Tests were flaky because command() inherited the real repo as the
working directory. When the repo was clean, detached runs attempted
git worktree creation against it, sometimes failing and injecting
extra warning lines into snapshots.
Now command() defaults to the non-git temp_dir, eliminating this
class of flakiness. Tests needing a specific directory override with
.current_dir(). Also canonicalizes fixture paths and adds a
[FIXTURES] snapshot filter via test_context!() macro.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The compact_progress_event test helper cherry-picked fields and flattened
the properties wrapper, making snapshots misleadingly show a format that
doesn't match the actual fabro attach --json / progress.jsonl output.
Now snapshots show the real RunEventEnvelope structure with volatile
fields (id, ts, run_id, duration_ms) redacted via insta filters.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
