→ _outcome: Outcome,
89→ _message: &str,
90→ ) -> bool {
91→ self.rng.gen_bool(0.5)
92→ }
```
## Assistant
Good — the heuristic and random players already implement `choose_targets`. Now let me look at `Outcome` to understand the good/bad distinction:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/decision.rs",
"pattern": "pub enum Outcome|fn is_good"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src",
"pattern": "enum Outcome|fn is_good"
}
```
## Assistant
**Result** (success):
```
mtg-engine/src/constants.rs:688:pub enum Outcome {
mtg-engine/src/constants.rs:730: pub fn is_good(self) -> bool {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/constants.rs",
"limit": 55,
"offset": 688
}
```
## Assistant
**Result** (success):
```
688→pub enum Outcome {
689→ Damage,
690→ DestroyPermanent,
691→ BoostCreature,
692→ UnboostCreature,
693→ AddAbility,
694→ LoseAbility,
695→ GainLife,
696→ LoseLife,
697→ ExtraTurn,
698→ BecomeCreature,
699→ PutCreatureInPlay,
700→ PutCardInPlay,
701→ PutLandInPlay,
702→ GainControl,
703→ DrawCard,
704→ Discard,
705→ Sacrifice,
706→ PlayForFree,
707→ ReturnToHand,
708→ Exile,
709→ Protect,
710→ PutManaInPool,
711→ Regenerate,
712→ PreventDamage,
713→ PreventCast,
714→ RedirectDamage,
715→ Tap,
716→ Transform,
717→ Untap,
718→ Win,
719→ Copy,
720→ Benefit,
721→ Detriment,
722→ Neutral,
723→ Removal,
724→ AIDontUseIt,
725→ Vote,
726→}
727→
728→impl Outcome {
729→ /// Whether this outcome is good for the target of the effect.
730→ pub fn is_good(self) -> bool {
731→ matches!(
732→ self,
733→ Outcome::BoostCreature
734→ | Outcome::AddAbility
735→ | Outcome::GainLife
736→ | Outcome::ExtraTurn
737→ | Outcome::BecomeCreature
738→ | Outcome::PutCreatureInPlay
739→ | Outcome::PutCardInPlay
740→ | Outcome::PutLandInPlay
741→ | Outcome::DrawCard
742→ | Outcome::PlayForFree
```
## Assistant
Now I have the full picture. Let me implement the fix. The plan:
1. Add `TargetSpec::CreatureYouControl` and `TargetSpec::OpponentCreature`
2. Add `TargetSpec::fight_targets()` builder
3. Add `resolve_targets_for_spec()` helper in game.rs
4. Wire up target selection in `cast_spell()`
5. Update Fight/Bite to use explicit targets from the stack
6. Update card definitions
7. Update tests
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"limit": 30,
"offset": 192
}
```
## Assistant
**Result** (success):
```
192→}
193→
194→// ---------------------------------------------------------------------------
195→// Target specification for abilities
196→// ---------------------------------------------------------------------------
197→
198→/// Describes what an ability can target.
199→#[derive(Clone, Debug, Serialize, Deserialize)]
200→pub enum TargetSpec {
201→ /// No targets.
202→ None,
203→ /// Target creature.
204→ Creature,
205→ /// Target creature or player.
206→ CreatureOrPlayer,
207→ /// Target player.
208→ Player,
209→ /// Target permanent.
210→ Permanent,
211→ /// Target permanent matching a filter.
212→ PermanentFiltered(String),
213→ /// Target spell on the stack.
214→ Spell,
215→ /// Target card in a graveyard.
216→ CardInGraveyard,
217→ /// Target card in your graveyard.
218→ CardInYourGraveyard,
219→ /// Multiple targets of the same type.
220→ Multiple { spec: Box, count: usize },
221→ /// Custom targeting (described by text).
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"new_string": " /// Target creature you control.\n CreatureYouControl,\n /// Target creature you don't control (opponent's creature).\n OpponentCreature,\n /// Two targets (e.g. fight spells: your creature + opponent's creature).\n /// targets[0] comes from `first`, targets[1] from `second`.\n Pair { first: Box, second: Box },\n /// Multiple targets of the same type.\n Multiple { spec: Box, count: usize },\n /// Custom targeting (described by text).\n Custom(String),",
"old_string": " /// Multiple targets of the same type.\n Multiple { spec: Box, count: usize },\n /// Custom targeting (described by text).\n Custom(String),",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs has been updated successfully.
```
## Assistant
Now add a builder for fight targets:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"limit": 10,
"offset": 828
}
```
## Assistant
**Result** (success):
```
828→ }
829→
830→ /// "[Spell type] spells you cast cost {N} less."
831→ pub fn cost_reduction(filter: &str, amount: u32) -> Self {
832→ StaticEffect::CostReduction {
833→ filter: filter.to_string(),
834→ amount,
835→ }
836→ }
837→
```
## Assistant
I need to add a builder for TargetSpec. Let me add it after the StaticEffect builders:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"pattern": "^impl Cost \\{"
}
```
## Assistant
**Result** (success):
```
857:impl Cost {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"limit": 10,
"offset": 848
}
```
## Assistant
**Result** (success):
```
848→ condition: condition.to_string(),
849→ }
850→ }
851→}
852→
853→// ---------------------------------------------------------------------------
854→// Common cost builders
855→// ---------------------------------------------------------------------------
856→
857→impl Cost {
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"new_string": "// ---------------------------------------------------------------------------\n// Common target spec builders\n// ---------------------------------------------------------------------------\n\nimpl TargetSpec {\n /// Fight/Bite targeting: \"target creature you control\" + \"target creature you don't control\".\n pub fn fight_targets() -> Self {\n TargetSpec::Pair {\n first: Box::new(TargetSpec::CreatureYouControl),\n second: Box::new(TargetSpec::OpponentCreature),\n }\n }\n}\n\n// ---------------------------------------------------------------------------\n// Common cost builders\n// ---------------------------------------------------------------------------\n\nimpl Cost {",
"old_string": "// ---------------------------------------------------------------------------\n// Common cost builders\n// ---------------------------------------------------------------------------\n\nimpl Cost {",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs has been updated successfully.
```
## Assistant
Now the big part — wire up target selection in `cast_spell()` and the trigger resolution path. Let me add a `select_targets_for_spec()` method and update `cast_spell()`:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 35,
"offset": 654
}
```
## Assistant
**Result** (success):
```
654→ fn cast_spell(&mut self, player_id: PlayerId, card_id: ObjectId) {
655→ let card_data = match self.state.card_store.get(card_id).cloned() {
656→ Some(c) => c,
657→ None => return,
658→ };
659→
660→ // Remove from hand
661→ if let Some(player) = self.state.players.get_mut(&player_id) {
662→ if !player.hand.remove(card_id) {
663→ return;
664→ }
665→
666→ // Pay mana cost
667→ let mana_cost = card_data.mana_cost.to_mana();
668→ if !player.mana_pool.try_pay(&mana_cost) {
669→ // Can't pay — put card back in hand
670→ player.hand.add(card_id);
671→ return;
672→ }
673→ }
674→
675→ // Put on the stack
676→ let stack_item = crate::zones::StackItem {
677→ id: card_id,
678→ kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },
679→ controller: player_id,
680→ targets: vec![],
681→ countered: false,
682→ };
683→ self.state.stack.push(stack_item);
684→ self.state.set_zone(card_id, crate::constants::Zone::Stack, None);
685→ }
686→
687→ /// Resolve the top item on the stack.
688→ fn resolve_top_of_stack(&mut self) {
```
## Assistant
Now I need to add target selection. The cleanest approach: extract the spell's TargetSpec, build legal targets, ask the decision maker, and put them on the stack.
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " // Select targets based on the spell's TargetSpec\n let target_spec = card_data\n .abilities\n .iter()\n .find(|a| a.ability_type == AbilityType::Spell)\n .map(|a| a.targets.clone())\n .unwrap_or(crate::abilities::TargetSpec::None);\n let targets = self.select_targets_for_spec(&target_spec, player_id);\n\n // Put on the stack\n let stack_item = crate::zones::StackItem {\n id: card_id,\n kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },\n controller: player_id,\n targets,\n countered: false,\n };\n self.state.stack.push(stack_item);\n self.state.set_zone(card_id, crate::constants::Zone::Stack, None);\n }",
"old_string": " // Put on the stack\n let stack_item = crate::zones::StackItem {\n id: card_id,\n kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },\n controller: player_id,\n targets: vec![],\n countered: false,\n };\n self.state.stack.push(stack_item);\n self.state.set_zone(card_id, crate::constants::Zone::Stack, None);\n }",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now I need to add the `select_targets_for_spec` method and update the trigger path too. Let me also check the trigger path:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn process_triggers|fn check_triggers|trigger.*stack"
}
```
## Assistant
**Result** (success):
```
10:// 4. Put triggered abilities on the stack
354: // TODO: Put triggered abilities on the stack (task #13)
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 50,
"offset": 340
}
```
## Assistant
**Result** (success):
```
340→ }
341→
342→ /// Process the current step: turn-based actions, SBAs, triggers, priority.
343→ fn process_step(&mut self) {
344→ let step = self.state.current_step;
345→ let active = self.state.active_player;
346→
347→ // -- Turn-based actions --
348→ self.turn_based_actions(step, active);
349→
350→ // -- Check state-based actions (loop until stable) --
351→ self.process_state_based_actions();
352→
353→ // -- Handle triggered abilities --
354→ // TODO: Put triggered abilities on the stack (task #13)
355→
356→ // -- Priority loop --
357→ if has_priority(step) {
358→ self.priority_loop();
359→ }
360→ }
361→
362→ /// Execute turn-based actions for a step.
363→ fn turn_based_actions(&mut self, step: PhaseStep, active_player: PlayerId) {
364→ match step {
365→ PhaseStep::Untap => {
366→ // Untap all permanents controlled by the active player
367→ for perm in self.state.battlefield.iter_mut() {
368→ if perm.controller == active_player {
369→ perm.untap();
370→ perm.remove_summoning_sickness();
371→ }
372→ }
373→ // Empty mana pool (normally happens at end of each step, but
374→ // also at untap for clarity)
375→ if let Some(player) = self.state.players.get_mut(&active_player) {
376→ player.mana_pool.clear();
377→ }
378→ }
379→ PhaseStep::Draw => {
380→ // Active player draws a card
381→ // Skip draw on turn 1 for the starting player (two-player rule)
382→ if self.turn_manager.turn_number > 1 || self.state.turn_order[0] != active_player {
383→ self.draw_cards(active_player, 1);
384→ }
385→ }
386→ PhaseStep::Cleanup => {
387→ // Discard down to max hand size
388→ let discard_info = self
389→ .state
```
## Assistant
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"head_limit": 20,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "trigger|EventType::EnteredTheBattlefield"
}
```
## Assistant
**Result** (success):
```
10:// 4. Put triggered abilities on the stack
342: /// Process the current step: turn-based actions, SBAs, triggers, priority.
353: // -- Handle triggered abilities --
354: // TODO: Put triggered abilities on the stack (task #13)
[Showing results with pagination = limit: 20, offset: 0]
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "EnteredTheBattlefield|enters.*battlefield.*trigger|emit.*event|fire.*trigger"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn.*permanent.*enter|enters.*battle|resolve_top.*card.*permanent"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 35,
"offset": 724
}
```
## Assistant
**Result** (success):
```
724→ }
725→ crate::zones::StackItemKind::Ability { .. } => {
726→ // Abilities just cease to exist when fizzled
727→ }
728→ }
729→ return;
730→ }
731→ }
732→
733→ match &item.kind {
734→ crate::zones::StackItemKind::Spell { card } => {
735→ if card.is_permanent_card() {
736→ // Register abilities from the card
737→ for ability in &card.abilities {
738→ self.state.ability_store.add(ability.clone());
739→ }
740→ // Permanent spells enter the battlefield
741→ let perm = Permanent::new(card.clone(), item.controller);
742→ self.state.battlefield.add(perm);
743→ self.state.set_zone(item.id, crate::constants::Zone::Battlefield, None);
744→ } else {
745→ // Non-permanent spells: execute effects then go to graveyard
746→ let effects: Vec = card.abilities.iter()
747→ .flat_map(|a| a.effects.clone())
748→ .collect();
749→ let targets = item.targets.clone();
750→ self.execute_effects(&effects, item.controller, &targets, Some(item.id));
751→ self.move_card_to_graveyard(item.id, item.controller);
752→ }
753→ }
754→ crate::zones::StackItemKind::Ability { ability_id, source_id, .. } => {
755→ // Resolve ability: find its effects and execute them
756→ let source = *source_id;
757→ let ability_data = self.state.ability_store.get(*ability_id).cloned();
758→ if let Some(ability) = ability_data {
```
## Assistant
## Assistant
Now let me add the `select_targets_for_spec` method. I'll put it near the other helper methods:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 10,
"offset": 1645
}
```
## Assistant
**Result** (success):
```
1645→ false
1646→ }
1647→
1648→ /// Find the "fighter" creature for Fight/Bite effects.
1649→ /// If source is a creature on the battlefield, use it.
1650→ /// Otherwise, pick controller's creature with highest power.
1651→ fn find_fight_creature(
1652→ state: &GameState,
1653→ source: Option,
1654→ controller: PlayerId,
```
## Assistant
I'll add `select_targets_for_spec` before the fight helpers:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " /// Select targets for a spell/ability based on its TargetSpec.\n ///\n /// Builds the list of legal targets for the spec, asks the decision maker\n /// to choose, and returns the selected ObjectIds. For `Pair` specs, the\n /// first target comes from `first` and the second from `second`.\n fn select_targets_for_spec(\n &mut self,\n spec: &crate::abilities::TargetSpec,\n controller: PlayerId,\n ) -> Vec {\n use crate::abilities::TargetSpec;\n\n match spec {\n TargetSpec::None => vec![],\n TargetSpec::Pair { first, second } => {\n let mut result = Vec::new();\n let first_targets = self.select_targets_for_spec(first, controller);\n result.extend(&first_targets);\n let second_targets = self.select_targets_for_spec(second, controller);\n result.extend(&second_targets);\n result\n }\n _ => {\n let legal = self.legal_targets_for_spec(spec, controller);\n if legal.is_empty() {\n return vec![];\n }\n let requirement = crate::decision::TargetRequirement {\n description: Self::target_spec_description(spec),\n legal_targets: legal,\n min_targets: 1,\n max_targets: 1,\n required: true,\n };\n let outcome = Self::target_spec_outcome(spec);\n let view = crate::decision::GameView::placeholder();\n let chosen = if let Some(dm) = self.decision_makers.get_mut(&controller) {\n dm.choose_targets(&view, outcome, &requirement)\n } else {\n // Fallback: pick the first legal target\n requirement.legal_targets.into_iter().take(1).collect()\n };\n // If decision maker returned empty, fall back to first legal target\n if chosen.is_empty() {\n // Re-build legal targets since requirement was moved\n let legal = self.legal_targets_for_spec(spec, controller);\n legal.into_iter().take(1).collect()\n } else {\n chosen\n }\n }\n }\n }\n\n /// Build the list of legal target ObjectIds for a given TargetSpec.\n fn legal_targets_for_spec(\n &self,\n spec: &crate::abilities::TargetSpec,\n controller: PlayerId,\n ) -> Vec {\n use crate::abilities::TargetSpec;\n match spec {\n TargetSpec::Creature => self\n .state\n .battlefield\n .iter()\n .filter(|p| p.is_creature())\n .map(|p| p.id())\n .collect(),\n TargetSpec::CreatureYouControl => self\n .state\n .battlefield\n .iter()\n .filter(|p| p.is_creature() && p.controller == controller)\n .map(|p| p.id())\n .collect(),\n TargetSpec::OpponentCreature => self\n .state\n .battlefield\n .iter()\n .filter(|p| p.is_creature() && p.controller != controller)\n .map(|p| p.id())\n .collect(),\n TargetSpec::CreatureOrPlayer => {\n let mut targets: Vec = self\n .state\n .battlefield\n .iter()\n .filter(|p| p.is_creature())\n .map(|p| p.id())\n .collect();\n // Player targeting would need a different mechanism;\n // for now, just return creature targets\n targets.sort(); // deterministic ordering\n targets\n }\n TargetSpec::Permanent => self\n .state\n .battlefield\n .iter()\n .map(|p| p.id())\n .collect(),\n TargetSpec::PermanentFiltered(filter) => self\n .state\n .battlefield\n .iter()\n .filter(|p| Self::matches_filter(p, filter))\n .map(|p| p.id())\n .collect(),\n TargetSpec::Spell => self\n .state\n .stack\n .iter()\n .map(|item| item.id)\n .collect(),\n _ => vec![], // None, CardInGraveyard, Multiple, Custom, Pair — handled elsewhere\n }\n }\n\n /// Human-readable description for a TargetSpec.\n fn target_spec_description(spec: &crate::abilities::TargetSpec) -> String {\n use crate::abilities::TargetSpec;\n match spec {\n TargetSpec::Creature => \"target creature\".into(),\n TargetSpec::CreatureYouControl => \"target creature you control\".into(),\n TargetSpec::OpponentCreature => \"target creature you don't control\".into(),\n TargetSpec::CreatureOrPlayer => \"target creature or player\".into(),\n TargetSpec::Permanent => \"target permanent\".into(),\n TargetSpec::PermanentFiltered(f) => format!(\"target {}\", f),\n TargetSpec::Spell => \"target spell\".into(),\n _ => \"target\".into(),\n }\n }\n\n /// Determine the Outcome for a TargetSpec (used to inform AI target choice).\n fn target_spec_outcome(spec: &crate::abilities::TargetSpec) -> crate::constants::Outcome {\n use crate::abilities::TargetSpec;\n use crate::constants::Outcome;\n match spec {\n TargetSpec::CreatureYouControl => Outcome::Benefit,\n TargetSpec::OpponentCreature => Outcome::Removal,\n _ => Outcome::Detriment, // Default: assume targeting opponents\n }\n }\n\n /// Find the \"fighter\" creature for Fight/Bite effects.\n /// If source is a creature on the battlefield, use it.\n /// Otherwise, pick controller's creature with highest power.\n fn find_fight_creature(",
"old_string": " /// Find the \"fighter\" creature for Fight/Bite effects.\n /// If source is a creature on the battlefield, use it.\n /// Otherwise, pick controller's creature with highest power.\n fn find_fight_creature(",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now update the Fight/Bite match arms to use `targets[0]` and `targets[1]` when available (two-target mode), falling back to the old behavior for ETB triggers (source + target):
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "Effect::Fight =>\""
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "Effect::Fight"
}
```
## Assistant
**Result** (success):
```
1452: Effect::Fight => {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 50,
"offset": 1452
}
```
## Assistant
**Result** (success):
```
1452→ Effect::Fight => {
1453→ // Fight: source creature and target creature each deal damage
1454→ // equal to their power to each other.
1455→ // Determine "your creature" (fighter):
1456→ // - If source is a creature on the battlefield, use it
1457→ // - Otherwise, pick controller's creature with highest power
1458→ // Determine "their creature" (target):
1459→ // - First target on the battlefield
1460→ // - If no targets, pick opponent's creature with highest power
1461→ let fighter_id = Self::find_fight_creature(&self.state, source, controller);
1462→ let target_id = Self::find_fight_target(&self.state, targets, controller);
1463→
1464→ if let (Some(fid), Some(tid)) = (fighter_id, target_id) {
1465→ if fid != tid {
1466→ // Read both powers first
1467→ let fighter_power = self.state.battlefield.get(fid)
1468→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1469→ let target_power = self.state.battlefield.get(tid)
1470→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1471→ // Apply damage: fighter deals its power to target
1472→ if let Some(target_perm) = self.state.battlefield.get_mut(tid) {
1473→ target_perm.apply_damage(fighter_power);
1474→ }
1475→ // Apply damage: target deals its power to fighter
1476→ if let Some(fighter_perm) = self.state.battlefield.get_mut(fid) {
1477→ fighter_perm.apply_damage(target_power);
1478→ }
1479→ }
1480→ }
1481→ }
1482→ Effect::Bite => {
1483→ // Bite: source creature deals damage equal to its power to target
1484→ // creature (one-way; the target does not deal damage back).
1485→ let biter_id = Self::find_fight_creature(&self.state, source, controller);
1486→ let target_id = Self::find_fight_target(&self.state, targets, controller);
1487→
1488→ if let (Some(bid), Some(tid)) = (biter_id, target_id) {
1489→ if bid != tid {
1490→ let biter_power = self.state.battlefield.get(bid)
1491→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1492→ if let Some(target_perm) = self.state.battlefield.get_mut(tid) {
1493→ target_perm.apply_damage(biter_power);
1494→ }
1495→ }
1496→ }
1497→ }
1498→ _ => {
1499→ // Remaining effects not yet implemented (gain control, protection, etc.)
1500→ }
1501→ }
```
## Assistant
Now replace the Fight/Bite match arms with versions that use explicit targets when available:
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " Effect::Fight => {\n // Fight: two creatures deal damage equal to their power to each other.\n //\n // Target resolution (matches Java FightTargetsEffect):\n // - If targets has 2+ entries: targets[0] = your creature, targets[1] = opponent's\n // - If targets has 1 entry + source is creature: source fights targets[0]\n // - Fallback: auto-select strongest on each side\n let (fighter_id, target_id) = Self::resolve_fight_pair(\n &self.state, targets, source, controller,\n );\n\n if let (Some(fid), Some(tid)) = (fighter_id, target_id) {\n if fid != tid {\n let fighter_power = self.state.battlefield.get(fid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n let target_power = self.state.battlefield.get(tid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(fighter_power);\n }\n if let Some(fighter_perm) = self.state.battlefield.get_mut(fid) {\n fighter_perm.apply_damage(target_power);\n }\n }\n }\n }\n Effect::Bite => {\n // Bite: source creature deals damage equal to its power to target\n // creature (one-way; the target does not deal damage back).\n // Same target resolution as Fight.\n let (biter_id, target_id) = Self::resolve_fight_pair(\n &self.state, targets, source, controller,\n );\n\n if let (Some(bid), Some(tid)) = (biter_id, target_id) {\n if bid != tid {\n let biter_power = self.state.battlefield.get(bid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(biter_power);\n }\n }\n }\n }",
"old_string": " Effect::Fight => {\n // Fight: source creature and target creature each deal damage\n // equal to their power to each other.\n // Determine \"your creature\" (fighter):\n // - If source is a creature on the battlefield, use it\n // - Otherwise, pick controller's creature with highest power\n // Determine \"their creature\" (target):\n // - First target on the battlefield\n // - If no targets, pick opponent's creature with highest power\n let fighter_id = Self::find_fight_creature(&self.state, source, controller);\n let target_id = Self::find_fight_target(&self.state, targets, controller);\n\n if let (Some(fid), Some(tid)) = (fighter_id, target_id) {\n if fid != tid {\n // Read both powers first\n let fighter_power = self.state.battlefield.get(fid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n let target_power = self.state.battlefield.get(tid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n // Apply damage: fighter deals its power to target\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(fighter_power);\n }\n // Apply damage: target deals its power to fighter\n if let Some(fighter_perm) = self.state.battlefield.get_mut(fid) {\n fighter_perm.apply_damage(target_power);\n }\n }\n }\n }\n Effect::Bite => {\n // Bite: source creature deals damage equal to its power to target\n // creature (one-way; the target does not deal damage back).\n let biter_id = Self::find_fight_creature(&self.state, source, controller);\n let target_id = Self::find_fight_target(&self.state, targets, controller);\n\n if let (Some(bid), Some(tid)) = (biter_id, target_id) {\n if bid != tid {\n let biter_power = self.state.battlefield.get(bid)\n .map(|p| p.power().max(0) as u32).unwrap_or(0);\n if let Some(target_perm) = self.state.battlefield.get_mut(tid) {\n target_perm.apply_damage(biter_power);\n }\n }\n }\n }",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now replace the old `find_fight_creature` and `find_fight_target` with a unified `resolve_fight_pair`:
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "fn find_fight_creature|fn find_fight_target\""
}
```
## Assistant
**Result** (success):
```
1794: fn find_fight_creature(
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 50,
"offset": 1794
}
```
## Assistant
**Result** (success):
```
1794→ fn find_fight_creature(
1795→ state: &GameState,
1796→ source: Option,
1797→ controller: PlayerId,
1798→ ) -> Option {
1799→ // Check if source is a creature on the battlefield
1800→ if let Some(sid) = source {
1801→ if let Some(perm) = state.battlefield.get(sid) {
1802→ if perm.is_creature() {
1803→ return Some(sid);
1804→ }
1805→ }
1806→ }
1807→ // Fallback: pick controller's creature with highest power
1808→ state
1809→ .battlefield
1810→ .iter()
1811→ .filter(|p| p.controller == controller && p.is_creature())
1812→ .max_by_key(|p| p.power())
1813→ .map(|p| p.id())
1814→ }
1815→
1816→ /// Find the fight/bite target creature.
1817→ /// If targets contains a creature on the battlefield, use the first one.
1818→ /// Otherwise, pick the strongest opponent creature.
1819→ fn find_fight_target(
1820→ state: &GameState,
1821→ targets: &[ObjectId],
1822→ controller: PlayerId,
1823→ ) -> Option {
1824→ // Check if any target is a creature on the battlefield
1825→ for &tid in targets {
1826→ if let Some(perm) = state.battlefield.get(tid) {
1827→ if perm.is_creature() {
1828→ return Some(tid);
1829→ }
1830→ }
1831→ }
1832→ // Fallback: pick opponent's creature with highest power
1833→ state
1834→ .battlefield
1835→ .iter()
1836→ .filter(|p| p.controller != controller && p.is_creature())
1837→ .max_by_key(|p| p.power())
1838→ .map(|p| p.id())
1839→ }
1840→
1841→ /// Check if the game should end and return a result if so.
1842→ fn check_game_end(&self) -> Option {
1843→ if !self.state.should_end() {
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " /// Resolve the fighter/target pair for Fight/Bite effects.\n ///\n /// Mirrors Java's FightTargetsEffect: uses two explicit targets when\n /// available (targets[0] = your creature, targets[1] = opponent's creature).\n /// Falls back to source creature for ETB triggers, or auto-selects\n /// strongest creatures as last resort.\n fn resolve_fight_pair(\n state: &GameState,\n targets: &[ObjectId],\n source: Option,\n controller: PlayerId,\n ) -> (Option, Option) {\n // Two explicit targets from TargetSpec::Pair selection:\n // targets[0] = creature you control, targets[1] = creature opponent controls\n if targets.len() >= 2 {\n let t0 = state.battlefield.get(targets[0]).map(|_| targets[0]);\n let t1 = state.battlefield.get(targets[1]).map(|_| targets[1]);\n if t0.is_some() && t1.is_some() {\n return (t0, t1);\n }\n }\n\n // Single target + source creature (ETB triggers like Affectionate Indrik):\n // source = the creature, targets[0] = opponent's creature\n if targets.len() == 1 {\n if let Some(sid) = source {\n if state.battlefield.get(sid).map_or(false, |p| p.is_creature()) {\n let tid = state.battlefield.get(targets[0]).map(|_| targets[0]);\n return (Some(sid), tid);\n }\n }\n }\n\n // Fallback: auto-select strongest creatures on each side\n let fighter = state\n .battlefield\n .iter()\n .filter(|p| p.controller == controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id());\n let target = state\n .battlefield\n .iter()\n .filter(|p| p.controller != controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id());\n (fighter, target)\n }",
"old_string": " /// Find the \"fighter\" creature for Fight/Bite effects.\n /// If source is a creature on the battlefield, use it.\n /// Otherwise, pick controller's creature with highest power.\n fn find_fight_creature(\n state: &GameState,\n source: Option,\n controller: PlayerId,\n ) -> Option {\n // Check if source is a creature on the battlefield\n if let Some(sid) = source {\n if let Some(perm) = state.battlefield.get(sid) {\n if perm.is_creature() {\n return Some(sid);\n }\n }\n }\n // Fallback: pick controller's creature with highest power\n state\n .battlefield\n .iter()\n .filter(|p| p.controller == controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id())\n }\n\n /// Find the fight/bite target creature.\n /// If targets contains a creature on the battlefield, use the first one.\n /// Otherwise, pick the strongest opponent creature.\n fn find_fight_target(\n state: &GameState,\n targets: &[ObjectId],\n controller: PlayerId,\n ) -> Option {\n // Check if any target is a creature on the battlefield\n for &tid in targets {\n if let Some(perm) = state.battlefield.get(tid) {\n if perm.is_creature() {\n return Some(tid);\n }\n }\n }\n // Fallback: pick opponent's creature with highest power\n state\n .battlefield\n .iter()\n .filter(|p| p.controller != controller && p.is_creature())\n .max_by_key(|p| p.power())\n .map(|p| p.id())\n }",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now update the card definitions to use `TargetSpec::fight_targets()` for fight/bite spells:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo check -p mtg-engine 2>&1",
"description": "Check engine compiles with new targeting",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Checking mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.67s
```
## Assistant
Engine compiles. Now update the fight/bite cards to use `TargetSpec::fight_targets()`:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"Effect::fight\\|Effect::bite\" mtg-cards/src/sets/fdn.rs mtg-cards/src/sets/ecl.rs mtg-cards/src/sets/tdm.rs",
"description": "Find all fight/bite cards to update TargetSpec"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/fdn.rs:2305: vec![Effect::bite()],
mtg-cards/src/sets/fdn.rs:5252: vec![Effect::fight()],
mtg-cards/src/sets/fdn.rs:6017: vec![Effect::add_p1p1_counters(1), Effect::bite()],
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::Creature)],
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::Creature)],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::Creature)],
```
## Assistant
Let me look at the context around each card to update correctly:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 12,
"offset": 2301
}
```
## Assistant
**Result** (success):
```
2301→ CardData { id, owner, name: "Bite Down".into(), mana_cost: ManaCost::parse("{1}{G}"),
2302→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
2303→ abilities: vec![
2304→ Ability::spell(id,
2305→ vec![Effect::bite()],
2306→ TargetSpec::Creature),
2307→ ],
2308→ ..Default::default() }
2309→}
2310→
2311→fn snakeskin_veil(id: ObjectId, owner: PlayerId) -> CardData {
2312→ // Instant {G}. +1/+1 counter on creature you control. It gains hexproof until EOT.
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 12,
"offset": 5247
}
```
## Assistant
**Result** (success):
```
5247→ rarity: Rarity::Common,
5248→ abilities: vec![
5249→ Ability::triggered(id,
5250→ "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5251→ vec![EventType::EnteredTheBattlefield],
5252→ vec![Effect::fight()],
5253→ TargetSpec::Creature),
5254→ ],
5255→ ..Default::default() }
5256→}
5257→
5258→fn ajani_caller_of_the_pride(id: ObjectId, owner: PlayerId) -> CardData {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 10,
"offset": 6013
}
```
## Assistant
**Result** (success):
```
6013→ card_types: vec![CardType::Sorcery],
6014→ rarity: Rarity::Common,
6015→ abilities: vec![
6016→ Ability::spell(id,
6017→ vec![Effect::add_p1p1_counters(1), Effect::bite()],
6018→ TargetSpec::Creature),
6019→ ],
6020→ ..Default::default() }
6021→}
6022→
```
## Assistant
Now update each card. For fight/bite **spells**, use `TargetSpec::fight_targets()`. For **triggered abilities** (Affectionate Indrik), keep `TargetSpec::OpponentCreature` since source is the creature:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "# FDN: Bite Down (line 2306) - spell, needs fight_targets()\nsed -i '2306s|TargetSpec::Creature|TargetSpec::fight_targets()|' mtg-cards/src/sets/fdn.rs\n\n# FDN: Affectionate Indrik (line 5253) - ETB trigger, source is creature, target is opponent\nsed -i '5253s|TargetSpec::Creature|TargetSpec::OpponentCreature|' mtg-cards/src/sets/fdn.rs\n\n# FDN: Felling Blow (line 6018) - spell, needs fight_targets()\nsed -i '6018s|TargetSpec::Creature|TargetSpec::fight_targets()|' mtg-cards/src/sets/fdn.rs",
"description": "Update FDN fight/bite cards to proper TargetSpecs"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "# ECL: Assert Perfection (line 1799) - spell with fight, needs fight_targets()\nsed -i 's|Effect::boost_until_eot(1, 0), Effect::fight()\\], TargetSpec::Creature|Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::fight_targets()|' mtg-cards/src/sets/ecl.rs",
"description": "Update Assert Perfection to fight_targets"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "# TDM: Knockout Maneuver (line 1231) and Piercing Exhale (line 1255)\nsed -i 's|Effect::add_p1p1_counters(1), Effect::fight()\\], TargetSpec::Creature|Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::fight_targets()|' mtg-cards/src/sets/tdm.rs\nsed -i 's|vec!\\[Effect::fight()\\], TargetSpec::Creature|vec![Effect::fight()], TargetSpec::fight_targets()|' mtg-cards/src/sets/tdm.rs",
"description": "Update TDM fight cards to fight_targets"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Let me verify the changes:
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "grep -n \"fight_targets\\|OpponentCreature\\|Effect::fight\\|Effect::bite\" mtg-cards/src/sets/fdn.rs mtg-cards/src/sets/ecl.rs mtg-cards/src/sets/tdm.rs",
"description": "Verify all fight/bite cards updated"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/fdn.rs:2305: vec![Effect::bite()],
mtg-cards/src/sets/fdn.rs:2306: TargetSpec::fight_targets()),
mtg-cards/src/sets/fdn.rs:5252: vec![Effect::fight()],
mtg-cards/src/sets/fdn.rs:5253: TargetSpec::OpponentCreature),
mtg-cards/src/sets/fdn.rs:6017: vec![Effect::add_p1p1_counters(1), Effect::bite()],
mtg-cards/src/sets/fdn.rs:6018: TargetSpec::fight_targets()),
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::fight_targets())],
```
## Assistant
Good. Now let me also handle the compound cards (Knockout Maneuver, Felling Blow, Assert Perfection). For these, the `add_p1p1_counters(1)` or `boost_until_eot(1, 0)` effect currently goes to `targets`, but now `targets[0]` is "your creature" and `targets[1]` is "opponent's creature". The counter/boost should go to YOUR creature (targets[0]), which is actually correct now — `AddCounters` applies to targets, and targets[0] IS the controller's creature. Let me verify that's how it works:
Looking at the `AddCounters` match arm — it applies to `targets` (all of them) or falls back to `source`. With fight_targets, `targets[0]` = your creature, `targets[1]` = opponent's creature. So `add_p1p1_counters(1)` would put a counter on BOTH creatures. That's wrong — it should only go on your creature.
This is the compound effect problem. I need to think about how to handle this. In Java, Knockout Maneuver uses a specific effect class that handles the counter + fight as one unit, with the counter going to the first target.
For our engine, the simplest fix: the `AddCounters` should only apply to the first target when used with fight. But the engine doesn't know that — it applies to all targets.
Let me check if this is actually a problem by looking at how effects chain with targets:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 15,
"offset": 1040
}
```
## Assistant
**Result** (success):
```
1040→ .filter(|&&id| id != controller)
1041→ .copied()
1042→ .collect();
1043→ for opp in opponents {
1044→ if let Some(player) = self.state.players.get_mut(&opp) {
1045→ player.life -= *amount as i32;
1046→ }
1047→ }
1048→ }
1049→ Effect::AddCounters { counter_type, count } => {
1050→ let ct = crate::counters::CounterType::from_name(counter_type);
1051→ // If no targets, fall back to source (self-targeting counters)
1052→ let effective_targets: Vec = if targets.is_empty() {
1053→ source.into_iter().collect()
1054→ } else {
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 15,
"offset": 1049
}
```
## Assistant
**Result** (success):
```
1049→ Effect::AddCounters { counter_type, count } => {
1050→ let ct = crate::counters::CounterType::from_name(counter_type);
1051→ // If no targets, fall back to source (self-targeting counters)
1052→ let effective_targets: Vec = if targets.is_empty() {
1053→ source.into_iter().collect()
1054→ } else {
1055→ targets.to_vec()
1056→ };
1057→ for target_id in effective_targets {
1058→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1059→ perm.add_counters(ct.clone(), *count);
1060→ }
1061→ }
1062→ }
1063→ Effect::BoostUntilEndOfTurn { power, toughness: _ } => {
```
## Assistant
## Assistant
Let me check how Java handles the compound case (counter + fight):
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards",
"pattern": "class KnockoutManeuver|KnockoutManeuver extends\""
}
```
## Assistant
**Result** (success):
```
Found 1 file
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/k/KnockoutManeuver.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/k/KnockoutManeuver.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.cards.k;
2→
3→import mage.abilities.effects.common.DamageWithPowerFromOneToAnotherTargetEffect;
4→import mage.abilities.effects.common.counter.AddCountersTargetEffect;
5→import mage.cards.CardImpl;
6→import mage.cards.CardSetInfo;
7→import mage.constants.CardType;
8→import mage.counters.CounterType;
9→import mage.target.common.TargetControlledCreaturePermanent;
10→import mage.target.common.TargetOpponentsCreaturePermanent;
11→
12→import java.util.UUID;
13→
14→/**
15→ * @author TheElk801
16→ */
17→public final class KnockoutManeuver extends CardImpl {
18→
19→ public KnockoutManeuver(UUID ownerId, CardSetInfo setInfo) {
20→ super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{2}{G}");
21→
22→ // Put a +1/+1 counter on target creature you control, then it deals damage equal to its power to target creature an opponent controls.
23→ this.getSpellAbility().addEffect(new AddCountersTargetEffect(CounterType.P1P1.createInstance()));
24→ this.getSpellAbility().addEffect(new DamageWithPowerFromOneToAnotherTargetEffect(", then it"));
25→ this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
26→ this.getSpellAbility().addTarget(new TargetOpponentsCreaturePermanent());
27→ }
28→
29→ private KnockoutManeuver(final KnockoutManeuver card) {
30→ super(card);
31→ }
32→
33→ @Override
34→ public KnockoutManeuver copy() {
35→ return new KnockoutManeuver(this);
36→ }
37→}
38→
```
## Assistant
## Assistant
Interesting — Java's Knockout Maneuver uses **Bite** (`DamageWithPowerFromOneToAnotherTargetEffect`), not Fight! Let me also check the Java for Piercing Exhale and Assert Perfection:
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards",
"pattern": "class PiercingExhale|class AssertPerfection\""
}
```
## Assistant
**Result** (success):
```
Found 1 file
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/p/PiercingExhale.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/p/PiercingExhale.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.cards.p;
2→
3→import mage.abilities.condition.common.BeheldDragonCondition;
4→import mage.abilities.decorator.ConditionalOneShotEffect;
5→import mage.abilities.effects.common.DamageWithPowerFromOneToAnotherTargetEffect;
6→import mage.abilities.effects.keyword.SurveilEffect;
7→import mage.abilities.keyword.BeholdAbility;
8→import mage.cards.CardImpl;
9→import mage.cards.CardSetInfo;
10→import mage.constants.CardType;
11→import mage.constants.SubType;
12→import mage.target.common.TargetControlledCreaturePermanent;
13→import mage.target.common.TargetCreatureOrPlaneswalker;
14→
15→import java.util.UUID;
16→
17→/**
18→ * @author TheElk801
19→ */
20→public final class PiercingExhale extends CardImpl {
21→
22→ public PiercingExhale(UUID ownerId, CardSetInfo setInfo) {
23→ super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{1}{G}");
24→
25→ // As an additional cost to cast this spell, you may behold a Dragon.
26→ this.addAbility(new BeholdAbility(SubType.DRAGON));
27→
28→ // Target creature you control deals damage equal to its power to target creature or planeswalker. If a Dragon was beheld, surveil 2.
29→ this.getSpellAbility().addEffect(new DamageWithPowerFromOneToAnotherTargetEffect());
30→ this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
31→ this.getSpellAbility().addTarget(new TargetCreatureOrPlaneswalker());
32→ this.getSpellAbility().addEffect(new ConditionalOneShotEffect(
33→ new SurveilEffect(2), BeheldDragonCondition.instance,
34→ "if a Dragon was beheld, surveil 2"
35→ ));
36→ }
37→
38→ private PiercingExhale(final PiercingExhale card) {
39→ super(card);
40→ }
41→
42→ @Override
43→ public PiercingExhale copy() {
44→ return new PiercingExhale(this);
45→ }
46→}
47→
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"output_mode": "files_with_matches",
"path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards",
"pattern": "class FellingBlow|class AssertPerfection"
}
```
## Assistant
**Result** (success):
```
Found 2 files
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/f/FellingBlow.java
/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/a/AssertPerfection.java
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/a/AssertPerfection.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.cards.a;
2→
3→import mage.abilities.effects.common.DamageWithPowerFromOneToAnotherTargetEffect;
4→import mage.abilities.effects.common.continuous.BoostTargetEffect;
5→import mage.cards.CardImpl;
6→import mage.cards.CardSetInfo;
7→import mage.constants.CardType;
8→import mage.target.common.TargetControlledCreaturePermanent;
9→import mage.target.common.TargetOpponentsCreaturePermanent;
10→
11→import java.util.UUID;
12→
13→/**
14→ * @author TheElk801
15→ */
16→public final class AssertPerfection extends CardImpl {
17→
18→ public AssertPerfection(UUID ownerId, CardSetInfo setInfo) {
19→ super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{1}{G}");
20→
21→ // Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to up to one target creature an opponent controls.
22→ this.getSpellAbility().addEffect(new BoostTargetEffect(1, 0));
23→ this.getSpellAbility().addEffect(new DamageWithPowerFromOneToAnotherTargetEffect("it"));
24→ this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
25→ this.getSpellAbility().addTarget(new TargetOpponentsCreaturePermanent(0, 1));
26→ }
27→
28→ private AssertPerfection(final AssertPerfection card) {
29→ super(card);
30→ }
31→
32→ @Override
33→ public AssertPerfection copy() {
34→ return new AssertPerfection(this);
35→ }
36→}
37→
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/f/FellingBlow.java"
}
```
## Assistant
**Result** (success):
```
1→package mage.cards.f;
2→
3→import mage.abilities.effects.common.DamageWithPowerFromOneToAnotherTargetEffect;
4→import mage.abilities.effects.common.counter.AddCountersTargetEffect;
5→import mage.cards.CardImpl;
6→import mage.cards.CardSetInfo;
7→import mage.constants.CardType;
8→import mage.counters.CounterType;
9→import mage.target.common.TargetControlledCreaturePermanent;
10→import mage.target.common.TargetOpponentsCreaturePermanent;
11→
12→import java.util.UUID;
13→
14→/**
15→ *
16→ * @author ciaccona007
17→ */
18→public final class FellingBlow extends CardImpl {
19→
20→ public FellingBlow(UUID ownerId, CardSetInfo setInfo) {
21→ super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{2}{G}");
22→
23→ // Put a +1/+1 counter on target creature you control. Then that creature deals damage equal to its power to target creature an opponent controls.
24→ this.getSpellAbility().addEffect(new AddCountersTargetEffect(CounterType.P1P1.createInstance()));
25→ this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
26→ this.getSpellAbility().addEffect(new DamageWithPowerFromOneToAnotherTargetEffect("that creature").concatBy("Then"));
27→ this.getSpellAbility().addTarget(new TargetOpponentsCreaturePermanent());
28→ }
29→
30→ private FellingBlow(final FellingBlow card) {
31→ super(card);
32→ }
33→
34→ @Override
35→ public FellingBlow copy() {
36→ return new FellingBlow(this);
37→ }
38→}
39→
```
## Assistant
## Assistant
Key finding — **Piercing Exhale, Knockout Maneuver, Assert Perfection, and Felling Blow are ALL Bite, not Fight!** The Java implementations all use `DamageWithPowerFromOneToAnotherTargetEffect` (one-way damage). The original Rust comments incorrectly said "fights". Let me verify Affectionate Indrik is actually Fight:
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/a/AffectionateIndrik.java"
}
```
## User
This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.
Analysis:
Let me chronologically analyze the conversation:
1. **Initial Request**: User asked to read `docs/work-queue.md` and do the next unchecked batch. They provided a detailed 9-step process for each batch.
2. **Batch 8 Identification**: The next unchecked batch was Batch 8: Fight/Bite mechanic. The work queue listed ~10 cards needing fight/bite across FDN, ECL, and TLA.
3. **Engine Investigation**: Read `abilities.rs` and `game.rs` to understand current Effect/StaticEffect variants. Found that Fight/Bite didn't exist yet.
4. **Card Discovery via Grep**: Found fight/bite cards across all 4 set files:
- FDN: Bite Down (bite), Affectionate Indrik (fight ETB), Felling Blow (counter+bite), Primal Might (X-cost+fight)
- ECL: Assert Perfection (boost+fight), modal fight cards
- TDM: Piercing Exhale (fight), Knockout Maneuver (counter+fight), Dragonclaw Strike (double+fight)
- TLA: Earth Rumble (stub, no abilities)
5. **Initial Implementation**: Added `Effect::Fight` and `Effect::Bite` variants with auto-selection heuristic (pick controller's strongest creature, pick opponent's strongest creature). Added `find_fight_creature()` and `find_fight_target()` helpers. Fixed 6 cards. All tests passed (252).
6. **User Feedback - Critical**: User questioned whether the ROADMAP description matches Java implementation. This was the key turning point.
7. **Java Investigation**: Read Java source files:
- `FightTargetsEffect.java`: Uses TWO explicit player-chosen targets
- `DamageWithPowerFromOneToAnotherTargetEffect.java`: Also TWO explicit targets, one-way damage
- `BiteDown.java`: Uses `DamageWithPowerFromOneToAnotherTargetEffect` with two targets
8. **Gap Identified**: Our engine auto-selects strongest creature instead of player choice. Java uses proper two-target selection. Updated ROADMAP to honestly describe the limitation.
9. **User Request to Fix Gap**: User said "Let's fix the gap please"
10. **Deep Architecture Investigation**: Discovered that the entire targeting system is a no-op:
- `cast_spell()` hardcodes `targets: vec![]`
- `compute_legal_actions()` hardcodes `targets: vec![]`
- Phase 2 target selection exists in action_space but is never wired up
- All effects use heuristic fallbacks when targets are empty
11. **Implementing the Fix**:
- Added `TargetSpec::CreatureYouControl`, `TargetSpec::OpponentCreature`, `TargetSpec::Pair`
- Added `TargetSpec::fight_targets()` builder
- Added `select_targets_for_spec()` method in game.rs that builds legal targets and asks decision makers
- Added `legal_targets_for_spec()`, `target_spec_description()`, `target_spec_outcome()` helpers
- Updated `cast_spell()` to extract TargetSpec from spell abilities and select targets
- Replaced `find_fight_creature`/`find_fight_target` with unified `resolve_fight_pair()` that handles three cases: two explicit targets, source+target (ETB), and fallback auto-select
- Updated all 6 card definitions to use `TargetSpec::fight_targets()` (spells) or `TargetSpec::OpponentCreature` (ETB trigger)
12. **Critical Discovery - Wrong Effect Types**: When checking Java source for compound cards, discovered that Piercing Exhale, Knockout Maneuver, Assert Perfection, and Felling Blow ALL use `DamageWithPowerFromOneToAnotherTargetEffect` — they are ALL **Bite** (one-way damage), NOT Fight! Only Affectionate Indrik uses `FightTargetSourceEffect` (mutual damage).
13. **Compound Effect Problem**: With `TargetSpec::fight_targets()`, targets[0]=your creature, targets[1]=opponent's creature. But `AddCounters` applies to ALL targets, so for Knockout Maneuver/Felling Blow, the +1/+1 counter would wrongly go on both creatures.
14. **Java Pattern for Compound Effects**: In Java:
- `AddCountersTargetEffect` applies to target 1 (first target = your creature)
- `DamageWithPowerFromOneToAnotherTargetEffect` uses target 1's power to damage target 2
- Effects have per-effect target assignment, which our engine doesn't support
The conversation was interrupted right as we discovered that:
1. The fight/bite classification was wrong for 4 of 6 cards
2. The compound effect targeting has a bug (counter goes on both creatures)
3. The implementation needs correction
**Current state of code changes (partially applied, NOT yet verified):**
- `abilities.rs`: New TargetSpec variants added, fight_targets() builder added
- `game.rs`: select_targets_for_spec() and helpers added, cast_spell() updated to select targets, resolve_fight_pair() replaces old helpers
- Card files: Updated to use fight_targets()/OpponentCreature TargetSpecs
- Tests: Old tests exist but may need updating for the new behavior
- **Code has NOT been compiled/tested since the latest round of changes**
Summary:
1. Primary Request and Intent:
The user asked to read `docs/work-queue.md` and complete the next unchecked batch (Batch 8: Fight/Bite mechanic) following a 9-step process. After the initial implementation, the user pointed out that the ROADMAP description didn't match Java's implementation, specifically asking "Does the description of the mechanic work the same way as the Java implementation?" After I confirmed it didn't (auto-selection vs. player-chosen two-target), the user explicitly requested: **"Let's fix the gap please"** — meaning implement proper two-target selection matching Java's `FightTargetsEffect` and `DamageWithPowerFromOneToAnotherTargetEffect`.
2. Key Technical Concepts:
- **Fight** (Java `FightTargetsEffect`): Two creatures deal damage equal to their power to each other (mutual). Uses TWO explicit player-chosen targets.
- **Bite** (Java `DamageWithPowerFromOneToAnotherTargetEffect`): Source creature deals damage equal to its power to target (one-way). Also uses TWO explicit targets.
- **TargetSpec system**: Declarative targeting that was defined but never actually used for selection — `cast_spell()` and `compute_legal_actions()` both hardcoded `targets: vec![]`
- **Decision maker pattern**: `choose_targets(&GameView, Outcome, &TargetRequirement) -> Vec` — already implemented in heuristic and random players but never called
- **Compound effect problem**: When effects share a target list, `AddCounters` applies to ALL targets. With fight_targets() producing [your_creature, opponent_creature], counters wrongly go on both.
- **Per-effect target assignment**: Java supports different targets per effect in the same spell. Our engine passes one flat `targets` slice to all effects.
- **CRITICAL DISCOVERY**: Piercing Exhale, Knockout Maneuver, Assert Perfection, and Felling Blow are ALL **Bite** (one-way), NOT Fight. Only Affectionate Indrik is actual Fight. The original Rust comments were wrong.
3. Files and Code Sections:
- **`mtg-engine/src/abilities.rs`** — Core effect/targeting definitions
- Added `Effect::Fight` and `Effect::Bite` variants with constructors
- Added `TargetSpec::CreatureYouControl`, `TargetSpec::OpponentCreature`, `TargetSpec::Pair { first, second }`
- Added `TargetSpec::fight_targets()` builder
```rust
// New TargetSpec variants (added after CardInYourGraveyard):
CreatureYouControl,
OpponentCreature,
Pair { first: Box, second: Box },
// Fight targets builder:
impl TargetSpec {
pub fn fight_targets() -> Self {
TargetSpec::Pair {
first: Box::new(TargetSpec::CreatureYouControl),
second: Box::new(TargetSpec::OpponentCreature),
}
}
}
// Effect constructors:
pub fn fight() -> Self { Effect::Fight }
pub fn bite() -> Self { Effect::Bite }
```
- **`mtg-engine/src/game.rs`** — Game engine, effect resolution, targeting
- Updated `cast_spell()` to extract TargetSpec from spell abilities and call `select_targets_for_spec()`
```rust
// In cast_spell(), before putting on stack:
let target_spec = card_data
.abilities
.iter()
.find(|a| a.ability_type == AbilityType::Spell)
.map(|a| a.targets.clone())
.unwrap_or(crate::abilities::TargetSpec::None);
let targets = self.select_targets_for_spec(&target_spec, player_id);
```
- Added `select_targets_for_spec()` — builds legal targets, asks decision maker via `choose_targets()`, with fallback
- Added `legal_targets_for_spec()` — maps TargetSpec variants to battlefield queries
- Added `target_spec_description()` and `target_spec_outcome()` helpers
- Replaced `find_fight_creature()`/`find_fight_target()` with `resolve_fight_pair()`:
```rust
fn resolve_fight_pair(
state: &GameState, targets: &[ObjectId],
source: Option, controller: PlayerId,
) -> (Option, Option) {
// Two explicit targets from TargetSpec::Pair selection
if targets.len() >= 2 { /* use targets[0] and targets[1] */ }
// Single target + source creature (ETB triggers)
if targets.len() == 1 { /* source fights targets[0] */ }
// Fallback: auto-select strongest on each side
}
```
- Fight/Bite match arms updated to use `resolve_fight_pair()` instead of old helpers
- Tests added: `fight_and_bite_effects`, `fight_auto_selects_creatures` (from initial implementation, may need updating)
- **`mtg-cards/src/sets/fdn.rs`** — Card definitions updated:
- Bite Down: `Effect::bite()` + `TargetSpec::fight_targets()`
- Affectionate Indrik: `Effect::fight()` + `TargetSpec::OpponentCreature` (ETB trigger)
- Felling Blow: `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`
- **`mtg-cards/src/sets/ecl.rs`** — Assert Perfection: `Effect::boost_until_eot(1, 0), Effect::fight()` + `TargetSpec::fight_targets()`
- **`mtg-cards/src/sets/tdm.rs`** — Cards updated:
- Knockout Maneuver: `Effect::add_p1p1_counters(1), Effect::fight()` + `TargetSpec::fight_targets()`
- Piercing Exhale: `Effect::fight()` + `TargetSpec::fight_targets()`
- **`docs/work-queue.md`** — Batch 8 marked as done with detailed notes about the limitation
- **`ROADMAP.md`** — Updated to describe Fight/Bite as PARTIAL with known limitations
- **`docs/{fdn,ecl,tdm}-remediation.md`** — Individual cards marked as fixed
- **Java reference files read** (not modified):
- `FightTargetsEffect.java` — Two-target mutual damage
- `DamageWithPowerFromOneToAnotherTargetEffect.java` — Two-target one-way damage
- `BiteDown.java`, `KnockoutManeuver.java`, `PiercingExhale.java`, `AssertPerfection.java`, `FellingBlow.java`, `AffectionateIndrik.java`
4. Errors and Fixes:
- **sed replacing all TargetSpec::None**: When fixing Affectionate Indrik, ran `sed -i 's|TargetSpec::None|TargetSpec::Creature|'` without line restriction, which replaced ALL occurrences in fdn.rs. Fixed by `git checkout mtg-cards/src/sets/fdn.rs` and using line-specific sed (`sed -i '5253s|...|...|'`).
- **Wrong effect classification**: Piercing Exhale, Knockout Maneuver, Assert Perfection, and Felling Blow were classified as Fight but Java shows they are ALL Bite. This was discovered AFTER the initial implementation and cards were already coded with `Effect::fight()` for some of them. **This has NOT been corrected yet.**
- **Compound effect targeting bug**: With `TargetSpec::fight_targets()`, `AddCounters` in Knockout Maneuver and Felling Blow applies +1/+1 counters to ALL targets (both your creature AND opponent's creature). Java uses per-effect target assignment. **This has NOT been fixed yet.**
- **Code not yet compiled/tested**: The latest round of changes (TargetSpec::Pair, select_targets_for_spec, resolve_fight_pair, card TargetSpec updates) have NOT been verified with `cargo check` or `cargo test`.
5. Problem Solving:
- Initial fight/bite implementation completed and tested (252 tests passing)
- User identified Java mismatch, leading to deeper architecture investigation
- Discovered targeting system is a system-wide no-op (not just fight/bite)
- Implemented proper target selection infrastructure (`select_targets_for_spec()`) that works for all TargetSpec variants
- **Remaining unsolved problems**:
1. Four cards (Piercing Exhale, Knockout Maneuver, Assert Perfection, Felling Blow) incorrectly use `Effect::fight()` when they should use `Effect::bite()`
2. Compound effects (counter + bite) put counters on wrong creatures due to shared target list
3. Latest changes not yet compiled or tested
6. All User Messages:
- "Read `docs/work-queue.md` and do the next unchecked batch. For each batch: [9-step process detailed]"
- "Does the description of the mechanic work the same way as the Java implementation? +#### ~~Fight/Bite Mechanic~~ (DONE) `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) auto-select the controller's strongest creature..."
- "Let's fix the gap please"
7. Pending Tasks:
- Fix the 4 cards that should be Bite not Fight (Piercing Exhale, Knockout Maneuver, Assert Perfection, Felling Blow)
- Fix the compound effect targeting bug (AddCounters applies to all targets including opponent's creature)
- Compile and test the latest changes (`cargo check -p mtg-cards && cargo test --lib`)
- Update tests to verify proper two-target selection behavior
- Update docs (work-queue.md, ROADMAP.md, remediation docs) to reflect the corrections
8. Current Work:
We were in the middle of fixing the gap between our Fight/Bite implementation and Java's. The latest round of changes added proper target selection infrastructure (`TargetSpec::Pair`, `select_targets_for_spec()`, `resolve_fight_pair()`) but then we discovered two critical issues by reading the Java source files:
1. **Wrong effect types**: Java's `KnockoutManeuver.java`, `PiercingExhale.java`, `AssertPerfection.java`, `FellingBlow.java` ALL use `DamageWithPowerFromOneToAnotherTargetEffect` (Bite/one-way), NOT `FightTargetsEffect` (Fight/mutual). Only `AffectionateIndrik.java` uses actual Fight (`FightTargetSourceEffect`). So 4 cards currently have `Effect::fight()` when they should have `Effect::bite()`.
2. **Compound effect targeting**: With `TargetSpec::fight_targets()` providing targets[0]=your creature and targets[1]=opponent's creature, the `AddCounters` effect in Knockout Maneuver and Felling Blow incorrectly adds counters to BOTH targets. Java handles this with per-effect target assignment where `AddCountersTargetEffect` only targets the first target.
The latest code changes have NOT been compiled or tested. The code is in a partially-correct state.
9. Optional Next Step:
Fix the two discovered issues before compiling/testing:
1. Change Piercing Exhale, Knockout Maneuver, Assert Perfection, and Felling Blow from `Effect::fight()` to `Effect::bite()` to match Java's `DamageWithPowerFromOneToAnotherTargetEffect`
2. Fix the compound effect targeting for Knockout Maneuver and Felling Blow. The Java pattern shows `AddCountersTargetEffect` targets only the first target (your creature), while `DamageWithPowerFromOneToAnotherTargetEffect` uses target 1's power to damage target 2. One approach: modify `AddCounters` to only apply to `targets[0]` when in a Pair context, or restructure the compound cards differently.
3. Then compile and test: `cargo check -p mtg-cards && cargo test --lib`
This directly continues the user's request to "fix the gap" between our implementation and Java's.
If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: /mnt/dest-btrfs/home/jc/.claude/projects/-mnt-dest-btrfs-home-jc-src-mage/5b037dbb-4f50-48ae-8e73-cb619a17ca9b.jsonl
Please continue the conversation from where we left off without asking the user any further questions. Continue with the last task that you were asked to work on.
## Assistant
## Assistant
Continuing from where we left off. I need to fix two issues discovered before compiling:
1. **Wrong effect types**: 4 cards use `Effect::fight()` but should use `Effect::bite()`
2. **Compound effect targeting**: `AddCounters` applies to all targets including opponent's creature
Let me first read the current state of the affected files.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 50,
"offset": 1
}
```
## Assistant
**Result** (success):
```
1→// Foundations (FDN) set — released 2024-11-15.
2→// 517 unique cards. Basic lands + Tier 1 vanilla/keyword creatures.
3→
4→use crate::cards::basic_lands;
5→use crate::registry::CardRegistry;
6→use mtg_engine::abilities::{Ability, Cost, Effect, StaticEffect, TargetSpec};
7→use mtg_engine::card::CardData;
8→use mtg_engine::constants::*;
9→use mtg_engine::events::EventType;
10→use mtg_engine::mana::{Mana, ManaCost};
11→use mtg_engine::types::{ObjectId, PlayerId};
12→
13→/// Register all implemented FDN cards into the registry.
14→pub fn register(registry: &mut CardRegistry) {
15→ basic_lands::register(registry, "FDN");
16→
17→ registry.register("Aegis Turtle", aegis_turtle, "FDN");
18→ registry.register("Bear Cub", bear_cub, "FDN");
19→ registry.register("Bigfin Bouncer", bigfin_bouncer, "FDN");
20→ registry.register("Bishop's Soldier", bishops_soldier, "FDN");
21→ registry.register("Brazen Scourge", brazen_scourge, "FDN");
22→ registry.register("Burglar Rat", burglar_rat, "FDN");
23→ registry.register("Campus Guide", campus_guide, "FDN");
24→ registry.register("Diregraf Ghoul", diregraf_ghoul, "FDN");
25→ registry.register("Dragon Trainer", dragon_trainer, "FDN");
26→ registry.register("Druid of the Cowl", druid_of_the_cowl, "FDN");
27→ registry.register("Erudite Wizard", erudite_wizard, "FDN");
28→ registry.register("Evolving Wilds", evolving_wilds, "FDN");
29→ registry.register("Felidar Cub", felidar_cub, "FDN");
30→ registry.register("Firebrand Archer", firebrand_archer, "FDN");
31→ registry.register("Grappling Kraken", grappling_kraken, "FDN");
32→ registry.register("Healer's Hawk", healers_hawk, "FDN");
33→ registry.register("Hinterland Sanctifier", hinterland_sanctifier, "FDN");
34→ registry.register("Homunculus Horde", homunculus_horde, "FDN");
35→ registry.register("Infestation Sage", infestation_sage, "FDN");
36→ registry.register("Kitesail Corsair", kitesail_corsair, "FDN");
37→ registry.register("Leonin Skyhunter", leonin_skyhunter, "FDN");
38→ registry.register("Llanowar Elves", llanowar_elves, "FDN");
39→ registry.register("Maalfeld Twins", maalfeld_twins, "FDN");
40→ registry.register("Magnigoth Sentry", magnigoth_sentry, "FDN");
41→ registry.register("Marauding Blight-Priest", marauding_blight_priest, "FDN");
42→ registry.register("Pulse Tracker", pulse_tracker, "FDN");
43→ registry.register("Raging Redcap", raging_redcap, "FDN");
44→ registry.register("Ravenous Giant", ravenous_giant, "FDN");
45→ registry.register("Sanguine Syphoner", sanguine_syphoner, "FDN");
46→ registry.register("Serra Angel", serra_angel, "FDN");
47→ registry.register("Skeleton Archer", skeleton_archer, "FDN");
48→ registry.register("Skyraker Giant", skyraker_giant, "FDN");
49→ registry.register("Storm Fleet Spy", storm_fleet_spy, "FDN");
50→ registry.register("Surrak, the Hunt Caller", surrak_the_hunt_caller, "FDN");
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/abilities.rs",
"limit": 80,
"offset": 1
}
```
## Assistant
**Result** (success):
```
1→// Ability framework — activated, triggered, static, spell, and mana abilities.
2→//
3→// In MTG, abilities are the things cards can do. The framework models:
4→// - **SpellAbility**: The ability a spell has while on the stack (resolve effects)
5→// - **ActivatedAbility**: "Cost: Effect" abilities that can be activated by a player
6→// - **TriggeredAbility**: "When/Whenever/At" abilities that trigger from events
7→// - **StaticAbility**: Abilities that generate continuous effects while in play
8→// - **ManaAbility**: Special activated abilities that produce mana (don't use the stack)
9→//
10→// Ported from mage.abilities.*.
11→
12→use crate::constants::{AbilityType, Zone};
13→use crate::events::{EventType, GameEvent};
14→use crate::mana::Mana;
15→use crate::types::{AbilityId, ObjectId};
16→use serde::{Deserialize, Serialize};
17→
18→// ---------------------------------------------------------------------------
19→// Cost types
20→// ---------------------------------------------------------------------------
21→
22→/// A cost that must be paid to activate an ability or cast a spell.
23→#[derive(Clone, Debug, Serialize, Deserialize)]
24→pub enum Cost {
25→ /// Pay mana (e.g. "{2}{B}").
26→ Mana(Mana),
27→ /// Tap this permanent ("{T}").
28→ TapSelf,
29→ /// Untap this permanent ("{Q}").
30→ UntapSelf,
31→ /// Pay life.
32→ PayLife(u32),
33→ /// Sacrifice this permanent.
34→ SacrificeSelf,
35→ /// Sacrifice another permanent (described by text).
36→ SacrificeOther(String),
37→ /// Discard a card.
38→ Discard(u32),
39→ /// Exile a card from hand.
40→ ExileFromHand(u32),
41→ /// Exile a card from graveyard.
42→ ExileFromGraveyard(u32),
43→ /// Remove counters from this permanent.
44→ RemoveCounters(String, u32),
45→ /// Blight N — put N -1/-1 counters on a creature you control.
46→ /// (ECL set-specific mechanic.)
47→ Blight(u32),
48→ /// Reveal a card of a specific type from hand (used by Behold).
49→ RevealFromHand(String),
50→ /// A custom/complex cost (described by text).
51→ Custom(String),
52→}
53→
54→// ---------------------------------------------------------------------------
55→// Effect types
56→// ---------------------------------------------------------------------------
57→
58→/// What an effect does when it resolves. These are the building blocks
59→/// that card implementations compose to create their abilities.
60→///
61→/// Each variant describes a specific game action. Complex cards can chain
62→/// multiple effects. The game engine interprets these to modify the state.
63→#[derive(Clone, Debug, Serialize, Deserialize)]
64→pub enum Effect {
65→ // -- Damage --
66→ /// Deal damage to target creature or player.
67→ DealDamage { amount: u32 },
68→ /// Deal damage to each creature.
69→ DealDamageAll { amount: u32, filter: String },
70→ /// Deal damage to each opponent.
71→ DealDamageOpponents { amount: u32 },
72→
73→ // -- Life --
74→ /// Gain life.
75→ GainLife { amount: u32 },
76→ /// Lose life (target player).
77→ LoseLife { amount: u32 },
78→ /// Each opponent loses life.
79→ LoseLifeOpponents { amount: u32 },
80→ /// Set life total.
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "Effect::fight\\(\\)|Effect::bite\\(\\)"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/fdn.rs:2305: vec![Effect::bite()],
mtg-cards/src/sets/fdn.rs:5252: vec![Effect::fight()],
mtg-cards/src/sets/fdn.rs:6017: vec![Effect::add_p1p1_counters(1), Effect::bite()],
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl",
"pattern": "fight_targets|TargetSpec::OpponentCreature|TargetSpec::Pair|TargetSpec::CreatureYouControl"
}
```
## Assistant
**Result** (success):
```
docs/work-queue.md:43:- Verify: these cards already have `TargetSpec::OpponentCreature` or similar targeting
mtg-engine/src/game.rs:1660: TargetSpec::Pair { first, second } => {
mtg-engine/src/game.rs:1715: TargetSpec::CreatureYouControl => self
mtg-engine/src/game.rs:1722: TargetSpec::OpponentCreature => self
mtg-engine/src/game.rs:1770: TargetSpec::CreatureYouControl => "target creature you control".into(),
mtg-engine/src/game.rs:1771: TargetSpec::OpponentCreature => "target creature you don't control".into(),
mtg-engine/src/game.rs:1785: TargetSpec::CreatureYouControl => Outcome::Benefit,
mtg-engine/src/game.rs:1786: TargetSpec::OpponentCreature => Outcome::Removal,
mtg-engine/src/game.rs:1803: // Two explicit targets from TargetSpec::Pair selection:
mtg-engine/src/abilities.rs:859: pub fn fight_targets() -> Self {
mtg-engine/src/abilities.rs:860: TargetSpec::Pair {
mtg-engine/src/abilities.rs:861: first: Box::new(TargetSpec::CreatureYouControl),
mtg-engine/src/abilities.rs:862: second: Box::new(TargetSpec::OpponentCreature),
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::fight_targets())],
mtg-cards/src/sets/fdn.rs:2306: TargetSpec::fight_targets()),
mtg-cards/src/sets/fdn.rs:5253: TargetSpec::OpponentCreature),
mtg-cards/src/sets/fdn.rs:6018: TargetSpec::fight_targets()),
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "resolve_fight_pair|select_targets_for_spec|find_fight"
}
```
## Assistant
**Result** (success):
```
682: let targets = self.select_targets_for_spec(&target_spec, player_id);
1459: let (fighter_id, target_id) = Self::resolve_fight_pair(
1482: let (biter_id, target_id) = Self::resolve_fight_pair(
1651: fn select_targets_for_spec(
1662: let first_targets = self.select_targets_for_spec(first, controller);
1664: let second_targets = self.select_targets_for_spec(second, controller);
1797: fn resolve_fight_pair(
```
## Assistant
Good, I can see the current state. Now let me look at the specific card implementations and the fight/bite match arms to understand the compound effect issue.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/tdm.rs",
"limit": 50,
"offset": 1220
}
```
## Assistant
**Result** (success):
```
1220→ // Instant {2}{B}. Destroy target creature. Costs {2} more if targeting Dragon.
1221→ CardData { id, owner, name: "Dragon's Prey".into(), mana_cost: ManaCost::parse("{2}{B}"),
1222→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1223→ abilities: vec![Ability::spell(id, vec![Effect::destroy()], TargetSpec::Creature)],
1224→ ..Default::default() }
1225→}
1226→
1227→fn knockout_maneuver(id: ObjectId, owner: PlayerId) -> CardData {
1228→ // Sorcery {2}{G}. +1/+1 counter on your creature, then it fights opponent's creature.
1229→ CardData { id, owner, name: "Knockout Maneuver".into(), mana_cost: ManaCost::parse("{2}{G}"),
1230→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1231→ abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::fight()], TargetSpec::fight_targets())],
1232→ ..Default::default() }
1233→}
1234→
1235→fn molten_exhale(id: ObjectId, owner: PlayerId) -> CardData {
1236→ // Sorcery {1}{R}. 4 damage to creature/planeswalker. Flash if behold Dragon.
1237→ CardData { id, owner, name: "Molten Exhale".into(), mana_cost: ManaCost::parse("{1}{R}"),
1238→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1239→ abilities: vec![Ability::spell(id, vec![Effect::deal_damage(4)], TargetSpec::Creature)],
1240→ ..Default::default() }
1241→}
1242→
1243→fn narsets_rebuke(id: ObjectId, owner: PlayerId) -> CardData {
1244→ // Instant {4}{R}. 5 damage to creature. Add {U}{R}{W}. Exile if dies.
1245→ CardData { id, owner, name: "Narset's Rebuke".into(), mana_cost: ManaCost::parse("{4}{R}"),
1246→ card_types: vec![CardType::Instant], rarity: Rarity::Uncommon,
1247→ abilities: vec![Ability::spell(id, vec![Effect::deal_damage(5)], TargetSpec::Creature)],
1248→ ..Default::default() }
1249→}
1250→
1251→fn piercing_exhale(id: ObjectId, owner: PlayerId) -> CardData {
1252→ // Instant {1}{G}. Behold Dragon. Your creature fights target. If beheld, surveil 2.
1253→ CardData { id, owner, name: "Piercing Exhale".into(), mana_cost: ManaCost::parse("{1}{G}"),
1254→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1255→ abilities: vec![Ability::spell(id, vec![Effect::fight()], TargetSpec::fight_targets())],
1256→ ..Default::default() }
1257→}
1258→
1259→fn rebellious_strike(id: ObjectId, owner: PlayerId) -> CardData {
1260→ // Instant {1}{W}. Target creature +3/+0. Draw a card.
1261→ CardData { id, owner, name: "Rebellious Strike".into(), mana_cost: ManaCost::parse("{1}{W}"),
1262→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1263→ abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(3, 0), Effect::draw_cards(1)], TargetSpec::Creature)],
1264→ ..Default::default() }
1265→}
1266→
1267→fn salt_road_skirmish(id: ObjectId, owner: PlayerId) -> CardData {
1268→ // Sorcery {3}{B}. Destroy creature. Create two 1/1 Warrior tokens with haste.
1269→ CardData { id, owner, name: "Salt Road Skirmish".into(), mana_cost: ManaCost::parse("{3}{B}"),
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/ecl.rs",
"limit": 20,
"offset": 1790
}
```
## Assistant
**Result** (success):
```
1790→ ..Default::default() }
1791→}
1792→
1793→// ── Tier 2 additional spells ──────────────────────────────────────────────────
1794→
1795→fn assert_perfection(id: ObjectId, owner: PlayerId) -> CardData {
1796→ // Sorcery {1}{G}. Target creature +1/+0, then fights opponent's creature.
1797→ CardData { id, owner, name: "Assert Perfection".into(), mana_cost: ManaCost::parse("{1}{G}"),
1798→ card_types: vec![CardType::Sorcery], rarity: Rarity::Common,
1799→ abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::fight()], TargetSpec::fight_targets())],
1800→ ..Default::default() }
1801→}
1802→
1803→fn blight_rot(id: ObjectId, owner: PlayerId) -> CardData {
1804→ // Instant {2}{B}. Put four -1/-1 counters on target creature.
1805→ CardData { id, owner, name: "Blight Rot".into(), mana_cost: ManaCost::parse("{2}{B}"),
1806→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
1807→ abilities: vec![Ability::spell(id, vec![Effect::add_counters("-1/-1", 4)], TargetSpec::Creature)],
1808→ ..Default::default() }
1809→}
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 2295
}
```
## Assistant
**Result** (success):
```
2295→ ],
2296→ ..Default::default() }
2297→}
2298→
2299→fn bite_down(id: ObjectId, owner: PlayerId) -> CardData {
2300→ // Instant {1}{G}. Your creature deals damage equal to its power to creature/planeswalker.
2301→ CardData { id, owner, name: "Bite Down".into(), mana_cost: ManaCost::parse("{1}{G}"),
2302→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
2303→ abilities: vec![
2304→ Ability::spell(id,
2305→ vec![Effect::bite()],
2306→ TargetSpec::fight_targets()),
2307→ ],
2308→ ..Default::default() }
2309→}
2310→
2311→fn snakeskin_veil(id: ObjectId, owner: PlayerId) -> CardData {
2312→ // Instant {G}. +1/+1 counter on creature you control. It gains hexproof until EOT.
2313→ CardData { id, owner, name: "Snakeskin Veil".into(), mana_cost: ManaCost::parse("{G}"),
2314→ card_types: vec![CardType::Instant], rarity: Rarity::Common,
2315→ abilities: vec![
2316→ Ability::spell(id,
2317→ vec![Effect::add_p1p1_counters(1), Effect::gain_keyword_eot("hexproof")],
2318→ TargetSpec::Creature),
2319→ ],
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 5240
}
```
## Assistant
**Result** (success):
```
5240→}
5241→
5242→fn affectionate_indrik(id: ObjectId, owner: PlayerId) -> CardData {
5243→ CardData { id, owner, name: "Affectionate Indrik".into(), mana_cost: ManaCost::parse("{5}{G}"),
5244→ card_types: vec![CardType::Creature],
5245→ subtypes: vec![SubType::Beast],
5246→ power: Some(4), toughness: Some(4),
5247→ rarity: Rarity::Common,
5248→ abilities: vec![
5249→ Ability::triggered(id,
5250→ "When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control.",
5251→ vec![EventType::EnteredTheBattlefield],
5252→ vec![Effect::fight()],
5253→ TargetSpec::OpponentCreature),
5254→ ],
5255→ ..Default::default() }
5256→}
5257→
5258→fn ajani_caller_of_the_pride(id: ObjectId, owner: PlayerId) -> CardData {
5259→ CardData { id, owner, name: "Ajani, Caller of the Pride".into(), mana_cost: ManaCost::parse("{1}{W}{W}"),
5260→ card_types: vec![CardType::Planeswalker],
5261→ subtypes: vec![SubType::Custom("Ajani".into())],
5262→ supertypes: vec![SuperType::Legendary],
5263→ keywords: KeywordAbilities::FLYING | KeywordAbilities::DOUBLE_STRIKE,
5264→ rarity: Rarity::Uncommon,
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/fdn.rs",
"limit": 25,
"offset": 6005
}
```
## Assistant
**Result** (success):
```
6005→ vec![Effect::Custom("Create two 1/1 blue Faerie creature tokens with flying. When you do, tap target creature an opponent controls.".into())],
6006→ TargetSpec::None),
6007→ ],
6008→ ..Default::default() }
6009→}
6010→
6011→fn felling_blow(id: ObjectId, owner: PlayerId) -> CardData {
6012→ CardData { id, owner, name: "Felling Blow".into(), mana_cost: ManaCost::parse("{2}{G}"),
6013→ card_types: vec![CardType::Sorcery],
6014→ rarity: Rarity::Common,
6015→ abilities: vec![
6016→ Ability::spell(id,
6017→ vec![Effect::add_p1p1_counters(1), Effect::bite()],
6018→ TargetSpec::fight_targets()),
6019→ ],
6020→ ..Default::default() }
6021→}
6022→
6023→fn fiery_annihilation(id: ObjectId, owner: PlayerId) -> CardData {
6024→ CardData { id, owner, name: "Fiery Annihilation".into(), mana_cost: ManaCost::parse("{2}{R}"),
6025→ card_types: vec![CardType::Instant],
6026→ rarity: Rarity::Common,
6027→ abilities: vec![
6028→ Ability::spell(id,
6029→ vec![Effect::Custom("Fiery Annihilation deals 5 damage to target creature. Exile up to one target Equipment attached to that creature. If that creature would die this turn, exile it instead.".into())],
```
## Assistant
Now let me read the fight/bite match arms in game.rs and the AddCounters handling.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 70,
"offset": 1445
}
```
## Assistant
**Result** (success):
```
1445→ for id in matching {
1446→ if let Some(perm) = self.state.battlefield.get_mut(id) {
1447→ perm.granted_keywords |= kw;
1448→ }
1449→ }
1450→ }
1451→ }
1452→ Effect::Fight => {
1453→ // Fight: two creatures deal damage equal to their power to each other.
1454→ //
1455→ // Target resolution (matches Java FightTargetsEffect):
1456→ // - If targets has 2+ entries: targets[0] = your creature, targets[1] = opponent's
1457→ // - If targets has 1 entry + source is creature: source fights targets[0]
1458→ // - Fallback: auto-select strongest on each side
1459→ let (fighter_id, target_id) = Self::resolve_fight_pair(
1460→ &self.state, targets, source, controller,
1461→ );
1462→
1463→ if let (Some(fid), Some(tid)) = (fighter_id, target_id) {
1464→ if fid != tid {
1465→ let fighter_power = self.state.battlefield.get(fid)
1466→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1467→ let target_power = self.state.battlefield.get(tid)
1468→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1469→ if let Some(target_perm) = self.state.battlefield.get_mut(tid) {
1470→ target_perm.apply_damage(fighter_power);
1471→ }
1472→ if let Some(fighter_perm) = self.state.battlefield.get_mut(fid) {
1473→ fighter_perm.apply_damage(target_power);
1474→ }
1475→ }
1476→ }
1477→ }
1478→ Effect::Bite => {
1479→ // Bite: source creature deals damage equal to its power to target
1480→ // creature (one-way; the target does not deal damage back).
1481→ // Same target resolution as Fight.
1482→ let (biter_id, target_id) = Self::resolve_fight_pair(
1483→ &self.state, targets, source, controller,
1484→ );
1485→
1486→ if let (Some(bid), Some(tid)) = (biter_id, target_id) {
1487→ if bid != tid {
1488→ let biter_power = self.state.battlefield.get(bid)
1489→ .map(|p| p.power().max(0) as u32).unwrap_or(0);
1490→ if let Some(target_perm) = self.state.battlefield.get_mut(tid) {
1491→ target_perm.apply_damage(biter_power);
1492→ }
1493→ }
1494→ }
1495→ }
1496→ _ => {
1497→ // Remaining effects not yet implemented (gain control, protection, etc.)
1498→ }
1499→ }
1500→ }
1501→ }
1502→
1503→ /// Move a card to its owner's graveyard (internal version that doesn't need owner lookup).
1504→ fn move_card_to_graveyard_inner(&mut self, card_id: ObjectId, owner: PlayerId) {
1505→ if let Some(player) = self.state.players.get_mut(&owner) {
1506→ player.graveyard.add(card_id);
1507→ self.state.set_zone(card_id, crate::constants::Zone::Graveyard, Some(owner));
1508→ }
1509→ }
1510→
1511→ /// Move a card to its owner's graveyard.
1512→ fn move_card_to_graveyard(&mut self, card_id: ObjectId, owner: PlayerId) {
1513→ if let Some(player) = self.state.players.get_mut(&owner) {
1514→ player.graveyard.add(card_id);
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 60,
"offset": 1790
}
```
## Assistant
**Result** (success):
```
1790→
1791→ /// Resolve the fighter/target pair for Fight/Bite effects.
1792→ ///
1793→ /// Mirrors Java's FightTargetsEffect: uses two explicit targets when
1794→ /// available (targets[0] = your creature, targets[1] = opponent's creature).
1795→ /// Falls back to source creature for ETB triggers, or auto-selects
1796→ /// strongest creatures as last resort.
1797→ fn resolve_fight_pair(
1798→ state: &GameState,
1799→ targets: &[ObjectId],
1800→ source: Option,
1801→ controller: PlayerId,
1802→ ) -> (Option, Option) {
1803→ // Two explicit targets from TargetSpec::Pair selection:
1804→ // targets[0] = creature you control, targets[1] = creature opponent controls
1805→ if targets.len() >= 2 {
1806→ let t0 = state.battlefield.get(targets[0]).map(|_| targets[0]);
1807→ let t1 = state.battlefield.get(targets[1]).map(|_| targets[1]);
1808→ if t0.is_some() && t1.is_some() {
1809→ return (t0, t1);
1810→ }
1811→ }
1812→
1813→ // Single target + source creature (ETB triggers like Affectionate Indrik):
1814→ // source = the creature, targets[0] = opponent's creature
1815→ if targets.len() == 1 {
1816→ if let Some(sid) = source {
1817→ if state.battlefield.get(sid).map_or(false, |p| p.is_creature()) {
1818→ let tid = state.battlefield.get(targets[0]).map(|_| targets[0]);
1819→ return (Some(sid), tid);
1820→ }
1821→ }
1822→ }
1823→
1824→ // Fallback: auto-select strongest creatures on each side
1825→ let fighter = state
1826→ .battlefield
1827→ .iter()
1828→ .filter(|p| p.controller == controller && p.is_creature())
1829→ .max_by_key(|p| p.power())
1830→ .map(|p| p.id());
1831→ let target = state
1832→ .battlefield
1833→ .iter()
1834→ .filter(|p| p.controller != controller && p.is_creature())
1835→ .max_by_key(|p| p.power())
1836→ .map(|p| p.id());
1837→ (fighter, target)
1838→ }
1839→
1840→ /// Check if the game should end and return a result if so.
1841→ fn check_game_end(&self) -> Option {
1842→ if !self.state.should_end() {
1843→ return None;
1844→ }
1845→
1846→ let alive = self.state.active_players();
1847→
1848→ let (winner, reason) = if alive.len() == 1 {
1849→ (Some(alive[0]), GameEndReason::LastPlayerStanding)
```
## Assistant
Now let me look at the AddCounters match arm to understand the compound targeting issue.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-A": 25,
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "Effect::AddCounters"
}
```
## Assistant
**Result** (success):
```
1049: Effect::AddCounters { counter_type, count } => {
1050- let ct = crate::counters::CounterType::from_name(counter_type);
1051- // If no targets, fall back to source (self-targeting counters)
1052- let effective_targets: Vec = if targets.is_empty() {
1053- source.into_iter().collect()
1054- } else {
1055- targets.to_vec()
1056- };
1057- for target_id in effective_targets {
1058- if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1059- perm.add_counters(ct.clone(), *count);
1060- }
1061- }
1062- }
1063- Effect::BoostUntilEndOfTurn { power, toughness: _ } => {
1064- // Simplified: directly modify counters (proper implementation
1065- // would use continuous effects that expire at end of turn)
1066- for &target_id in targets {
1067- if let Some(perm) = self.state.battlefield.get_mut(target_id) {
1068- if *power > 0 {
1069- perm.add_counters(CounterType::P1P1, *power as u32);
1070- }
1071- // Note: This is a simplification; real boost until EOT
1072- // uses continuous effects, not counters
1073- }
1074- }
```
## Assistant
## Assistant
Let me read how `execute_effects` is called to understand the flow.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 30,
"offset": 978
}
```
## Assistant
**Result** (success):
```
978→ }
979→ Effect::Destroy => {
980→ for &target_id in targets {
981→ if let Some(perm) = self.state.battlefield.get(target_id) {
982→ if !perm.has_indestructible() {
983→ if let Some(perm) = self.state.battlefield.remove(target_id) {
984→ self.state.ability_store.remove_source(target_id);
985→ self.move_card_to_graveyard_inner(target_id, perm.owner());
986→ }
987→ }
988→ }
989→ }
990→ }
991→ Effect::Exile => {
992→ for &target_id in targets {
993→ if self.state.battlefield.remove(target_id).is_some() {
994→ self.state.ability_store.remove_source(target_id);
995→ self.state.exile.exile(target_id);
996→ self.state.set_zone(target_id, crate::constants::Zone::Exile, None);
997→ }
998→ }
999→ }
1000→ Effect::Bounce => {
1001→ for &target_id in targets {
1002→ if let Some(perm) = self.state.battlefield.remove(target_id) {
1003→ self.state.ability_store.remove_source(target_id);
1004→ let owner = perm.owner();
1005→ if let Some(player) = self.state.players.get_mut(&owner) {
1006→ player.hand.add(target_id);
1007→ }
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 30,
"offset": 670
}
```
## Assistant
**Result** (success):
```
670→ player.hand.add(card_id);
671→ return;
672→ }
673→ }
674→
675→ // Select targets based on the spell's TargetSpec
676→ let target_spec = card_data
677→ .abilities
678→ .iter()
679→ .find(|a| a.ability_type == AbilityType::Spell)
680→ .map(|a| a.targets.clone())
681→ .unwrap_or(crate::abilities::TargetSpec::None);
682→ let targets = self.select_targets_for_spec(&target_spec, player_id);
683→
684→ // Put on the stack
685→ let stack_item = crate::zones::StackItem {
686→ id: card_id,
687→ kind: crate::zones::StackItemKind::Spell { card: card_data.clone() },
688→ controller: player_id,
689→ targets,
690→ countered: false,
691→ };
692→ self.state.stack.push(stack_item);
693→ self.state.set_zone(card_id, crate::constants::Zone::Stack, None);
694→ }
695→
696→ /// Resolve the top item on the stack.
697→ fn resolve_top_of_stack(&mut self) {
698→ let item = match self.state.stack.pop() {
699→ Some(item) => item,
```
## Assistant
Now let me see how `execute_effects` is called with targets.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-A": 2,
"-B": 2,
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"pattern": "execute_effects\\("
}
```
## Assistant
**Result** (success):
```
748- .collect();
749- let targets = item.targets.clone();
750: self.execute_effects(&effects, item.controller, &targets, Some(item.id));
751- self.move_card_to_graveyard(item.id, item.controller);
752- }
--
758- if let Some(ability) = ability_data {
759- let targets = item.targets.clone();
760: self.execute_effects(&ability.effects, item.controller, &targets, Some(source));
761- }
762- }
--
956-
957- /// Execute a list of effects for a controller with given targets.
958: pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
959- for effect in effects {
960- match effect {
--
2395-
2396- // Execute a draw 2 effect
2397: game.execute_effects(&[Effect::DrawCards { count: 2 }], p1, &[], None);
2398-
2399- let final_hand = game.state.players.get(&p1).unwrap().hand.len();
--
2425- );
2426-
2427: game.execute_effects(&[Effect::GainLife { amount: 5 }], p1, &[], None);
2428- assert_eq!(game.state.players.get(&p1).unwrap().life, 25);
2429- }
--
2450- );
2451-
2452: game.execute_effects(&[Effect::lose_life_opponents(3)], p1, &[], None);
2453- // Controller's life should be unchanged
2454- assert_eq!(game.state.players.get(&p1).unwrap().life, 20);
--
2488-
2489- // Exile it
2490: game.execute_effects(&[Effect::Exile], p1, &[bear_id], None);
2491-
2492- assert!(!game.state.battlefield.contains(bear_id));
--
2526-
2527- // Bounce it
2528: game.execute_effects(&[Effect::Bounce], p1, &[bear_id], None);
2529-
2530- assert!(!game.state.battlefield.contains(bear_id));
--
2610-
2611- // Execute AddCounters with no targets but with source — should add to self
2612: game.execute_effects(
2613- &[Effect::add_counters("-1/-1", 2)],
2614- p1,
--
2621-
2622- // Execute RemoveCounters with no targets but with source — should remove from self
2623: game.execute_effects(
2624- &[Effect::RemoveCounters { counter_type: "-1/-1".into(), count: 1 }],
2625- p1,
--
2694-
2695- // Each opponent discards 1
2696: game.execute_effects(&[Effect::discard_opponents(1)], p1, &[], None);
2697-
2698- // Controller's hand unchanged
--
2736-
2737- // Boost all creatures P1 controls +1/+1
2738: game.execute_effects(
2739- &[Effect::boost_all_eot("creatures you control", 1, 1)],
2740- p1, &[], None,
--
2747-
2748- // Grant trample to all creatures P1 controls
2749: game.execute_effects(
2750- &[Effect::grant_keyword_all_eot("creatures you control", "trample")],
2751- p1, &[], None,
--
2789-
2790- // Fight: mutual damage — fighter (4 power) vs target (3 power)
2791: game.execute_effects(
2792- &[Effect::fight()],
2793- p1,
--
2808-
2809- // Bite: one-way damage — fighter deals 4 to target, target deals nothing back
2810: game.execute_effects(
2811- &[Effect::bite()],
2812- p1,
--
2856-
2857- // Fight with no source, no targets — auto-selects strongest on each side
2858: game.execute_effects(&[Effect::fight()], p1, &[], None);
2859-
2860- // P1's 5/5 should fight P2's 3/3
```
## Assistant
## Assistant
Now I have a clear picture. Three fixes needed:
1. **Fix effect types**: Knockout Maneuver, Piercing Exhale, Assert Perfection → `Effect::bite()`
2. **Fix compound targeting**: In `execute_effects`, pre-fight/bite effects should only target `targets[0]` (your creature)
3. **Compile and test**
Let me read the `execute_effects` signature area more carefully, then apply all fixes.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 10,
"offset": 956
}
```
## Assistant
**Result** (success):
```
956→
957→ /// Execute a list of effects for a controller with given targets.
958→ pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {
959→ for effect in effects {
960→ match effect {
961→ Effect::DealDamage { amount } => {
962→ // Deal damage to target permanents.
963→ // Player targeting is handled separately via SelectedTargets.
964→ for &target_id in targets {
965→ if let Some(perm) = self.state.battlefield.get_mut(target_id) {
```
## Assistant
Now I'll apply all three card fixes and the engine fix. Let me do the card fixes in parallel.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i '1231s/Effect::fight()/Effect::bite()/' mtg-cards/src/sets/tdm.rs",
"description": "Fix Knockout Maneuver: fight→bite"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i '1255s/Effect::fight()/Effect::bite()/' mtg-cards/src/sets/tdm.rs",
"description": "Fix Piercing Exhale: fight→bite"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i '1799s/Effect::fight()/Effect::bite()/' mtg-cards/src/sets/ecl.rs",
"description": "Fix Assert Perfection: fight→bite"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Good. Now for the compound targeting fix in `execute_effects`. I need to rename the parameter and add per-effect target slicing.
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " /// Execute a list of effects for a controller with given targets.\n pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, all_targets: &[ObjectId], source: Option) {\n // For compound fight/bite spells (e.g. [AddCounters, Bite]), pre-fight/bite\n // effects should only apply to the first target (your creature), matching\n // Java's per-effect target assignment where AddCountersTargetEffect targets\n // target 0 while DamageWithPowerFromOneToAnotherTargetEffect uses both.\n let has_fight_or_bite = effects.iter().any(|e| matches!(e, Effect::Fight | Effect::Bite));\n\n for effect in effects {\n let targets: &[ObjectId] = if has_fight_or_bite\n && !matches!(effect, Effect::Fight | Effect::Bite)\n && all_targets.len() >= 2\n {\n &all_targets[..1]\n } else {\n all_targets\n };\n match effect {",
"old_string": " /// Execute a list of effects for a controller with given targets.\n pub fn execute_effects(&mut self, effects: &[Effect], controller: PlayerId, targets: &[ObjectId], source: Option) {\n for effect in effects {\n match effect {",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
Now let me compile to check for errors.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo check 2>&1",
"description": "Check compilation of all crates",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Checking mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Checking mtg-cards v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards)
Checking mtg-ai v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai)
warning: fields `action` and `depth` are never read
--> mtg-ai/src/minimax_player.rs:62:5
|
60 | struct SearchNode {
| ---------- fields in this struct
61 | /// The action that led to this node (None for root).
62 | action: Option,
| ^^^^^^
...
70 | depth: u32,
| ^^^^^
|
= note: `SearchNode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
warning: associated functions `new_root` and `new_child` are never used
--> mtg-ai/src/minimax_player.rs:74:8
|
73 | impl SearchNode {
| --------------- associated functions in this implementation
74 | fn new_root(is_maximizing: bool) -> Self {
| ^^^^^^^^
...
84 | fn new_child(action: PlayerAction, depth: u32, is_maximizing: bool) -> Self {
| ^^^^^^^^^
warning: `mtg-ai` (lib) generated 2 warnings
Checking mtg-tests v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-tests)
Checking mtg-python v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-python)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.91s
```
## Assistant
Clean compilation. Now let's run the tests.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test --lib 2>&1",
"description": "Run all library tests",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
Compiling mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Compiling mtg-cards v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards)
Compiling mtg-ai v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai)
warning: fields `action` and `depth` are never read
--> mtg-ai/src/minimax_player.rs:62:5
|
60 | struct SearchNode {
| ---------- fields in this struct
61 | /// The action that led to this node (None for root).
62 | action: Option,
| ^^^^^^
...
70 | depth: u32,
| ^^^^^
|
= note: `SearchNode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
warning: associated functions `new_root` and `new_child` are never used
--> mtg-ai/src/minimax_player.rs:74:8
|
73 | impl SearchNode {
| --------------- associated functions in this implementation
74 | fn new_root(is_maximizing: bool) -> Self {
| ^^^^^^^^
...
84 | fn new_child(action: PlayerAction, depth: u32, is_maximizing: bool) -> Self {
| ^^^^^^^^^
warning: `mtg-ai` (lib) generated 2 warnings
Compiling mtg-python v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-python)
Compiling mtg-tests v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-tests)
warning: `mtg-ai` (lib test) generated 1 warning (1 duplicate)
Finished `test` profile [unoptimized + debuginfo] target(s) in 4.50s
Running unittests src/lib.rs (target/debug/deps/mtg_ai-a3cefc6981511e97)
running 52 tests
test action_space::tests::action_mask_pass_only ... ok
test action_space::tests::action_mask_with_castable_spell ... ok
test action_space::tests::phase1_activate_ability_roundtrip ... ok
test action_space::tests::phase1_out_of_range_returns_none ... ok
test action_space::tests::phase1_cast_spell_roundtrip ... ok
test action_space::tests::phase1_play_land_roundtrip ... ok
test action_space::tests::phase1_all_indices_are_unique ... ok
test action_space::tests::phase1_pass_roundtrip ... ok
test action_space::tests::phase2_roundtrip ... ok
test action_space::tests::reward_intermediate_negative_when_losing_advantage ... ok
test action_space::tests::reward_intermediate_positive_when_gaining_advantage ... ok
test action_space::tests::reward_loss_is_negative ... ok
test action_space::tests::reward_win_is_positive ... ok
test evaluator::tests::creature_permanent_scores_positively ... ok
test evaluator::tests::equal_board_state_scores_zero ... ok
test evaluator::tests::flying_creature_scores_higher ... ok
test evaluator::tests::keyword_scores_are_reasonable ... ok
test evaluator::tests::life_score_above_20 ... ok
test evaluator::tests::life_score_lookup_table ... ok
test evaluator::tests::loss_state_gives_min_score ... ok
test evaluator::tests::more_life_is_better ... ok
test evaluator::tests::win_state_gives_max_score ... ok
test gym::tests::env_action_mask_has_correct_size ... ok
test gym::tests::env_reset_returns_correct_size_observation ... ok
test gym::tests::env_space_sizes ... ok
test gym::tests::env_step_returns_valid_result ... ok
test heuristic_player::tests::heuristic_attacks_with_all ... ok
test heuristic_player::tests::heuristic_choose_use_says_yes_except_ai_dont_use ... ok
test heuristic_player::tests::heuristic_damage_assignment_correct_total ... ok
test heuristic_player::tests::heuristic_mulligan_keeps_small_hands ... ok
test gym::tests::env_truncates_at_max_turns ... ok
test heuristic_player::tests::heuristic_mulligan_mulligans_7_card_hand ... ok
test heuristic_player::tests::heuristic_passes_when_only_option ... ok
test heuristic_player::tests::heuristic_pile_prefers_larger_for_good ... ok
test heuristic_player::tests::heuristic_prefers_land_over_pass ... ok
test heuristic_player::tests::heuristic_prefers_land_over_spell ... ok
test heuristic_player::tests::heuristic_prefers_spell_over_pass ... ok
test minimax_player::tests::minimax_ab_alpha_beta_pruning ... ok
test minimax_player::tests::minimax_free_spell_preferred_over_regular ... ok
test minimax_player::tests::minimax_prefers_land_over_spell ... ok
test minimax_player::tests::minimax_search_stats_tracked ... ok
test minimax_player::tests::minimax_passes_when_only_option ... ok
test observation::tests::observation_size_constant_matches ... ok
test minimax_player::tests::minimax_prefers_spell_over_pass ... ok
test observation::tests::observation_has_correct_size ... ok
test observation::tests::permanents_are_padded ... ok
test random_player::tests::random_player_damage_assignment_sums_correctly ... ok
test observation::tests::phase_one_hot_encoding ... ok
test observation::tests::life_normalized_correctly ... ok
test random_player::tests::random_player_passes_when_only_option ... ok
test random_player::tests::random_player_choose_use_returns_bool ... ok
test random_player::tests::random_player_chooses_from_legal_actions ... ok
test result: ok. 52 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
Running unittests src/lib.rs (target/debug/deps/mtg_cards-c237fd9c64d2d797)
running 18 tests
test keywords::behold::tests::behold_elf_cost ... ok
test keywords::behold::tests::behold_rules_text_format ... ok
test keywords::behold::tests::behold_goblin_cost ... ok
test keywords::blight::tests::blight_1_cost ... ok
test keywords::blight::tests::blight_2_cost ... ok
test keywords::blight::tests::blight_rules_text_plural ... ok
test keywords::blight::tests::blight_rules_text_singular ... ok
test keywords::mobilize::tests::mobilize_1_creates_triggered_ability ... ok
test keywords::mobilize::tests::mobilize_2_creates_two_tokens ... ok
test keywords::mobilize::tests::mobilize_3 ... ok
test registry::tests::ecl_specific_cards ... ok
test registry::tests::ecl_tier2_spells ... ok
test registry::tests::fdn_tier2_cards ... ok
test registry::tests::fdn_tier3_cards ... ok
test registry::tests::registry_create_and_lookup ... ok
test registry::tests::registry_card_counts ... ok
test registry::tests::registry_set_query ... ok
test registry::tests::tdm_tier2_spells ... ok
test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_engine-10c8e693567e8570)
running 163 tests
test abilities::tests::activated_ability ... ok
test abilities::tests::ability_store ... ok
test abilities::tests::active_zones ... ok
test abilities::tests::combat_damage_triggered ... ok
test abilities::tests::attacks_triggered ... ok
test abilities::tests::compose_realistic_card_lightning_bolt ... ok
test abilities::tests::compose_realistic_card_llanowar_elves ... ok
test abilities::tests::compose_realistic_card_mulldrifter ... ok
test abilities::tests::compose_realistic_lord ... ok
test abilities::tests::cost_builders ... ok
test abilities::tests::dies_triggered ... ok
test abilities::tests::effect_builders ... ok
test abilities::tests::end_step_triggered ... ok
test abilities::tests::etb_triggered ... ok
test abilities::tests::mana_ability ... ok
test abilities::tests::optional_trigger ... ok
test abilities::tests::static_ability_boost ... ok
test abilities::tests::spell_ability ... ok
test abilities::tests::static_effect_builders ... ok
test abilities::tests::triggered_ability ... ok
test abilities::tests::upkeep_triggered ... ok
test card::tests::create_basic_creature ... ok
test card::tests::create_basic_land ... ok
test combat::tests::blocked_damage ... ok
test combat::tests::blocker_damage_timing ... ok
test combat::tests::blocking ... ok
test combat::tests::combat_clear ... ok
test combat::tests::combat_state_basics ... ok
test combat::tests::deathtouch_minimizes_damage ... ok
test combat::tests::double_strike_both_steps ... ok
test combat::tests::first_strike_timing ... ok
test combat::tests::flying_blocks ... ok
test combat::tests::menace_requires_two_blockers ... ok
test combat::tests::trample_overflow ... ok
test combat::tests::unblocked_damage ... ok
test counters::tests::add_and_remove_counters ... ok
test counters::tests::counter_type_from_name ... ok
test counters::tests::pt_modification ... ok
test effects::tests::boost_effect ... ok
test effects::tests::continuous_effects_manager ... ok
test effects::tests::remove_from_source ... ok
test effects::tests::keyword_grant_effect ... ok
test events::tests::applied_effects_tracking ... ok
test effects::tests::replacement_effects ... ok
test events::tests::damage_player_convenience ... ok
test events::tests::combat_events ... ok
test events::tests::event_builder ... ok
test effects::tests::timestamp_ordering ... ok
test events::tests::event_log ... ok
test events::tests::zone_change_event ... ok
test filters::tests::filter_color ... ok
test events::tests::spell_cast_event ... ok
test filters::tests::filter_controller ... ok
test events::tests::prevention ... ok
test filters::tests::filter_mana_value ... ok
test filters::tests::filter_card_data ... ok
test filters::tests::filter_not_combinator ... ok
test filters::tests::filter_or_combinator ... ok
test filters::tests::filter_tapped_untapped ... ok
test filters::tests::filter_keyword ... ok
test filters::tests::filter_nonland_permanent ... ok
test filters::tests::filter_creature ... ok
test filters::tests::filter_power_comparison ... ok
test game::tests::activated_ability_goes_on_stack ... ok
test game::tests::bounce_effect ... ok
test game::tests::counter_annihilation_applied ... ok
test game::tests::draw_cards_effect ... ok
test game::tests::add_counters_self_when_no_targets ... ok
test game::tests::exile_effect ... ok
test game::tests::draw_cards_from_empty_library_causes_loss ... ok
test game::tests::discard_opponents_effect ... ok
test game::tests::boost_all_and_grant_keyword_all_until_eot ... ok
test game::tests::fight_and_bite_effects ... ok
test game::tests::gain_life_effect ... ok
test game::tests::fizzle_when_target_removed ... ok
test game::tests::game_creation ... ok
test game::tests::legend_rule_applied ... ok
test mana::tests::can_pay_colored ... ok
test game::tests::mana_ability_and_spell_cast ... ok
test mana::tests::can_pay_generic ... ok
test mana::tests::cannot_pay_insufficient ... ok
test game::tests::pay_costs_tap_and_sacrifice ... ok
test game::tests::spell_effects_execute_on_resolve ... ok
test mana_pool::tests::add_and_spend_colored ... ok
test mana_pool::tests::any_mana_pays_colored ... ok
test mana_pool::tests::color_array ... ok
test mana::tests::cost_colors ... ok
test game::tests::fight_auto_selects_creatures ... ok
test mana_pool::tests::try_pay_atomic ... ok
test permanent::tests::counters_modify_pt ... ok
test permanent::tests::haste_ignores_summoning_sickness ... ok
test mana::tests::mana_display ... ok
test permanent::tests::tap_untap ... ok
test player::tests::discard_check ... ok
test player::tests::find_card_in_zones ... ok
test mana::tests::parse_simple_cost ... ok
test player::tests::game_over_states ... ok
test player::tests::land_plays ... ok
test player::tests::life_changes ... ok
test player::tests::poison_counters ... ok
test player::tests::starting_values ... ok
test state::tests::can_cast_sorcery ... ok
test game::tests::lose_life_opponents_effect ... ok
test mana_pool::tests::spend_generic_prefers_colorless ... ok
test state::tests::initial_state ... ok
test state::tests::sba_counter_annihilation ... ok
test state::tests::next_player_wraps ... ok
test state::tests::sba_indestructible_survives_damage ... ok
test state::tests::sba_legend_rule ... ok
test permanent::tests::creature_basics ... ok
test state::tests::sba_legend_rule_different_controllers ... ok
test state::tests::sba_life_loss ... ok
test state::tests::sba_no_counter_annihilation_when_only_one_type ... ok
test state::tests::sba_lethal_damage ... ok
test permanent::tests::defender_cannot_attack ... ok
test mana_pool::tests::clear_empties_pool ... ok
test state::tests::sba_planeswalker_zero_loyalty ... ok
test mana::tests::mana_arithmetic ... ok
test permanent::tests::keyword_grants ... ok
test state::tests::should_end_one_player_left ... ok
test permanent::tests::damage_and_lethal ... ok
test state::tests::sba_poison ... ok
test state::tests::zone_tracking ... ok
test state::tests::sba_zero_toughness ... ok
test game::tests::legal_actions_include_pass ... ok
test targets::tests::empty_targets ... ok
test targets::tests::selected_targets_objects ... ok
test targets::tests::divided_amounts ... ok
test targets::tests::selected_targets_players ... ok
test targets::tests::target_definition_basics ... ok
test targets::tests::mark_illegal ... ok
test turn::tests::extra_turns ... ok
test targets::tests::mark_player_illegal ... ok
test turn::tests::extra_turns_lifo ... ok
test turn::tests::first_strike_step ... ok
test turn::tests::priority_rules ... ok
test targets::tests::target_definition_up_to ... ok
test turn::tests::turn_rotation ... ok
test turn::tests::priority_tracking ... ok
test watchers::tests::custom_watcher_card_scope ... ok
test turn::tests::step_to_phase_mapping ... ok
test turn::tests::end_turn_skips_to_cleanup ... ok
test turn::tests::turn_step_sequence ... ok
test watchers::tests::custom_watcher_game_scope ... ok
test watchers::tests::custom_watcher_player_scope ... ok
test watchers::tests::custom_watcher_reset ... ok
test watchers::tests::reset_clears_stats ... ok
test watchers::tests::track_attackers ... ok
test watchers::tests::track_cards_drawn ... ok
test watchers::tests::track_creatures_died ... ok
test watchers::tests::track_enters_battlefield ... ok
test watchers::tests::track_life_gained ... ok
test watchers::tests::track_spells_cast ... ok
test zones::tests::battlefield_add_remove ... ok
test zones::tests::battlefield_controlled_by ... ok
test zones::tests::exile_zones ... ok
test zones::tests::graveyard_ordering ... ok
test zones::tests::hand_add_remove ... ok
test zones::tests::library_draw ... ok
test zones::tests::library_peek ... ok
test zones::tests::library_put_on_top_and_bottom ... ok
test zones::tests::stack_lifo ... ok
test game::tests::game_runs_to_completion ... ok
test result: ok. 163 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
Running unittests src/lib.rs (target/debug/deps/mtg_python-d2f2ac684d6d76ac)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_tests-fac26c7f0fd5aee5)
running 19 tests
test concurrency::tests::game_state_clone_is_independent ... ok
test framework::tests::framework_create_token_with_keyword ... ok
test framework::tests::framework_bolt_kills_bear ... ok
test concurrency::tests::gymnasium_env_runs_end_to_end ... ok
test framework::tests::framework_create_token_effect ... ok
test framework::tests::framework_direct_effect_execution ... ok
test framework::tests::framework_custom_starting_life ... ok
test framework::tests::framework_draw_cards_effect ... ok
test framework::tests::framework_gain_life_effect ... ok
test framework::tests::framework_exile_and_assert ... ok
test framework::tests::framework_life_totals ... ok
test framework::tests::framework_multiple_permanents ... ok
test framework::tests::framework_setup_battlefield ... ok
test framework::tests::framework_setup_graveyard ... ok
test framework::tests::framework_setup_hand ... ok
test concurrency::tests::parallel_games_produce_varied_results ... ok
test concurrency::tests::parallel_games_complete_without_panic ... ok
test concurrency::tests::throughput_baseline ... ok
test concurrency::tests::parallel_gymnasium_envs ... ok
test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s
```
## Assistant
All 252 tests pass. Now let me also write a test that specifically validates the compound targeting behavior — that AddCounters only applies to your creature, not the opponent's creature, when combined with Bite.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 100,
"offset": 2780
}
```
## Assistant
**Result** (success):
```
2780→ players: vec![
2781→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
2782→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
2783→ ],
2784→ starting_life: 20,
2785→ };
2786→
2787→ let mut game = Game::new_two_player(
2788→ config,
2789→ vec![
2790→ (p1, Box::new(AlwaysPassPlayer)),
2791→ (p2, Box::new(AlwaysPassPlayer)),
2792→ ],
2793→ );
2794→
2795→ // Set up: P1 has a 4/4, P2 has a 3/5
2796→ let fighter = make_creature("Fighter", p1, 4, 4);
2797→ let fighter_id = fighter.id;
2798→ let target = make_creature("Target", p2, 3, 5);
2799→ let target_id = target.id;
2800→
2801→ game.state.battlefield.add(Permanent::new(fighter, p1));
2802→ game.state.battlefield.add(Permanent::new(target, p2));
2803→
2804→ // Fight: mutual damage — fighter (4 power) vs target (3 power)
2805→ game.execute_effects(
2806→ &[Effect::fight()],
2807→ p1,
2808→ &[target_id],
2809→ Some(fighter_id),
2810→ );
2811→
2812→ // Fighter took 3 damage (from target's 3 power): 4 toughness - 3 = 1 remaining
2813→ let f = game.state.battlefield.get(fighter_id).unwrap();
2814→ assert_eq!(f.remaining_toughness(), 1);
2815→ // Target took 4 damage (from fighter's 4 power): 5 toughness - 4 = 1 remaining
2816→ let t = game.state.battlefield.get(target_id).unwrap();
2817→ assert_eq!(t.remaining_toughness(), 1);
2818→
2819→ // Clear damage for next test
2820→ game.state.battlefield.get_mut(fighter_id).unwrap().clear_damage();
2821→ game.state.battlefield.get_mut(target_id).unwrap().clear_damage();
2822→
2823→ // Bite: one-way damage — fighter deals 4 to target, target deals nothing back
2824→ game.execute_effects(
2825→ &[Effect::bite()],
2826→ p1,
2827→ &[target_id],
2828→ Some(fighter_id),
2829→ );
2830→
2831→ // Fighter should have no damage
2832→ let f = game.state.battlefield.get(fighter_id).unwrap();
2833→ assert_eq!(f.remaining_toughness(), 4);
2834→ // Target took 4 damage: 5 toughness - 4 = 1 remaining
2835→ let t = game.state.battlefield.get(target_id).unwrap();
2836→ assert_eq!(t.remaining_toughness(), 1);
2837→ }
2838→
2839→ #[test]
2840→ fn fight_auto_selects_creatures() {
2841→ let p1 = PlayerId::new();
2842→ let p2 = PlayerId::new();
2843→
2844→ let config = GameConfig {
2845→ players: vec![
2846→ PlayerConfig { name: "Alice".to_string(), deck: make_deck(p1) },
2847→ PlayerConfig { name: "Bob".to_string(), deck: make_deck(p2) },
2848→ ],
2849→ starting_life: 20,
2850→ };
2851→
2852→ let mut game = Game::new_two_player(
2853→ config,
2854→ vec![
2855→ (p1, Box::new(AlwaysPassPlayer)),
2856→ (p2, Box::new(AlwaysPassPlayer)),
2857→ ],
2858→ );
2859→
2860→ // P1 has a 2/2 and a 5/5; P2 has a 3/3
2861→ let small = make_creature("Small Bear", p1, 2, 2);
2862→ let big = make_creature("Big Bear", p1, 5, 5);
2863→ let big_id = big.id;
2864→ let opp = make_creature("Opponent Bear", p2, 3, 3);
2865→ let opp_id = opp.id;
2866→
2867→ game.state.battlefield.add(Permanent::new(small, p1));
2868→ game.state.battlefield.add(Permanent::new(big, p1));
2869→ game.state.battlefield.add(Permanent::new(opp, p2));
2870→
2871→ // Fight with no source, no targets — auto-selects strongest on each side
2872→ game.execute_effects(&[Effect::fight()], p1, &[], None);
2873→
2874→ // P1's 5/5 should fight P2's 3/3
2875→ // Big bear: 5 toughness - 3 damage = 2 remaining
2876→ let b = game.state.battlefield.get(big_id).unwrap();
2877→ assert_eq!(b.remaining_toughness(), 2);
2878→ // Opponent bear: 3 toughness - 5 damage = lethal
2879→ let o = game.state.battlefield.get(opp_id).unwrap();
```
## Assistant
Now let me add a test for compound bite targeting — this validates that counters go on your creature only.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"limit": 20,
"offset": 2879
}
```
## Assistant
**Result** (success):
```
2879→ let o = game.state.battlefield.get(opp_id).unwrap();
2880→ assert!(o.has_lethal_damage());
2881→ }
2882→}
2883→
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs",
"new_string": " let o = game.state.battlefield.get(opp_id).unwrap();\n assert!(o.has_lethal_damage());\n }\n\n #[test]\n fn compound_bite_counters_only_on_your_creature() {\n // Matches Java's Knockout Maneuver / Felling Blow pattern:\n // AddCountersTargetEffect targets only target 0 (your creature),\n // DamageWithPowerFromOneToAnotherTargetEffect uses both targets.\n let p1 = PlayerId::new();\n let p2 = PlayerId::new();\n\n let config = GameConfig {\n players: vec![\n PlayerConfig { name: \"Alice\".to_string(), deck: make_deck(p1) },\n PlayerConfig { name: \"Bob\".to_string(), deck: make_deck(p2) },\n ],\n starting_life: 20,\n };\n\n let mut game = Game::new_two_player(\n config,\n vec![\n (p1, Box::new(AlwaysPassPlayer)),\n (p2, Box::new(AlwaysPassPlayer)),\n ],\n );\n\n // P1 has a 3/3, P2 has a 4/4\n let my_creature = make_creature(\"My Creature\", p1, 3, 3);\n let my_id = my_creature.id;\n let opp_creature = make_creature(\"Opp Creature\", p2, 4, 4);\n let opp_id = opp_creature.id;\n\n game.state.battlefield.add(Permanent::new(my_creature, p1));\n game.state.battlefield.add(Permanent::new(opp_creature, p2));\n\n // Compound effect: +1/+1 counter then bite (like Knockout Maneuver)\n // targets[0] = my creature, targets[1] = opponent creature\n game.execute_effects(\n &[Effect::add_p1p1_counters(1), Effect::bite()],\n p1,\n &[my_id, opp_id],\n None,\n );\n\n // My creature should have the +1/+1 counter (3+1=4 power, 3+1=4 toughness)\n let my = game.state.battlefield.get(my_id).unwrap();\n assert_eq!(my.power(), 4, \"My creature should have +1/+1 counter (4 power)\");\n assert_eq!(my.toughness(), 4, \"My creature should have +1/+1 counter (4 toughness)\");\n\n // Opponent's creature should NOT have any counters\n let opp = game.state.battlefield.get(opp_id).unwrap();\n assert_eq!(opp.power(), 4, \"Opponent creature should not have counters\");\n\n // Bite: my creature (now 4 power) deals 4 damage to opponent creature (4 toughness)\n assert_eq!(opp.remaining_toughness(), 0, \"Opponent took 4 damage from bite\");\n // My creature should have no damage (bite is one-way)\n assert_eq!(my.remaining_toughness(), 4, \"My creature took no damage from bite\");\n }\n}",
"old_string": " let o = game.state.battlefield.get(opp_id).unwrap();\n assert!(o.has_lethal_damage());\n }\n}",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine/src/game.rs has been updated successfully.
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test --lib compound_bite 2>&1",
"description": "Run compound bite targeting test",
"timeout": 60000
}
```
## Assistant
**Result** (success):
```
Compiling mtg-engine v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-engine)
Compiling mtg-cards v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards)
Compiling mtg-ai v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-ai)
warning: fields `action` and `depth` are never read
--> mtg-ai/src/minimax_player.rs:62:5
|
60 | struct SearchNode {
| ---------- fields in this struct
61 | /// The action that led to this node (None for root).
62 | action: Option,
| ^^^^^^
...
70 | depth: u32,
| ^^^^^
|
= note: `SearchNode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
warning: associated functions `new_root` and `new_child` are never used
--> mtg-ai/src/minimax_player.rs:74:8
|
73 | impl SearchNode {
| --------------- associated functions in this implementation
74 | fn new_root(is_maximizing: bool) -> Self {
| ^^^^^^^^
...
84 | fn new_child(action: PlayerAction, depth: u32, is_maximizing: bool) -> Self {
| ^^^^^^^^^
warning: `mtg-ai` (lib) generated 2 warnings
Compiling mtg-python v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-python)
Compiling mtg-tests v0.1.0 (/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-tests)
warning: `mtg-ai` (lib test) generated 1 warning (1 duplicate)
Finished `test` profile [unoptimized + debuginfo] target(s) in 1.78s
Running unittests src/lib.rs (target/debug/deps/mtg_ai-a3cefc6981511e97)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 52 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_cards-c237fd9c64d2d797)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 18 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_engine-10c8e693567e8570)
running 1 test
test game::tests::compound_bite_counters_only_on_your_creature ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 163 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_python-d2f2ac684d6d76ac)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/lib.rs (target/debug/deps/mtg_tests-fac26c7f0fd5aee5)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 19 filtered out; finished in 0.00s
```
## Assistant
The compound targeting test passes. Let me run the full test suite to make sure nothing is broken.
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test --lib 2>&1 | tail -20",
"description": "Run all tests, show summary",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
test framework::tests::framework_create_token_effect ... ok
test framework::tests::framework_create_token_with_keyword ... ok
test framework::tests::framework_custom_starting_life ... ok
test concurrency::tests::gymnasium_env_runs_end_to_end ... ok
test framework::tests::framework_direct_effect_execution ... ok
test framework::tests::framework_draw_cards_effect ... ok
test framework::tests::framework_exile_and_assert ... ok
test framework::tests::framework_gain_life_effect ... ok
test framework::tests::framework_life_totals ... ok
test framework::tests::framework_multiple_permanents ... ok
test framework::tests::framework_setup_battlefield ... ok
test framework::tests::framework_setup_hand ... ok
test framework::tests::framework_setup_graveyard ... ok
test concurrency::tests::parallel_games_produce_varied_results ... ok
test concurrency::tests::parallel_gymnasium_envs ... ok
test concurrency::tests::parallel_games_complete_without_panic ... ok
test concurrency::tests::throughput_baseline ... ok
test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.32s
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "cargo test --lib 2>&1 | grep \"test result\"",
"description": "Count total test results",
"timeout": 120000
}
```
## Assistant
**Result** (success):
```
test result: ok. 52 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 164 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
```
## Assistant
253 tests all pass (was 252, +1 new `compound_bite_counters_only_on_your_creature` test).
Now let me update the docs. First, the ROADMAP to accurately describe the state.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"limit": 8,
"offset": 59
}
```
## Assistant
**Result** (success):
```
59→#### ~~Fight/Bite Mechanic~~ (PARTIAL)
60→`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) implemented. Fixed 6 cards. **Limitation**: Java uses two explicit player-chosen targets (your creature + their creature); our engine auto-selects controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers (e.g. Affectionate Indrik) are correct since source=creature. Spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support. Remaining cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.
61→
62→#### ~~Token Stat Parsing~~ (DONE)
63→`CreateToken` now parses P/T and keywords from `token_name` strings (e.g., '4/4 Dragon with flying' creates a 4/4 with flying). Cards using correctly-formatted token names now work.
64→
65→#### Aura/Enchant System
66→- Auras exist as permanents but don't attach to creatures
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md",
"new_string": "#### ~~Fight/Bite Mechanic~~ (DONE)\n`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) implemented with proper two-target selection via `TargetSpec::Pair { CreatureYouControl, OpponentCreature }`. Matches Java's `FightTargetsEffect` / `DamageWithPowerFromOneToAnotherTargetEffect` pattern. Compound effects (e.g. +1/+1 counter then bite) correctly apply pre-fight/bite effects only to `targets[0]` (your creature). Fixed 6 cards (Bite Down, Affectionate Indrik, Felling Blow, Knockout Maneuver, Piercing Exhale, Assert Perfection). ETB triggers (Affectionate Indrik) use `TargetSpec::OpponentCreature` with source as fighter. Remaining fight/bite cards blocked by modal spells (Batch 11), X-cost (Batch 15), or other missing systems.",
"old_string": "#### ~~Fight/Bite Mechanic~~ (PARTIAL)\n`Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage) implemented. Fixed 6 cards. **Limitation**: Java uses two explicit player-chosen targets (your creature + their creature); our engine auto-selects controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers (e.g. Affectionate Indrik) are correct since source=creature. Spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support. Remaining cards blocked by modal spells (Batch 11), X-cost (Batch 15), or complex compound effects.",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/ROADMAP.md has been updated successfully.
```
## Assistant
Now update the work queue.
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"limit": 35,
"offset": 28
}
```
## Assistant
**Result** (success):
```
28→
29→## Batch 2: Easy swaps — existing typed effects [DONE 2026-02-13]
30→
31→**Engine**: Modified `execute_effects` in `game.rs` to accept an optional `source: Option` parameter. When `AddCounters` or `RemoveCounters` effects have no targets, they now fall back to the source permanent (for self-targeting counter effects). Added test `add_counters_self_when_no_targets`.
32→
33→### 2a: DestroyAll — Day of Judgment
34→- [x] FDN: Day of Judgment — `Effect::Custom("Destroy all creatures.")` → `Effect::destroy_all("creatures")`
35→
36→### 2b: EntersTapped — Diregraf Ghoul
37→- [x] FDN: Diregraf Ghoul — `StaticEffect::Custom("Enters tapped.")` → `StaticEffect::EntersTapped { filter: "self".into() }`
38→
39→### 2c: CantBlock (target) — Frenzied Goblin, Brambleback Brute
40→- [x] FDN: Frenzied Goblin — `Effect::Custom("Target creature can't block this turn.")` → `Effect::CantBlock`
41→- [x] ECL: Brambleback Brute — `Effect::Custom("Target creature can't block this turn.")` → `Effect::CantBlock`
42→- **Note**: The work queue originally listed "Skoa Veteran" for batch 2c, but the actual card in ecl.rs was **Brambleback Brute**.
43→- Verify: these cards already have `TargetSpec::OpponentCreature` or similar targeting
44→
45→### 2d: Self -1/-1 counters — ECL blight creatures
46→These use `Effect::Custom("Put N -1/-1 counter(s) on .")` alongside working effects. Replace with `Effect::AddCounters`:
47→- [x] ECL: Blighted Blackthorn (x2) — `Custom("Put two -1/-1 counters on Blighted Blackthorn.")` → `Effect::add_counters("-1/-1", 2)` (appears twice, two abilities)
48→- [x] ECL: Sourbread Auntie — `Custom("Put two -1/-1 counters on Sourbread Auntie.")` → `Effect::add_counters("-1/-1", 2)`
49→- [x] ECL: Sting-Slinger — `Custom("Put a -1/-1 counter on Sting-Slinger.")` → `Effect::add_counters("-1/-1", 1)`
50→- [x] ECL: Heirloom Auntie — `Custom("Remove a -1/-1 counter from Heirloom Auntie.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
51→- [x] ECL: Encumbered Reejerey — `Custom("Remove a -1/-1 counter from Encumbered Reejerey.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
52→- [x] ECL: Reluctant Dounguard — `Custom("Remove a -1/-1 counter from Reluctant Dounguard.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
53→- [x] ECL: Bristlebane Battler — `Custom("Remove a -1/-1 counter from this creature.")` → `Effect::RemoveCounters { counter_type: "-1/-1", count: 1 }`
54→- **Engine tweak**: `execute_effects` now falls back to the source permanent when `AddCounters`/`RemoveCounters` have no targets (self-targeting counter effects).
55→
56→### 2e: Loot (draw then discard) — Icewind Elemental, Refute
57→- [x] FDN: Icewind Elemental — `Custom("When this creature enters, draw a card, then discard a card.")` → `Effect::draw_cards(1), Effect::discard_cards(1)`
58→- [x] FDN: Refute — `Custom("Counter target spell. Draw a card, then discard a card.")` → `Effect::counter_spell(), Effect::draw_cards(1), Effect::discard_cards(1)` + fixed TargetSpec to Spell
59→
60→### 2f: Simple ETB draw — Mistmeadow Council
61→- [x] ECL: Mistmeadow Council — `Custom("When this creature enters, draw a card.")` → `Effect::draw_cards(1)`
62→
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"pattern": "Batch 8\""
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"pattern": "Batch 8"
}
```
## Assistant
**Result** (success):
```
162:## Batch 8: Fight/Bite mechanic [DONE 2026-02-13]
```
## Assistant
### Tool: Read
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"limit": 40,
"offset": 162
}
```
## Assistant
**Result** (success):
```
162→## Batch 8: Fight/Bite mechanic [DONE 2026-02-13]
163→
164→**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Helper methods `find_fight_creature()` and `find_fight_target()` handle creature selection. **Known limitation**: Java uses two explicit player-chosen targets (your creature + opponent's creature via `FightTargetsEffect` / `DamageWithPowerFromOneToAnotherTargetEffect`); our engine auto-selects the controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers are correct (source=creature); spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support.
165→
166→**Cards fixed (6):**
167→- [x] FDN: Bite Down — `Custom` → `Effect::bite()`
168→- [x] FDN: Affectionate Indrik — ETB `Custom` → `Effect::fight()` + `TargetSpec::Creature`
169→- [x] FDN: Felling Blow — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::Creature`
170→- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::fight()`
171→- [x] TDM: Piercing Exhale — `Custom` → `Effect::fight()`
172→- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::fight()`
173→
174→**Tests added:** `fight_and_bite_effects`, `fight_auto_selects_creatures`
175→
176→**Skipped/Deferred:**
177→- TDM: Dragonclaw Strike — "Double P/T then fight" — doubling not implementable
178→- TDM: Dragon land (bite with Dragon-specific targeting) — custom target spec
179→- FDN: Primal Might — X-cost + fight (Batch 15)
180→- FDN: Tyvar's Stand (Choose one with fight) — modal (Batch 11)
181→- ECL: Kithkin Whirlwind (Choose two with fight) — modal (Batch 11)
182→- TLA: Earth Rumble — stub with no abilities defined
183→
184→---
185→
186→## Batch 9: AddCountersAll (mass counter placement)
187→
188→**Engine**: Need `Effect::AddCountersAll { counter_type, count, filter }` — similar pattern to `DestroyAll`/`DealDamageAll`. Puts N counters on all permanents matching filter.
189→
190→**Cards:**
191→- [ ] ECL: Darkness Descends — `Custom("Put two -1/-1 counters on each creature.")` → `Effect::AddCountersAll { counter_type: "-1/-1", count: 2, filter: "creatures" }`
192→
193→---
194→
195→## Batch 10: Compound self-counter + target effects
196→
197→**Engine**: These cards need the ability to put counters on self AND apply a separate effect to a target in the same triggered/activated ability. The self-counter part now works (Batch 2 source fallback), but combining it with a target effect in one resolution needs verification.
198→
199→**Cards:**
200→- [ ] ECL: Warren Torchmaster — begin combat: may blight 1 (self -1/-1 counter) to give target creature haste until EOT. Needs `add_counters("-1/-1", 1)` + `gain_keyword_eot("haste")` with target.
201→- [ ] ECL: Dream Seizer — ETB: self -1/-1 counter + each opponent discards (also depends on Batch 3 OpponentDiscards)
```
## Assistant
### Tool: Edit
**Args:**
```json
{
"file_path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md",
"new_string": "**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power) with proper two-target selection. Added `TargetSpec::Pair { CreatureYouControl, OpponentCreature }` and `TargetSpec::fight_targets()` builder for spell-based fight/bite. `select_targets_for_spec()` handles target selection by asking the decision maker. `resolve_fight_pair()` resolves fighter/target from explicit targets, source+target (ETB), or fallback auto-select. For compound effects (e.g. counter+bite), pre-fight/bite effects only apply to `targets[0]` (your creature), matching Java's per-effect target assignment.\n\n**Cards fixed (6):**\n- [x] FDN: Bite Down — `Custom` → `Effect::bite()` + `TargetSpec::fight_targets()`\n- [x] FDN: Affectionate Indrik — ETB `Custom` → `Effect::fight()` + `TargetSpec::OpponentCreature`\n- [x] FDN: Felling Blow — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`\n- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::bite()` + `TargetSpec::fight_targets()`\n- [x] TDM: Piercing Exhale — `Custom` → `Effect::bite()` + `TargetSpec::fight_targets()`\n- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`\n\n**Tests added:** `fight_and_bite_effects`, `fight_auto_selects_creatures`, `compound_bite_counters_only_on_your_creature`",
"old_string": "**Engine**: Added `Effect::Fight` (mutual damage) and `Effect::Bite` (one-way damage based on power). Helper methods `find_fight_creature()` and `find_fight_target()` handle creature selection. **Known limitation**: Java uses two explicit player-chosen targets (your creature + opponent's creature via `FightTargetsEffect` / `DamageWithPowerFromOneToAnotherTargetEffect`); our engine auto-selects the controller's strongest creature because `TargetSpec` only supports single-target. ETB triggers are correct (source=creature); spell-based fight/bite is a heuristic approximation. Full fix requires multi-target `TargetSpec` support.\n\n**Cards fixed (6):**\n- [x] FDN: Bite Down — `Custom` → `Effect::bite()`\n- [x] FDN: Affectionate Indrik — ETB `Custom` → `Effect::fight()` + `TargetSpec::Creature`\n- [x] FDN: Felling Blow — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::Creature`\n- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::fight()`\n- [x] TDM: Piercing Exhale — `Custom` → `Effect::fight()`\n- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::fight()`\n\n**Tests added:** `fight_and_bite_effects`, `fight_auto_selects_creatures`",
"replace_all": false
}
```
## Assistant
**Result** (success):
```
The file /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/work-queue.md has been updated successfully.
```
## Assistant
Now update the per-set remediation docs. Let me check which cards were changed.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs",
"pattern": "Knockout Maneuver|Piercing Exhale|Assert Perfection"
}
```
## Assistant
**Result** (success):
```
docs/work-queue.md:170:- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::bite()` + `TargetSpec::fight_targets()`
docs/work-queue.md:171:- [x] TDM: Piercing Exhale — `Custom` → `Effect::bite()` + `TargetSpec::fight_targets()`
docs/work-queue.md:172:- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`
docs/tdm-remediation.md:292:- [x] **Knockout Maneuver** — Fixed: `add_p1p1_counters(1), Effect::fight()`. (Batch 8)
docs/tdm-remediation.md:323:- [x] **Piercing Exhale** — Fixed: `Effect::fight()`. (Batch 8)
docs/ecl-remediation.md:397:- [x] **Assert Perfection** — Fixed: `boost_until_eot(1, 0), Effect::fight()`. (Batch 8)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i 's/Fixed: `add_p1p1_counters(1), Effect::fight()`. (Batch 8)/Fixed: `add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`. (Batch 8)/' /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/tdm-remediation.md",
"description": "Fix Knockout Maneuver remediation doc"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i \"s/Fixed: \\`Effect::fight()\\`. (Batch 8)/Fixed: \\`Effect::bite()\\` + \\`TargetSpec::fight_targets()\\`. (Batch 8)/\" /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/tdm-remediation.md",
"description": "Fix Piercing Exhale remediation doc"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
### Tool: Bash
**Args:**
```json
{
"command": "sed -i \"s/Fixed: \\`boost_until_eot(1, 0), Effect::fight()\\`. (Batch 8)/Fixed: \\`boost_until_eot(1, 0), Effect::bite()\\` + \\`TargetSpec::fight_targets()\\`. (Batch 8)/\" /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/ecl-remediation.md",
"description": "Fix Assert Perfection remediation doc"
}
```
## Assistant
**Result** (success):
```
(empty result)
```
## Assistant
Also update the FDN remediation doc entries for the fight/bite cards.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/fdn-remediation.md",
"pattern": "Bite Down|Affectionate Indrik|Felling Blow"
}
```
## Assistant
**Result** (success):
```
368:- [x] **Bite Down** -- Fixed: `Effect::bite()`. (Batch 8)
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/fdn-remediation.md",
"pattern": "Affectionate Indrik|Felling Blow"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs/fdn-remediation.md",
"pattern": "Affectionate|Felling"
}
```
## Assistant
**Result** (success):
```
No matches found
```
## Assistant
Those two are FDN Tier 3 cards that may not be in the remediation doc yet. That's fine, the work queue captures them.
Now let me verify the sed changes worked correctly.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/docs",
"pattern": "Knockout Maneuver|Piercing Exhale|Assert Perfection"
}
```
## Assistant
**Result** (success):
```
docs/ecl-remediation.md:397:- [x] **Assert Perfection** — Fixed: `boost_until_eot(1, 0), Effect::bite()` + `TargetSpec::fight_targets()`. (Batch 8)
docs/tdm-remediation.md:292:- [x] **Knockout Maneuver** — Fixed: `add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`. (Batch 8)
docs/tdm-remediation.md:323:- [x] **Piercing Exhale** — Fixed: `Effect::bite()` + `TargetSpec::fight_targets()`. (Batch 8)
docs/work-queue.md:170:- [x] ECL: Assert Perfection — `Custom` → `Effect::boost_until_eot(1, 0), Effect::bite()` + `TargetSpec::fight_targets()`
docs/work-queue.md:171:- [x] TDM: Piercing Exhale — `Custom` → `Effect::bite()` + `TargetSpec::fight_targets()`
docs/work-queue.md:172:- [x] TDM: Knockout Maneuver — `Custom` → `Effect::add_p1p1_counters(1), Effect::bite()` + `TargetSpec::fight_targets()`
```
## Assistant
All docs are consistent. Let me do a final verification — confirm the card files have the correct effects.
## Assistant
### Tool: Grep
**Args:**
```json
{
"-n": true,
"output_mode": "content",
"path": "/mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets",
"pattern": "Effect::fight\\(\\)|Effect::bite\\(\\)"
}
```
## Assistant
**Result** (success):
```
mtg-cards/src/sets/ecl.rs:1799: abilities: vec![Ability::spell(id, vec![Effect::boost_until_eot(1, 0), Effect::bite()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1231: abilities: vec![Ability::spell(id, vec![Effect::add_p1p1_counters(1), Effect::bite()], TargetSpec::fight_targets())],
mtg-cards/src/sets/tdm.rs:1255: abilities: vec![Ability::spell(id, vec![Effect::bite()], TargetSpec::fight_targets())],
mtg-cards/src/sets/fdn.rs:2305: vec![Effect::bite()],
mtg-cards/src/sets/fdn.rs:5252: vec![Effect::fight()],
mtg-cards/src/sets/fdn.rs:6017: vec![Effect::add_p1p1_counters(1), Effect::bite()],
```
## Assistant
Correct:
- **`Effect::fight()`**: Only Affectionate Indrik (fdn.rs:5252) — the only true mutual-damage card
- **`Effect::bite()`**: Bite Down (fdn.rs:2305), Felling Blow (fdn.rs:6017), Knockout Maneuver (tdm.rs:1231), Piercing Exhale (tdm.rs:1255), Assert Perfection (ecl.rs:1799)
This matches the Java source where only Affectionate Indrik uses `FightTargetSourceEffect` and all others use `DamageWithPowerFromOneToAnotherTargetEffect`.
Here's a summary of what was fixed:
**Fix 1 — Wrong effect classification (3 cards)**:
- Knockout Maneuver, Piercing Exhale, Assert Perfection changed from `Effect::fight()` to `Effect::bite()` to match Java's `DamageWithPowerFromOneToAnotherTargetEffect` (one-way damage, not mutual)
**Fix 2 — Compound targeting bug**:
- Modified `execute_effects()` to detect when a compound effect list contains Fight/Bite. Pre-fight/bite effects (AddCounters, BoostUntilEndOfTurn) now only apply to `targets[0]` (your creature), matching Java's per-effect target assignment where `AddCountersTargetEffect` targets only the first target.
**Fix 3 — New test**:
- Added `compound_bite_counters_only_on_your_creature` test verifying that +1/+1 counters go only on your creature, not the opponent's, in compound bite spells.
**253 tests pass** (was 252, +1 new test). All docs updated (ROADMAP.md, work-queue.md, tdm-remediation.md, ecl-remediation.md).