The original build_track_index spawned 5+ git subprocesses per track
folder (244 tracks * 5 calls = 1200+ subprocesses). That exceeded the
120s NFR1 budget. Replaced with a single 'git log --all --name-only'
pass + a mutable _TrackAccumulator; reduces git subprocess count from
1200+ to 1.
Also adds 3 smoke tests for build_subagent_task_index,
build_session_index, build_track_index (covering previously untested
pure-function indexers). 23 tests pass; coverage up from 39% to 61%.
Deleted scripts/audit/generate_chronology.py + chronology_quality_gate.py
after repeated corruption incidents (auto-classifier drifted from
user intent, silently rewrote rows). chronology.md is now maintained
by hand: add a row at the top when a track ships/abandons/is archived.
Updated conductor/workflow.md §Chronology Maintenance and
conductor/tracks.md §Archiving a track to reflect manual maintenance.
Added 40 rows to conductor/chronology.md for the 2026-07-05 archive
batch, with archive-folder paths and deferral notes where applicable.
Removed 12 archived-track rows from conductor/tracks.md Active Tracks
table (rows 2, 3, 7c, 16, 17, 23b, 23c, 23d, 25, 26, 29, 29c) and
their track-detail anchors.
Wrote docs/reports/ARCHIVE_REVIEW_20260705.md: a categorized index
of unfinished work items from the archived tracks' state.toml files
that remain relevant to the codebase, with a ranked follow-up list.
ed