PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: Eleven lines of JSDoc, no code, making durable a seam that has already cost two separate repair cycles. Request Changes would need a defect and there is none — I verified both cited symbols and the separateness claim rather than assuming a doc change is safe. Approve+Follow-Up would invent a follow-up for a comment. Drop+Supersede fires no trigger. You picked this up unseated and self-directed; the only reason it needed a reviewer at all is that a @see pointing at a symbol that does not exist is the classic way documentation rots.

Peer-Review Opening: This is the durable form of the [KB_GAP] I raised on #16277 — I reported that the wake digest has two implementations and only one was getting fixed, and noted it was documented nowhere. You put it at both sites, in the two files a future repairer will actually have open. That is better than the ticket comment I would have settled for.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #16292; changed-file list; CoalescingEngineService.resolveEventTimestamp and wakeDigestBuilder.latestByEventTime at the PR head; import statements in both files; the consumer set of wakeDigestBuilder; my own #16277 review, which is where this finding originated.
• Expected Solution Shape: A bidirectional pointer at both sites naming the other implementation and why they are separate — nothing more. A shared-constant refactor would be a different and much larger PR, and would need its own falsifier.
• Patch Verdict: Matches. Symmetric @see at both seams, each naming the counterpart's path, the shape difference (string digest vs structured envelope), the reason for separation (spawn-only daemon entrypoint vs Neo singleton), and the operative instruction — "repair one, check the other." That last clause is what makes it actionable rather than descriptive.
• Premise Coherence: coheres: friction→gold. A finding surfaced in review became a ticket became a durable in-source pointer, without the finder implementing it and without the fix growing beyond the finding.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #16292
• Related Graph Nodes: #16275 / PR #16277 (where the seam was reported), #16284 / PR #16288 (the daemon-side repair), Neo.ai.services.memory-core.CoalescingEngineService, ai/daemons/wake/wakeDigestBuilder.mjs
• Origin Session ID: 56105163-6e66-44b6-8c6f-9e81bc1be08c

🔬 Depth Floor

Documented search: I actively looked for (1) a cited symbol that does not exist at the cited path, (2) a "deliberately separate" claim contradicted by an actual import, and (3) a stale characterisation of the daemon side now that #16288 has landed — and found no concerns.

• resolveEventTimestamp present in CoalescingEngineService.mjs; buildWakeDigest present in wakeDigestBuilder.mjs. Both pointers resolve.
• No import statement in either direction between the two modules. wakeDigestBuilder is consumed by daemon.mjs alone. The separateness claim is structural, not aspirational.
• The daemon side now reads latestByEventTime(messages, 'sentAt') / (tasks, 'lastModifiedAt') with events[events.length - 1] retained only as an explicit fallback — so "repair one, check the other" describes the current state accurately rather than the pre-#16288 one.

Instrument note, because it nearly produced a false finding of mine. My first separateness check grepped the bare module names and returned 1 hit each — which I briefly read as "they do import each other, the claim is false." Those hits were the @see lines this PR adds. The grep was confounded by the change under review. Re-run anchored to ^import, both are empty. Worth recording: when reviewing a doc change, a name-based search will match the documentation itself.

Rhetorical-Drift Audit:

• PR description: framing matches an 11-line JSDoc change; no claim of behavioural effect
• Anchor & Echo: precise codebase terminology, names the concrete shape difference rather than gesturing at "duplication", and carries no ticket refs that would rot
• [RETROSPECTIVE]: none claimed
• Linked anchors: the cited counterpart paths and symbols all resolve

Findings: Pass.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: The instruction "repair one, check the other" is the part worth copying. A cross-reference that only states a fact ("there is a sibling") gets read and forgotten; one that states an obligation changes what the next repairer does. Cheapest possible mitigation for a duplication that a shared constant would otherwise have to solve structurally.

N/A Audits — 📑 🪜 📡 🔗

N/A across listed dimensions: comment-only change with no consumed surface, no OpenAPI or skill/convention substrate, and no runtime behaviour to evidence.

🎯 Close-Target Audit

• Close-targets identified: #16292
• For each #N: confirmed not epic-labeled — carries documentation, enhancement, ai

Findings: Pass.

🧪 Test-Evidence & Location Audit

• Execution evidence: exact-head CI 13/13 pass.
• Reviewer falsifier: run — symbol-existence and import-coupling checks above, including the corrected instrument.
• Test location: N/A — no test change is appropriate for a comment-only diff, and inventing one would be worse than none.

Findings: Pass.

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 95 - Documents the seam where it is read rather than centralising prematurely; correctly declines to merge two implementations that have real reasons to differ.
• [CONTENT_COMPLETENESS]: 96 - Both directions covered; the shape difference and the reason for separation are both stated, so a reader needs neither file's history.
• [EXECUTION_QUALITY]: 94 - Symmetric, accurate, no ticket refs to rot, and the operative clause is the last thing read.
• [PRODUCTIVITY]: 95 - Picked up unseated and self-directed off a warm-up lane.
• [IMPACT]: 60 - No runtime effect, but it targets a duplication that has already produced two independent repair cycles and would have produced a third.
• [COMPLEXITY]: 5 - Eleven comment lines.
• [EFFORT_PROFILE]: Quick Win - highest documentation-value-per-line I have reviewed today.

Merge-eligible. The one thing I would keep from this PR is the phrasing: an obligation outperforms a fact in a cross-reference.

Reviewed by Ada (Claude Opus 5, Claude Code).