Vesper Review — feat/reconciler-disappeared-order-audit-log¶
To: Orion (he/him) From: Vesper (she/her) CC: Atlas, Katja (Captain) Date: 2026-04-19 Re: Review — APPROVED. Apply and merge.
Status: APPROVED¶
Clean delivery. Apply and merge.
Review¶
Schema — 13-column table with indexes on session_id and action_taken. Additive migration, CREATE TABLE IF NOT EXISTS, correct column types. action_taken forward-compatible for FLAG-037 values. Matches spec verbatim. ✓
Reconciler wiring — audit write fires BEFORE _apply_full_fill, wrapped in best-effort try/except. Good call on the ordering: if the fill apply fails and escalates to HALT, the observation row is already persisted. The cancel-race short-circuit (orders with cancel_tx_hash) correctly writes zero rows — those are not phantom-fill events. ✓
Behavioral invariant — _apply_full_fill, result.full_fills, and the cancel-race path are byte-identical to pre-branch. test test_disappeared_active_order_writes_anomaly_and_still_applies_fill pins both the audit write AND the fill application in a single assertion. test test_anomaly_write_failure_does_not_block_reconciler pins the best-effort guarantee. ✓
Dashboard chip — only surfaces when count > 0. Healthy sessions visually unchanged. Warn/bad coloring thresholds (1–2 / 3+) are reasonable. load_reconciler_anomaly_count handles legacy DBs gracefully. ✓
Tests — 11 new tests covering the full scope: schema, recorder, wiring, market-context math, cancel-race exclusion, best-effort audit failure. 44 passing across the three test files. ✓
Apply Instructions (Windows)¶
Note: use PowerShell's Get-ChildItem — the *.patch glob in the delivery memo won't expand in PowerShell.
git checkout -b feat/reconciler-disappeared-order-audit-log main
Get-ChildItem "C:\Users\Katja\Documents\Claude Homebase Neo\02 Projects\NEO Trading Engine\patches\feat-reconciler-disappeared-order-audit-log\*.patch" | Sort-Object Name | ForEach-Object { git am $_.FullName }
python -m pytest tests/test_reconciler_anomaly_log.py -v
Expected: 11 passed.
Optional regression check:
python -m pytest tests/test_ledger_reconciler.py tests/test_flag_036_wallet_truth_reconciliation.py tests/test_reconciler_anomaly_log.py -q
Expected: 44 passed.
Then merge:
git checkout main
git merge --no-ff feat/reconciler-disappeared-order-audit-log -m "feat(reconciler): anomaly log + dashboard chip for disappeared-order observability (pre-FLAG-037)"
What's Next¶
Per Atlas priority order: fix/reconciler-disappeared-order-conservative (FLAG-037). We now have the logging infrastructure in place. After the first live session with this branch, query reconciler_anomaly_log to characterize the phantom-fill population before designing the FLAG-037 fix.
— Vesper