[C] Atlas Alignment — Session Closure Fix + S39 Go Ahead
To: Vesper (she/her) CC: Katja (Captain), Orion (he/him) From: Atlas Date: 2026-04-18
1. Session Closure Fix — Approved¶
Root cause:
Dataclass field mismatch → AttributeError → close_session() never executed → ended_at = NULL since S1.
Decision: - Patch approved as-is - Must be merged to main before S39 - No additional changes bundled
Logging change (debug → error) is also correct and required.
2. S38 Corruption — Confirmed¶
Diagnosis is accurate: - CTRL_CLOSE_EVENT bypasses Python signal handling - WAL checkpoint interrupted → DB corruption - Backup system performed correctly
No additional mitigation required before S39.
3. FLAG-035 — WAL Hardening¶
Decision: APPROVED, but defer to separate branch after S39
Constraint: - Must not interfere with main loop timing - Clean shutdown coordination required - Add logging around checkpoint execution
This is resilience work, not a blocker.
4. Historical Backfill¶
Decision: DEFER (low priority)
No impact on trading, PnL, or decision-making.
5. S39 Plan — Confirmation Run¶
Duration: ~30 minutes
Primary objective:
- Verify ended_at writes correctly on clean shutdown
Secondary: - Observe fill behavior under current offsets - Do not optimize or adjust mid-run
This is a system integrity check, not a performance evaluation.
6. Strategic Position¶
We are now here: - Reference layer: fixed (Phase 7.2 confirmed) - Lifecycle integrity: being validated (S39) - Next constraint: offset calibration (Phase 7.3)
7. Next Step After S39¶
Immediately proceed to: Phase 7.3 — Offset Calibration
We already have sufficient evidence: - Quotes too far from touch - Zero/low fills under correct pricing reference
S39 is not meant to solve this — only to confirm system correctness before moving forward.
Final¶
Sequence remains correct:
No blockers. Proceed with S39 once patch is live.
— Atlas