Vesper Review — Patch Delivery FLAG-046¶

Verdict: APPROVED — MERGE AND APPLY

Orion delivered 4 commits, 7 new tests, 65 adjacent-suite tests green. All 4 Atlas binding requirements answered with code anchors. Both pre-code rulings (D1, D2) honored. Both non-blocking observations addressed. One minor documentation inconsistency noted below — not blocking.

Ruling: Commit Order¶

C1 → C2 → C3 → C4 — matches pre-code ruling exactly. No deviation. Each intermediate commit imports cleanly per Orion's confirmation.

Atlas Binding Requirements — All Four Passed¶

Requirement 1 — Exact state transitions: ✅ Four transitions documented with trigger conditions, entry methods, episode budget flag, and cool-down flag:

Transition	Episode budget	Cool-down
ACTIVE → ANCHOR_IDLE	No	No
ANCHOR_IDLE → ACTIVE	N/A	N/A
ANCHOR_IDLE → DEGRADED	Yes (safety source)	Yes (if capped)
ANCHOR_IDLE → HALT	Does not exist	—

Requirement 2 — Entry/exit criteria: ✅ Full config field tables for both entry and exit evaluators. Critically: hysteresis enforced at config load (_validate_anchor_saturation_guard) — recovery_exit_bias_threshold_bps validated to be strictly less than bias_threshold_bps. This is config-level structural enforcement, not just convention.

Requirement 3 — Test coverage summary: ✅ All 5 Atlas-locked contracts (T1–T5) covered by 7 tests in test_anchor_idle_state.py — T4 and T5 each have two subtests covering drift and corridor independently. 65 adjacent-suite tests green. No net-new failures vs. baseline in the full regression (378 pre-existing, all known OrderSizeConfig/plotly/gateway signature failures).

Requirement 4 — ANCHOR_IDLE cannot silently bypass truth/drift/corridor: ✅ Proven by two code-level guarantees: - Single MODE_DEGRADED write site (main_loop.py:1697) — grep-verifiable. - _enter_degraded_mode hooks _exit_anchor_idle_on_escalation at main_loop.py:1635–1648 before any mode write. Cannot be bypassed. T4 tests assert call order.

Spec Compliance¶

D1 — Retire anchor from FLAG-044 in this branch: ✅ RECOVERY_CAPPED_SOURCES = (SOURCE_DRIFT, SOURCE_CORRIDOR). Anchor removed. _bump_episode_count(SOURCE_ANCHOR) logs [SOURCE_UNMAPPED_POST_FLAG_046] and returns 0 — cannot increment the cap. Covered by test_flag_044_recovery_cooldown::TestBumpEpisodeCount::test_bump_anchor_source_is_unmapped_post_flag_046. Before/after confirmed in the architecture summary.

D2 — Expand _current_truth_mode() to four values: ✅ VALID_MODES = (MODE_OK, MODE_ANCHOR_IDLE, MODE_DEGRADED, MODE_HALT). All call sites that previously handled 2–3 values updated: _current_truth_mode at main_loop.py:1579, execution pre-trade gate at execution_engine.py:1041, truth-check branching in inventory_truth_checker.py. No parallel predicate. No silent fall-throughs.

Non-Blocking Observations — Both Addressed¶

NB-1 — ANCHOR_IDLE_ESCALATED_TO_DEGRADED log token origin: ✅ Emitted from _exit_anchor_idle_on_escalation at main_loop.py:2139, which is called from inside _enter_degraded_mode before MODE_DEGRADED is written. Operator timeline is unambiguous: escalation marker first, then state write. Confirmed in T4 call-order assertions.

NB-2 — Anchor data unavailable while idle (fail-closed): ✅ Exit evaluator gates on both conditions holding — if data is unavailable or parse fails, conditions do not hold, stability counter resets to 0, engine stays in ANCHOR_IDLE. Fail-closed by design of the positive-gate exit path. Recovery restart preserves anchor-idle keys (unlike fresh session which clears them), so a crashed session mid-idle resumes correctly.

One Minor Documentation Note (non-blocking)¶

The regression command in Requirement 3's test coverage section uses bash-style \ line continuation:

python -m pytest tests/test_anchor_idle_state.py \
  tests/test_anchor_saturation_guard.py \
  ...

PowerShell line continuation is ` (backtick), not \. The Apply Instructions section at the bottom of the delivery memo correctly uses ` throughout — Katja should use those commands. The Requirement 3 block is documentation text only, not the operative apply instructions.

Post-merge items 3–6 reference "S49" but S49 has already run. Read as "S50" throughout.

Architecture: Confirmed Clean¶

Single MODE_DEGRADED write site — preserved exactly as pre-FLAG-046.
Execution pre-trade gate (execution_engine.py:1079) blocks submit in MODE_ANCHOR_IDLE at the same layer as DEGRADED and HALT.
Truth-check runs every tick regardless of mode — ANCHOR_IDLE does not suppress truth enforcement.
FLAG-047 cancel-fill race surface inherited unchanged — _enter_anchor_idle_mode calls _cancel_all_live_orders which already carries the tecNO_TARGET demotion path.
Recovery-restart anchor-idle key preservation matches FLAG-041 follow-up contract.
SOURCE_ANCHOR grep returns zero hits in _enter_degraded_mode call sites post-C3 — confirmed structurally unreachable.

Apply Instructions for Katja¶

Patches at: C:\Users\Katja\Documents\Claude Homebase Neo\02 Projects\NEO Trading Engine\08 Patches\patches\feat-anchor-idle-state\

From VS Code terminal:

cd C:\Users\Katja\Documents\NEO GitHub\neo-2026
git checkout main
git pull

# Defensive clear
git branch -D feat/anchor-idle-state 2>$null

git checkout -b feat/anchor-idle-state

Get-ChildItem "C:\Users\Katja\Documents\Claude Homebase Neo\02 Projects\NEO Trading Engine\08 Patches\patches\feat-anchor-idle-state" -Filter "*.patch" |
    Sort-Object Name |
    ForEach-Object { git am $_.FullName }

# Verify — 4 commits expected
git log --oneline main..HEAD

Expected log (topmost → oldest):

664212d test(anchor_idle): FLAG-046 C4 — 5 Atlas-locked behavioral tests
7e0ba1c feat(engine,config,tests): FLAG-046 C3 — retire FLAG-044 for anchor + rewire guard to ANCHOR_IDLE
502be63 feat(engine,execution): FLAG-046 C2 — ANCHOR_IDLE entry/exit methods + truth gate + startup reset
c3eba41 feat(state): FLAG-046 C1 — ANCHOR_IDLE mode + engine_state keys + stability counter

Regression (run before merging to main):

python -m pytest tests/test_anchor_idle_state.py `
  tests/test_anchor_saturation_guard.py `
  tests/test_flag_042_degraded_recovery.py `
  tests/test_flag_044_recovery_cooldown.py -q
# Expected: 65 passed, 2 subtests passed

Broader adjacent-FLAG suite (optional but recommended — confirms no regression in FLAG-036/037/042/044/047):

python -m pytest tests/test_anchor_idle_state.py `
  tests/test_anchor_saturation_guard.py `
  tests/test_flag_036_wallet_truth_reconciliation.py `
  tests/test_flag_042_degraded_recovery.py `
  tests/test_flag_044_recovery_cooldown.py `
  tests/test_flag_047_cancel_fill_race.py `
  tests/test_reconciler_cancelled_by_engine.py `
  tests/test_reconciler_conservative.py `
  tests/test_reconciler_anomaly_log.py -q

Once green → merge to main:

git checkout main
git merge feat/anchor-idle-state

Post-Merge Checklist¶

Mark FLAG-046 CLOSED in [C] Open Flags.md
Update CLAUDE.md FLAG-046 block: OPEN → CLOSED
Run realign dry-run before S50: python tools/realign_inventory_to_onchain.py --config config/config_live_stage1.yaml --db neo_live_stage1.db --dry-run (expected ~0 delta — no realignment required after S49)
Launch S50 with --duration-seconds 7200
Watch for [ANCHOR_IDLE_ENTER] — expected given S49 regime (+10 bps cap-locked). Engine should sit idle, not halt. If regime normalizes mid-session, watch for [ANCHOR_IDLE] exit conditions stable — resuming ACTIVE.
If S50 halts at duration_elapsed (not degraded_episode_limit_halt) → FLAG-046 confirmed in production

Delivery is clean. Apply when ready, Katja.

— Vesper, COO, BlueFly AI Enterprises