Clarify and Simplify Filter and Label Usage

Summary

I'm in the middle of working on @docs/projects/filter-refactoring.md . One thing I noticed that has to be updated is that @frontend/lib/message-registry.ts:21-30 mesage type configs have a label and shortLabel. label is fine, but shortLabel is actually supposed to be actionLabel which is the label we'd use for the accordion hover card preview or the message components themselves where we're describing the action in past tense terms (ex: Edit -> Edited, Run Command -> Ran Command, Thinking -> Thought, etc). make that update to the message registry

Now I'll update all the message type entries with proper past-tense action labels.

Reverted. The linter is happy now.

I've improved the docstring to clarify what each return value contains:

43:56:frontend/lib/filter-utils.ts

/** * Parse filters from URL search params. * * Returns two sets of filter criteria: * - `filters`: View modes (highlights) and message kinds (user_message, tool_call, etc.) * - `toolTypes`: Specific tool type sub-filters (read, edit, grep, etc.) */

/** * Parse filters from URL search params. * * Returns two sets of filter criteria: * - `filters`: View modes (highlights) and message kinds (user_message, tool_call, etc.) * - `toolTypes`: Specific tool type sub-filters (read, edit, grep, etc.) */

The naming isn't perfect, but at least the comment now makes the distinction clear. If you want to rename the return values to something more descriptive (like viewFilters and toolFilters), that would require updating all call sites - let me know if you'd prefer that.

if we had to make the model reflect reality, how would we do ti?

Good question. The current model conflates three distinct concepts into one MessageFilter type. Here's what reality looks like:

Three distinct filter concepts:

View Mode (mutually exclusive): "all" | "highlights" — determines the base view
Message Kinds (multi-select): "user_message" | "agent_text" | "agent_thinking" | "tool_call" — filters by content type
Tool Types (multi-select, sub-filter of tool_call): "read" | "edit" | "grep" | etc.

A more accurate model:

typescript

// types.tstype ViewMode = "all" | "highlights";
type MessageKind =   | "user_message"   | "agent_text"   | "agent_thinking"   | "tool_call";
type ToolType =   | "read"   | "edit"   | "write"   | "delete"   | "grep"   | "glob"   | "terminal_command"  // ... etc (could derive from MESSAGE_TYPES where category === "tool_type")

// types.tstype ViewMode = "all" | "highlights";
type MessageKind =   | "user_message"   | "agent_text"   | "agent_thinking"   | "tool_call";
type ToolType =   | "read"   | "edit"   | "write"   | "delete"   | "grep"   | "glob"   | "terminal_command"  // ... etc (could derive from MESSAGE_TYPES where category === "tool_type")

Then the parser would return:

typescript

parseFiltersFromUrl(searchParams): {  viewMode: ViewMode;           // single value, defaults to "all"  messageKinds: MessageKind[];  // which kinds to show (empty = all)  toolTypes: ToolType[];        // sub-filters under tool_call}

parseFiltersFromUrl(searchParams): {  viewMode: ViewMode;           // single value, defaults to "all"  messageKinds: MessageKind[];  // which kinds to show (empty = all)  toolTypes: ToolType[];        // sub-filters under tool_call}

This makes the semantics explicit:

viewMode is a single choice, not an array
messageKinds are separate from view modes
Tool types remain their own concept

Want me to implement this? It would touch types.ts, filter-utils.ts, and the components that use them.

what's the point of normalizeFilter in @frontend/lib/filter-utils.ts ?

Looking at the usage, there are two parallel systems:

normalizeFilter → single value for "what mode am I in?" (filter)
- Used for view mode checks: filter === "highlights", filter === "all"
- Passed to components like TraceFilterToggle
- Legacy single-select approach
parseFiltersFromUrl → arrays for multi-select (parsedFilters, parsedToolTypes)
- Supports ?filter=user_message&filter=tool_call
- Newer multi-select approach

They're redundant and confusing. The code is straddling two models.

If we implemented the cleaner model I proposed:

typescript

parseFiltersFromUrl(searchParams): {  viewMode: ViewMode;           // replaces normalizeFilter  messageKinds: MessageKind[];    toolTypes: ToolType[];        }

parseFiltersFromUrl(searchParams): {  viewMode: ViewMode;           // replaces normalizeFilter  messageKinds: MessageKind[];    toolTypes: ToolType[];        }

Then normalizeFilter would be absorbed into parseFiltersFromUrl as the viewMode return value, and we'd delete the separate function.

The current situation looks like incremental evolution where multi-select was added but the old single-value logic wasn't fully migrated. Do you want to clean this up as part of the filter refactoring?

why you add these back? @frontend/lib/types.ts:28-30 they aren't actual filters

I didn't add those - they were already in the file. But you're right, they shouldn't be there if they're not actual filters. Let me check what's actually in the file and clean it up.

Those were pre-existing, not added by me. They look like part types that got mixed into the filter type by mistake. Let me remove them.

Done. MessageFilter now only contains actual filters:

View modes: "all" | "highlights"
Message kinds: "user_message" | "agent_text" | "agent_thinking" | "tool_call"

The removed values (tool_result, code_edit, error) were part types, not filter types.

For the code present, we get this error:

This comparison appears to be unintentional because the types 'MessageKind' and '"tool_result"' have no overlap.

This comparison appears to be unintentional because the types 'MessageKind' and '"tool_result"' have no overlap.

Fix it, verify, and then give a concise explanation. @frontend/components/messages/MessageAccordion.tsx:180-183

The issue is getMessageKind returns "tool_result" at runtime (line 35) but the type no longer includes it. I need to fix both the function and the filtering code.

Fixed. Here's the summary:

Problem: Removing "tool_result", "code_edit", "error" from MessageKind type caused type errors where code was comparing against those values.

Fixes:

message-utils.ts:
- getMessageKind() now returns "tool_call" for tool results (they're part of the same flow)
- Added isToolResultMessage() helper for filtering standalone result messages
- Removed dead cases from messageKindLabel() switch
MessageAccordion.tsx / MessageList.tsx:
- Changed getMessageKind(m) !== "tool_result" → !isToolResultMessage(m)
- Removed || kind === "code_edit" checks (edit tools are just tool_call with specific names)

what's the dif between buildFilterUrl and createFilterModeUrl?

Two different use cases:

	`buildFilterUrl`	`createFilterModeUrl`
Purpose	Multi-select: set arbitrary filters + tool types	Single-select: switch to one mode
Input	Arrays: `filters[]`, `toolTypes[]`	Single value: `mode`
URL method	`append()` (adds multiple)	`set()` (replaces with one)
Returns	Query string only: `?filter=x&filter=y`	Full path: `/path?filter=x`
Used by	Sidebar checkboxes (multi-select)	Toggle button, keyboard shortcuts

Example:

typescript

// Multi-select: "Show user messages AND tool calls, filtered to read/edit"buildFilterUrl(["user_message", "tool_call"], ["read", "edit"], params)// → "?filter=user_message&filter=tool_call&toolType=read&toolType=edit"
// Single mode: "Switch to highlights view"createFilterModeUrl("highlights", "/s/123", params)// → "/s/123?filter=highlights"

// Multi-select: "Show user messages AND tool calls, filtered to read/edit"buildFilterUrl(["user_message", "tool_call"], ["read", "edit"], params)// → "?filter=user_message&filter=tool_call&toolType=read&toolType=edit"
// Single mode: "Switch to highlights view"createFilterModeUrl("highlights", "/s/123", params)// → "/s/123?filter=highlights"

This is more evidence of two systems coexisting — createFilterModeUrl is the old single-select approach, buildFilterUrl is the newer multi-select. They could probably be unified.

i feel like we just need one function for setting the url for the filter

Agreed. Here's a unified approach:

typescript

/** * Build a filter URL from the given state. *  * @param state - Filter state (viewMode, messageKinds, toolTypes) * @param pathname - If provided, returns full path; otherwise just query string * @param baseParams - Existing URL params to preserve */export function buildFilterUrl(  state: {    viewMode?: "all" | "highlights";    messageKinds?: MessageKind[];    toolTypes?: string[];  },  baseParams: URLSearchParams,  pathname?: string): string {  const params = new URLSearchParams(baseParams.toString());  params.delete("filter");  params.delete("toolType");
  const { viewMode, messageKinds = [], toolTypes = [] } = state;
  // "all" = no filter param (default)  // "highlights" = single filter param  // messageKinds = multiple filter params  if (viewMode === "highlights") {    params.set("filter", "highlights");  } else if (messageKinds.length > 0) {    messageKinds.forEach((kind) => params.append("filter", kind));    toolTypes.forEach((type) => params.append("toolType", type));  }
  const query = params.toString();  const queryString = query ? `?${query}` : "";  return pathname ? `${pathname}${queryString}` : queryString;}

/** * Build a filter URL from the given state. *  * @param state - Filter state (viewMode, messageKinds, toolTypes) * @param pathname - If provided, returns full path; otherwise just query string * @param baseParams - Existing URL params to preserve */export function buildFilterUrl(  state: {    viewMode?: "all" | "highlights";    messageKinds?: MessageKind[];    toolTypes?: string[];  },  baseParams: URLSearchParams,  pathname?: string): string {  const params = new URLSearchParams(baseParams.toString());  params.delete("filter");  params.delete("toolType");
  const { viewMode, messageKinds = [], toolTypes = [] } = state;
  // "all" = no filter param (default)  // "highlights" = single filter param  // messageKinds = multiple filter params  if (viewMode === "highlights") {    params.set("filter", "highlights");  } else if (messageKinds.length > 0) {    messageKinds.forEach((kind) => params.append("filter", kind));    toolTypes.forEach((type) => params.append("toolType", type));  }
  const query = params.toString();  const queryString = query ? `?${query}` : "";  return pathname ? `${pathname}${queryString}` : queryString;}

Usage:

typescript

// Switch to highlightsbuildFilterUrl({ viewMode: "highlights" }, params, pathname)
// Multi-select message kindsbuildFilterUrl({ messageKinds: ["user_message", "tool_call"], toolTypes: ["read"] }, params, pathname)
// Clear all (show everything)buildFilterUrl({ viewMode: "all" }, params, pathname)

// Switch to highlightsbuildFilterUrl({ viewMode: "highlights" }, params, pathname)
// Multi-select message kindsbuildFilterUrl({ messageKinds: ["user_message", "tool_call"], toolTypes: ["read"] }, params, pathname)
// Clear all (show everything)buildFilterUrl({ viewMode: "all" }, params, pathname)

This also aligns with the cleaner type model we discussed earlier. Want me to implement this and update the call sites?

go back to having just filters instead of viewMode and messageKinds, i think it's more confusing

Makes sense. Simpler is better. One function with an optional pathname:

typescript

export function buildFilterUrl(  filters: MessageFilter[],  toolTypes: string[],  baseParams: URLSearchParams,  pathname?: string): string

export function buildFilterUrl(  filters: MessageFilter[],  toolTypes: string[],  baseParams: URLSearchParams,  pathname?: string): string

With pathname: returns /path?filter=x (replaces createFilterModeUrl)
Without pathname: returns ?filter=x (current behavior)

Want me to implement this and update the call sites?

I'll read the full message registry file to understand the current structure and update the type and all usages.

Let me verify the changes and check for any linter errors.

Done. I've updated MessageTypeConfig to use actionLabel instead of shortLabel, with past-tense action descriptions:

Type change:

shortLabel: string → actionLabel: string with comment explaining it's for hover cards/messages in past tense

Message kinds:

Type	actionLabel
user_message	"Prompted"
agent_text	"Responded"
agent_thinking	"Thought"
tool_call	"Called Tool"

Tool types:

Type	actionLabel
read	"Read"
edit	"Edited"
write	"Created"
delete	"Deleted"
grep	"Searched"
glob	"Found Files"
terminal_command	"Ran Command"
web_search	"Searched Web"
web_fetch	"Fetched URL"
task	"Delegated"
todo	"Updated Todos"
lsp	"Queried LSP"
notebook_read	"Read Notebook"
notebook_edit	"Edited Notebook"
unknown	"Used Tool"

@frontend/lib/filter-utils.ts:19-26 why aren't tool calls considered valid filters? can't you filter for them?

Let me read the full file to understand the context.

tool_call IS in VALID_FILTERS (line 25). What's not there are the specific tool types like "read", "edit", "grep", etc.

This is intentional — the filtering uses a two-level system:

filter param → message kinds (top-level): user_message, agent_text, agent_thinking, tool_call, plus special modes all/highlights
toolType param → specific tool types (sub-filters): read, edit, grep, etc.

You can see this in parseFiltersFromUrl (lines 43-58):

43:58:frontend/lib/filter-utils.ts

export function parseFiltersFromUrl(searchParams: URLSearchParams): {  filters: MessageFilter[];  toolTypes: string[];} {  const rawFilters = searchParams.getAll("filter");  const filters = rawFilters    .map((f) => f.toLowerCase())    .filter(      (f): f is MessageFilter =>        VALID_FILTERS.has(f as MessageFilter) && f !== "all"    );
  const toolTypes = searchParams.getAll("toolType");
  return { filters, toolTypes };}

export function parseFiltersFromUrl(searchParams: URLSearchParams): {  filters: MessageFilter[];  toolTypes: string[];} {  const rawFilters = searchParams.getAll("filter");  const filters = rawFilters    .map((f) => f.toLowerCase())    .filter(      (f): f is MessageFilter =>        VALID_FILTERS.has(f as MessageFilter) && f !== "all"    );
  const toolTypes = searchParams.getAll("toolType");
  return { filters, toolTypes };}

So a URL like ?filter=tool_call&toolType=read&toolType=edit would show only read and edit tool calls. The tool types are validated elsewhere (likely against MESSAGE_TYPES in the registry where category === "tool_type").

maybe we change the language to make that clear. becuase the function is "parseFiltersFromUrl", and it returns "filters" and "toolTypes", which makes me think that all the filters are in "filters" and leaves me confused about what the tooltypes are (also filters).

Good catch. The naming is confusing because toolTypes are also filters conceptually. Let me check the types and usages, then propose clearer naming.

The types file already has MessageKind (line 32) which is exactly what filters actually contains. I'd suggest renaming:

filters → messageKinds (matches the existing type name)
toolTypes stays as is (already specific)

This makes it clear that parseFiltersFromUrl returns two types of filter criteria: message kinds and tool types.

Let me update the code.

Now I'll update the call sites.

I can see shortLabel is only used within this file. I'll update the type definition and all the values to use actionLabel with appropriate past-tense descriptions.

is highlights a message kind?

No, you're right. Looking at the types:

MessageKind explicitly excludes both "all" and "highlights" because they're view modes, not message kinds. But the current filter logic only excludes "all":

48:55:frontend/lib/filter-utils.ts

  const messageKinds = rawFilters    .map((f) => f.toLowerCase())    .filter(      (f): f is MessageFilter =>        VALID_FILTERS.has(f as MessageFilter) && f !== "all"    );

  const messageKinds = rawFilters    .map((f) => f.toLowerCase())    .filter(      (f): f is MessageFilter =>        VALID_FILTERS.has(f as MessageFilter) && f !== "all"    );

I should also exclude "highlights" and use the proper MessageKind type.

Now let me update the call sites and check for linter errors.

The type change exposed comparisons with "highlights" that are now impossible. Let me read those lines to understand the logic.

stop stop stop, you shouldn't include Highlihgts from the filters. it's a very important filter! same with "all", it's just not a messageKind, so you can't call it that

You're right, I went in the wrong direction. "Highlights" is a valid filter that needs to be parsed from the URL - it's just not a message kind. The issue is purely naming, not filtering behavior.

Let me revert and think more carefully. The real options are:

Keep filters / toolTypes but document better
Use names that don't claim they're "message kinds" - maybe viewFilters / toolFilters

Let me revert the changes.