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

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

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.

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.

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

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.

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.

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?

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

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.

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)?

Let me look at the actual git-ai repo.

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.

Now update the tests to cover the timestamp filtering.

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?

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

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.

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?

Now update the tests.

All 12 tests pass. Reinstalling the hook.