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Add Trace IDs and URLs to Git CommitsPublic

The user wanted to create a git hook that attaches trace IDs from a local database as notes on commits, filtering to only recent traces. The hook was successfully implemented, tested, and installed, correctly adding trace IDs to commits. Later, the user asked about including shared URLs in the notes and triggering trace sharing from the hook, which was explored but found to require a heavier CLI runtime not ideal for a fast hook.

Agent

Claude Code

Model

Claude Opus 4.6

Shared

Feb 23, 3:31 PM

Messages533

Implement the following plan:

Git hook demo

Context

Get a working demo of trace IDs being written to git notes on commit. Minimal: one shell script, no CLI changes.

What we're building

A post-commit hook script that:

Queries ~/.traces/traces.db for traces whose directory matches the repo root
Writes matching trace external IDs as git notes on the new commit under refs/notes/traces

Branch: git-integration from main

New file: `cli/hooks/post-commit`

Shell script using sqlite3 (available on macOS by default, most Linux distros).

Respects TRACES_EVENTSTORE env var if set (same as the CLI does). Falls through silently if no DB exists or no traces match -- should never block a commit.

Verification

Create a new branch git-integration from main
Add the hook script
Install it: mkdir -p ~/.traces/hooks && cp cli/hooks/post-commit ~/.traces/hooks/ && chmod +x ~/.traces/hooks/post-commit && git config --global core.hooksPath ~/.traces/hooks
Use an agent in a git repo where traces has recorded something, make a commit
Run git notes --ref=traces show HEAD -- should print the trace IDs
Test that committing in a repo with no traces doesn't error

If you need specific details from before exiting plan mode (like exact code snippets, error messages, or content you generated), read the full transcript at: /Users/andrew/.claude/projects/-Users-andrew-code-traces-traces/3c299a07-84f9-42c8-819d-badac01387d5.jsonl

Let me first check how the CLI handles the DB path and TRACES_EVENTSTORE env var.

GreppedTRACES_EVENTSTORE

Greppedtraces\.db

Listedcli/hooks/**/*

Readevent-store.ts80 lines

Now let me check the DB schema to understand the traces table columns, particularly the directory and id columns.

GreppedCREATE TABLE.*traces

GreppedexternalId|external_id

GreppedexternalId

Good. The traces table in SQLite has id TEXT PRIMARY KEY and directory TEXT. The id column is what the CLI uses as the trace identifier, which maps to externalId in the API. Now let me check the existing git integration doc and the current branch state.

Listeddocs/git*.md

Readgit-integration.md

Now I have all the context I need. Let me create the branch and the hook script. I noticed a bug in the plan's script ([ -z "$IDS" ] || exit 0 should be && exit 0) — I'll fix that.

Now let me write a test for this. I'll create a shell-based test that sets up a temp git repo, populates a test SQLite database, runs the hook, and verifies the git notes.

Let me debug the hook.

The issue is on macOS: mktemp -d returns /var/folders/... but git rev-parse --show-toplevel resolves the symlink to /private/var/folders/.... The directory stored in the DB doesn't match the resolved path.

I need to handle this in both the hook (resolve the repo root to a real path) and the test (store the resolved path in the DB). Let me fix the hook first.

Readpost-commit

Let me check how the CLI stores the directory value in traces.

Greppeddirectory

Grepped\.directory

The issue is macOS symlinks: mktemp -d returns /var/folders/... but git rev-parse --show-toplevel resolves to /private/var/folders/.... In practice this only affects temp directories (real repos under /Users don't have this issue), but let me make the hook resolve symlinks to be safe.

Now fix the test to also resolve the temp dir path when inserting into the DB.

Readpost-commit.test.sh

I need to resolve the temp dir paths in the test so they match what pwd -P returns inside the hook.

All 6 tests pass. Let me verify the final state of the hook script.

Readpost-commit

Now let me also run the existing project tests to make sure nothing is broken.

Let me check if the failing test is pre-existing (not caused by our changes).

Pre-existing failures (missing @clack/prompts module and a server verification issue), not related to our changes.

Here's a summary of what was done:

New files:

cli/hooks/post-commit — Shell script that queries ~/.traces/traces.db for traces whose directory matches the current repo root, then writes their IDs as git notes under refs/notes/traces on HEAD. Respects TRACES_EVENTSTORE env var (absolute or relative path). Fails silently if sqlite3 is missing, no DB exists, or no traces match.
cli/hooks/post-commit.test.sh — Tests covering: writing trace IDs as notes, no-match produces no note, missing DB exits cleanly, relative TRACES_EVENTSTORE resolution, and no-match directory exits cleanly. All 6 pass.

Bug fix from the plan: The plan had [ -z "$IDS" ] || exit 0 which would exit when IDs are found. Fixed to [ -n "$IDS" ] || exit 0.

Additional fix: Added symlink resolution via cd ... && pwd -P so the hook works correctly on macOS where /var is symlinked to /private/var.

Want me to commit this?

first install the hook

Installed. The hook is at ~/.traces/hooks/post-commit and core.hooksPath is set globally. Next commit in any repo will trigger it.

<bash-input>git branch</bash-input>

<bash-stdout> chore/dependabot-config
ci/add-test-workflow
ci/api-tests
docs/nightly-postgres-backups
feat/rate-limiting
feat/scrub-secrets-on-upload
fix/adapter-source-path-resolution
fix/batch-upsert-chunking
fix/cap-limit-query-params
fix/cross-platform-ci
fix/deduplicate-feed-lookups
fix/flaky-ci-tests
fix/identities-composite-index
fix/invite-require-auth
fix/medium-security-fixes
fix/message-count-full-table-scan
fix/oauth-fresh-state
fix/oauth-xss
fix/scope-externalid-index-to-namespace
fix/sqlite-database-locked
fix/sync-adapter-reads
fix/zizmor-actions-security

git-integration
git-integration-doc
main
perf/batch-namespace-deletion
perf/batch-parts-query
perf/debounce-last-used-at
perf/diff-parts-on-update</bash-stdout><bash-stderr></bash-stderr>

commit this

We're inside cli/ already. The git status showed hooks/ as the untracked path.

Let me check if the hook fired on that commit.

The hook fired and attached 16 trace IDs to the commit. Committed as f57dd12.

16?

Yeah, that's every trace ever recorded in this directory. The query has no time filter — it returns all traces whose directory matches the repo root, including old finished ones.

Should I scope it to only recent traces (e.g., last 24 hours, or since the previous commit)?

yeah we need to be a bit smarter, how does git-ai handle that?

Ran sub-agentResearch git-ai attribution

Let me look at the actual git-ai repo.

Listed**/post-commit*in //tmp/git-ai-inspect

Greppedpost.commit|post_commit

Readpost_commit.rs

Readcommit_hooks.rs

Readcheckpoint.rs80 lines

Greppedworking_log_for_base_commit

git-ai takes a very different approach. It runs a pre-commit checkpoint that snapshots the working tree, maintains a per-commit working log tracking which files each agent touched, then at post-commit computes line-level attributions from the diff. It doesn't match sessions by directory at all -- it tracks edits continuously.

For our case (just attaching trace IDs), a simpler heuristic works: only include traces whose last activity timestamp is after the previous commit. That way each commit only picks up traces that were active during the work that produced it.

Readpost-commit

Now update the tests to cover the timestamp filtering.

Readpost-commit.test.sh

All 9 tests pass. Now reinstall the updated hook and let me clean up.

The hook now filters by timestamp: it only includes traces whose last activity (timestamp column, in ms) is at or after the previous commit's author date. First commits in a repo still include all matching traces. Want me to commit this?

yeah commit

Down from 16 to 1. That's the current active trace for this session.

is the id the same as a url slug?

The id in the local DB is a UUID (a8f01d3c-295f-4043-ae2a-417299a74100), but the URL you shared uses a different slug format (jn75ck1sekp0z805jnf3fvqsjs81qs1b). Let me check how those relate.

Grepped/s/|shared_url|shareUrl|share.*url

Greppedshared_url

No shared_url stored for this trace. The URL slug (jn75ck1sekp0z805jnf3fvqsjs81qs1b) is a separate server-side identifier, not the same as the local id (which is a UUID). The id column is what gets sent to the API as externalId, and the slug in the /s/ URL is something else -- probably the Convex document ID or a share token.

So the note currently says traces:a8f01d3c-295f-4043-ae2a-417299a74100 which is the externalId, and the API has GET /v1/traces/:externalId to look it up. The /s/ URL uses a different identifier. Both should resolve to the same trace but through different routes.

Does that match your understanding, or should the note contain the share slug instead?

can we include the shared url in the note if it exists

Readpost-commit

Now update the tests.

Readpost-commit.test.sh

All 12 tests pass. Reinstalling the hook.

200 of 533

Git hook demo

Context

What we're building

New file: cli/hooks/post-commit

Verification

Git hook demo

Context

What we're building

New file: cli/hooks/post-commit

Verification

New file: `cli/hooks/post-commit`

New file: `cli/hooks/post-commit`