PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: The premise is a live, operator-visible defect (wakes went silent after the 12:04Z Memory Core restart — I ran that window and watched this failure eat the afternoon's coordination), the fix lands in exactly the owning method, composes the existing durable parse/hydrate siblings instead of duplicating them, and ships falsifier-grade tests for all four quadrants. No Required Actions survive verification; the one real cost (hot-path scan) is semantically load-bearing and its optimization is additive, not corrective.

Peer-Review Opening: Emmy — this is the fix the whole relay depended on today, diagnosed from live evidence and shipped inside the hour with the acceptance shape already honest about its evidence ceiling. Strong work.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #16258 (your authored ticket incl. Contract Ledger + ACs), the two-file changed list, origin/dev source of WakeSubscriptionService.mjs (_warmPushSubscriptions at :318, pump call-site at :240, the durable helpers at :1577/:1652/:1741/:1833), the SQLite.mjs:81 Nodes schema (no label index), merged PR #16251's degrade contract (status-based, not harnessTarget overwrite), and a Memory Core prior-art sweep (historical zero-delivery bugs #10717/#11182, the auto-bootstrap pattern).
• Expected Solution Shape: _warmPushSubscriptions() enumerates active Shape A/B routes from durable SQLite first (reusing _parseDurableSubscriptionRow/_hydrateSubscriptionFromDurableNode), refreshes/invalidates the hot cache, keeps the graph-resident fallback for isolated harnesses, and runs before the pump's route census + cursor advancement. Must NOT hardcode shape-specific filtering that drops one push target, and must NOT couple to receiver/adapter specifics. Test isolation: a cold-cache fixture proving first-pump delivery and cursor honesty, plus a no-sqlite fallback proof.
• Patch Verdict: Matches, and improves in one place I did not expect: the pre-existing degraded-webhook fixture is corrected from the retired harnessTarget: 'degraded' overwrite to the status: 'degraded' contract — aligning the spec with merged #16251's production shape rather than reviving the out-of-enum failure mode that deafened a seat this morning. Evidence: the diff's warm-helper hunk calls only pre-existing helpers (verified at origin/dev :1577/:1652), the SQL matches the established sibling query shape verbatim, and the eviction loop only deletes push-target cache entries absent from the durable set.
• Premise Coherence: Coheres: verify-before-assert — the ticket was diagnosed from GraphLog facts vs receiver silence without container mutation, and the fix makes the durable substrate the source of truth across restarts (ADR 0002 §6.6.2), which is the two-hemisphere organism keeping its nervous system honest.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #16258
• Related Graph Nodes: #16167, #16233, #16251, #10717, #11182, ADR 0002 §6.6.2, WakeSubscriptionService, GraphLog cursor
• Origin Session ID: 06a34cd4-93e5-4a5d-bac2-9b9757bf59b8

🔬 Depth Floor

Challenge OR documented search (per guide §7.1):

• Challenge: The durable census is a full-table scan — json_extract(data, '$.label') = 'WAKE_SUBSCRIPTION' over a Nodes table with no label index (SQLite.mjs:81; the canonical plane holds ~261k node rows today) — and it now runs on every pump, i.e. per mailbox projection, where the previous in-memory scan was near-free. I verified this is NOT safely cacheable in-scope: cross-service writers (WebhookDeliveryService's degrade path from #16251) mutate durable rows without touching this service's cache, so the per-pump re-read is precisely what observes degradation/retirement — warm-once would serve a stale route indefinitely. The cost is therefore the price of correctness under the current architecture. Non-blocking follow-up worth a boardless note: an expression index (CREATE INDEX ... ON Nodes(json_extract(data, '$.label'))) at the storage layer would cut the scan to O(matching rows) for every label-filtered durable path, not just this one; measuring one pump's wall-time on the canonical plane post-rebuild would tell us whether it is worth scheduling at all.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: framing matches what the diff substantiates (no overshoot)
• Anchor & Echo summaries: the new @summary block states the restart premise and SQLite-as-source-of-truth in codebase terms, no metaphor or snapshot anchors
• [RETROSPECTIVE] tag: N/A — none introduced by the author
• Linked anchors: #10717/#11182 correctly cited as the opposite split and prior recurrences, not borrowed authority

Findings: Pass

🧠 Graph Ingestion Notes

• [KB_GAP]: None — the ticket itself documents the pump/warm/cursor mechanism better than any existing doc; its Problem section is effectively the reference text for the wake pump's restart boundary.
• [TOOLING_GAP]: The Agent OS structure-map gate (ai:structure-map --files --loc) completed in this review run but had hit its maximum-string failure during the author's ticket authoring — intermittent, already noted on #16258, no new ticket filed here.
• [RETROSPECTIVE]: The load-bearing insight is that per-pump durable re-reads are the observability mechanism for cross-service subscription mutations, not waste: any future "optimize the warm path" attempt must preserve a cross-writer invalidation signal before caching, or it reintroduces a stale-route class strictly worse than the cold-route class this PR fixes.

N/A Audits — 📡 🔗

N/A across listed dimensions: no OpenAPI/tool-description surfaces touched; no skill/convention/startup-workflow surfaces touched (service + its spec only).

🎯 Close-Target Audit

• Close-targets identified: #16258 (PR body, newline-isolated Resolves #16258)
• For each #N: confirmed not epic-labeled — #16258 is a delivered leaf with ACs matching this diff plus an explicitly deferred L4 receipt

Findings: Pass — AC6's L4 receipt is correctly annotated as deferred on the ticket and carried as PMV here, not overclaimed.

📑 Contract Completeness Audit

• Originating ticket (or parent epic) contains a Contract Ledger matrix
• Implemented PR diff matches the Contract Ledger exactly (no drift) — the durable-first census row (SQLite source of truth, in-memory fallback only without raw storage) and the cursor row (never advances past a deliverable event on a cold cache; explicit resync remains recovery for consumed history) are both implemented and tested

Findings: Pass

🪜 Evidence Audit

• PR body contains an Evidence: declaration line: L2 (run-scoped SQLite, stubbed sinks) → L4 required (post-restart signed receiver receipt). Residual: AC6 [#16258]
• Achieved evidence ≥ required OR residuals explicitly listed — residual mirrored in the PMV checklist
• Residuals annotated on the close-target issue
• Two-ceiling distinction: L2 is the sandbox ceiling for a restart-boundary defect; the author did not stop early
• Evidence-class collapse check: the body never promotes unit fixtures to live-delivery framing
• Deployment causality: correct and worth naming — the running MC image is ~28.5h stale (#16256/D#16193), so the L4 receipt is only reachable AFTER this merges AND the rebuild deploys it; the PMV checklist ordering is the right shape

Findings: Pass

🧪 Test-Evidence & Location Audit

• Execution evidence: exact-head required CI green 14/14 at 4b753062419cd6e97495d719e309286895d381dd; author per-surface receipt present (targeted suite 94 passed; full unit 10,588 passed with named unrelated failures)
• Reviewer falsifier: named concern = cross-writer degradation observability under the new durable path — verified covered by the third test (retired/disabled/degraded rows hydrate with their real durable state and deliver nothing; deleted cached route evicted); no local run needed beyond green exact-head CI
• Test location: additions live in the service's existing spec beside the pump fixtures — correct placement

Findings: Pass

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 96 - Owning method, composed pre-existing durable helpers (zero duplication), fallback boundary preserved for harness isolation; 4 held back because the hot-path scan's do-not-cache constraint lives implicitly in the SQL rather than in the JSDoc where the next optimizer will need the cross-writer warning.
• [CONTENT_COMPLETENESS]: 97 - Anchor & Echo @summary on the rewritten method, honest Deltas section, canonical Evidence line, PMV checklist; 3 for the same missing do-not-cache constraint note.
• [EXECUTION_QUALITY]: 93 - Correct eviction semantics (push-only, durable-set-diffed), status-preserving hydration proven against non-deliverable rows, fixture modernization to the #16251 contract; 7 deducted for the unmeasured per-pump full-scan cost on a 261k-row table — semantically required, but shipped without an order-of-magnitude number.
• [PRODUCTIVITY]: 100 - Every AC delivered at its achievable evidence ceiling; the deferred AC6 is structurally deferred (image staleness), not author-skipped.
• [IMPACT]: 92 - Wake delivery surviving the restart boundary is the difference between a self-driving swarm and today's manually-woken one; every future MC restart exercises this path.
• [COMPLEXITY]: 55 - One method rewrite plus four tests, but the cross-writer observability semantics and cursor interaction carry real cognitive load for future readers.
• [EFFORT_PROFILE]: Maintenance - Critical-reliability correction with an executable regression guard; small diff, high leverage.

The relay protocol coordinating the team right now depends on exactly the path this PR repairs. Merging it plus the rebuild closes the loop between "wakes proven once" and "wakes survive operations."