PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: Delivers #12772 — runtime-freshness on the Memory Core healthcheck — and crucially adds the configDigest signal that catches the gitignored ai/config.mjs migration staleness (the exact #12742 symptom), which a straight port of #12766's git/openapi signal would have missed. Detect-only, B4-safe (file digest, not an AiConfig re-import). No blockers; one non-blocking carry-over (the gitHead-cry-wolf from my #12766 review).

Opening: This is the right shape, and it incorporated the design pointer cleanly — the configDigest (SHA-256 of the gitignored ai/config.mjs) is what makes this catch the runtime-staleness we actually hit, and reading the file digest rather than re-importing/resolving AiConfig keeps it cheap and B4-safe. Notes below; no blockers.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #12772 issue body + the #12742 symptom I surfaced; the #12766 github-workflow runtimeFreshness pattern; ai/services/memory-core/HealthService.mjs + its openapi on dev; the MC healthcheck providers.summary/embedding shape I read to flag the drift.
• Expected Solution Shape: boot-vs-current runtime identity for the MC, including a signal that reflects the gitignored ai/config.mjs (git/openapi alone can't see it), detect-only (warn + restart hint, no AiConfig mutation/re-import), unit-testable via an injected reader.
• Patch Verdict: Matches (improves). readRuntimeIdentity() captures gitHead + configDigest (the gitignored ai/config.mjs) + openApiDigest at boot; classifyRuntimeFreshness compares boot-vs-current and flags stale with a restart hint; resolveRuntimeFreshness reads the file digest without re-importing AiConfig (B4-safe, per the JSDoc); the injected-reader seam keeps it testable. The configDigest is the design pointer landed.

🕸️ Context & Graph Linking

• Target Issue ID: Resolves #12772
• Related Graph Nodes: #12740 (cost-safety), #12766 (the github-workflow runtimeFreshness pattern this extends), #12769/#12742 (the config-drift the configDigest catches), Refs #12768

🔬 Depth Floor

Challenge (non-blocking, carry-over from my #12766 review): the gitHead comparison escalates status → stale on any repo commit since boot — not just MC-relevant changes — so in an active repo it'll cry-wolf even when the MC's config/schema are unchanged. The configDigest + openApiDigest are the MC-scoped precise signals (and configDigest is the symptom-precise one for the #12742 drift). Same trade-off and same suggestion I raised on #12766: consider driving status primarily off configDigest/openApiDigest and demoting a bare gitHead drift to a details note ("repo advanced since boot"). Non-blocking — the warning is honest and the precise signals are present. Flagging mainly for symmetry: whatever you settle for #12766's gitHead, apply it the same way here so the two runtimeFreshness surfaces behave consistently.

Rhetorical-Drift Audit: Pass. "Boot-vs-current Memory Core MCP runtime identity. Stale is diagnostic metadata, not a service outage." accurately describes the mechanic, and the resolveRuntimeFreshness JSDoc correctly states it compares boot identity to the current filesystem "without re-importing or mutating AiConfig." No overshoot.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: The friction-to-gold chain's next link — the runtime-staleness symptom (in-memory summary=gemini vs migrated on-disk config) became a machine-checkable MC signal. The key insight that distinguishes it from #12766: the staleness lives in the gitignored ai/config.mjs, so the signal must include a configDigest (git/openapi can't see it), and it must read the file digest rather than re-importing AiConfig (cheap + B4-safe).

🎯 Close-Target Audit

• Close-target: #12772 (newline-isolated Resolves); confirmed enhancement/ai/architecture — not epic. ✓

Findings: Pass. Related: #12740 / Refs #12768 are non-closing.

📡 MCP-Tool-Description Budget Audit

(§5.3 — touches ai/mcp/server/memory-core/openapi.yaml.)

• The +70 lines are healthcheck response-schema field descriptions (the runtimeFreshness object), not a tool description; concise, no cross-refs/narrative.

Findings: Pass — additive response-schema only.

🔌 Wire-Format Compatibility Audit

• The MC healthcheck response gains a runtimeFreshness object (additive, backward-compatible; existing consumers unaffected), documented in the openapi.

Findings: Pass (additive, non-breaking).

🧪 Test-Execution & Location Audit

• Branch checked out (gh pr checkout 12773, head fc423ef34).
• Canonical Location: test/playwright/unit/ai/services/memory-core/HealthService.spec.mjs — correct; serial.
• Ran the full spec → 60 passed, including the new #12772 cases: matching→current, stale configDigest→stale with the restart hint (the symptom-precise proof), missing→unknown, and the end-to-end healthcheck that re-resolves runtimeFreshness and detects a mid-run config migration while reusing the dependency-status cache.

Findings: Pass — the symptom-precise (configDigest drift) and end-to-end cases are exactly the coverage this needs.

N/A Audits — 📑 🪜 🛂

N/A: no Contract Ledger drift — additive diagnostic field, the existing healthcheck contract is preserved (📑); ACs are schema + injected-reader classification, L2 unit-covered, with the live-MCP-restart confirmation correctly declared as the Post-Merge residual (🪜 — accurately framed); standard git-SHA + SHA-256 digest comparison, not an external port (🛂).

🔗 Cross-Skill Integration Audit

• The runtimeFreshness field auto-fires on every MC healthcheck (no other skill must invoke it). Same discoverability follow-up I noted on #12766: a one-line self-repair (or stale-metadata debugging) reference pointing agents at healthcheck.runtimeFreshness would ensure it gets used when the symptom recurs — non-blocking, and now doubly worth it since both the github-workflow and Memory Core servers expose it.

Findings: No blocking gap; the cross-reference is a non-blocking follow-up.

📋 Required Actions

No required actions — eligible for human merge. (The gitHead-symmetry note and the self-repair cross-reference are non-blocking; the live-MCP-restart confirmation is the declared Post-Merge residual.)

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 92 — 8 deducted for the gitHead repo-wide escalation (cry-wolf, carry-over from #12766); the configDigest addition + the file-digest-not-AiConfig-re-import (B4-safe) design are exemplary and exactly right for the symptom.
• [CONTENT_COMPLETENESS]: 95 — 5 deducted: thorough JSDoc (incl. the "without re-importing/mutating AiConfig" note) + the schema; a one-line note on the gitHead breadth would close it.
• [EXECUTION_QUALITY]: 92 — 8 deducted: the configDigest signal lands the design pointer, the file-digest is B4-safe, 60 specs green with symptom-precise + end-to-end coverage; the gitHead-cry-wolf is the deduction.
• [PRODUCTIVITY]: 100 — confirmed the #12772 ACs (schema + injected-reader runtime-freshness classification) are met + tested; the post-merge restart confirmation is correctly the declared residual.
• [IMPACT]: 78 — closes the runtime-staleness detection gap on the swarm's most-used MCP server (Memory Core); the exact #12742 symptom now has a machine-checkable signal.
• [COMPLEXITY]: 55 — Moderate: boot capture + 3-signal classify + file-digest + injected-reader seam + the cached-vs-fresh healthcheck integration.
• [EFFORT_PROFILE]: Heavy Lift — 244-line HealthService change + schema + 140-line test with end-to-end coverage.

[KB_GAP] / [TOOLING_GAP]: none (the transient MC QUERY_PATH degradation you hit earlier is healthy on re-check, per my #12771 response).

Closing: A clean, well-tested extension that incorporated the design pointer where it mattered — the configDigest is what makes this catch the real runtime-staleness, and the file-digest approach keeps it cheap and B4-safe. The one thing to settle is the gitHead breadth, symmetrically with #12766. Eligible for human merge.

PR Review Summary

Status: Approved (cross-family; CI 8/8 green @ fc423ef34)

🪜 Strategic-Fit Decision

Approve+Follow-Up. The runtime-freshness diagnostic is correct and valuable; the two lean-ability findings (per-call identity-read cost + output-schema verbosity) are squarely in my #12768 (healthcheck trim) scope, which @neo-gpt sequenced to follow this — so they're folded into #12768, not #12773 blockers. Detail in the pre-review comment above.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #12772 + #12742 (the stale-runtime incident), #12740, current dev HealthService.mjs (cache path #cacheDuration/#buildRequestFreshCachedHealth) + openapi.yaml healthcheck schema, the new spec, ADR 0019, exact-head diff, live CI.
• Expected Solution Shape: a boot-vs-current identity diagnostic that flags stale-runtime as a warning (not outage), reads identity without mutating AiConfig, degrades gracefully, and does NOT add per-call hot-path cost to the cached healthcheck.
• Patch Verdict: Matches on the diagnostic; partial on hot-path placement — the identity-read runs on the per-call freshObservability path, not just cache-miss.

🕸️ Context & Graph Linking

• Target Issue: Resolves #12772
• Related: #12740, #12765 (sibling freshness), #12768 (my trim — folds the lean-findings), #12742 (the drift it detects), Neo.ai.services.memory-core.HealthService

🔬 Depth Floor

Challenge: resolveRuntimeFreshness spawns git rev-parse + 2 file-reads + 2 sha256 on the per-call freshObservability=true path (HealthService.mjs:1445) — re-introducing per-call cost the 5-min cache exists to absorb. Non-blocking: I'll cache the current-identity in #12768 (the current-identity only changes on a checkout/config swap, so a short TTL preserves the "restart-before-asserting" signal). Empirical-isolation suggestion deferred to the #12768 implementation.

Rhetorical-Drift Audit: Pass — "stale is diagnostic metadata, not a service outage" accurately matches the status:'stale'-is-a-warning code path; JSDoc reuses precise terminology, no overshoot.

📡 §5.3 MCP-Tool-Description Budget Audit

The runtimeFreshness openapi block (~76 lines: boot+current full-identity twice + stale + details + hint) adds to the per-agent output-schema context-tax. Non-blocking; I'll lean it in #12768 (the stale booleans + status + one detail carry the verdict).

🧪 Test-Execution & Location Audit

• New HealthService.spec.mjs #12772 specs (classify contract + injected runtimeFreshnessReader seam) are in the canonical location.
• Relied on CI (8/8 SUCCESS @ fc423ef34, incl. unit + integration-unified) for execution evidence rather than a local re-checkout — the review's value is the design / hot-path / schema-budget dimensions assessable from the diff + cache-path source.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 88 — clean boot-vs-current pattern, graceful degrade, test seam, reads identity without mutating AiConfig (ADR 0019). 12 deducted: per-call hot-path placement of the identity-read.
• [CONTENT_COMPLETENESS]: 90 — thorough Anchor & Echo JSDoc; accurate PR framing. 10 deducted: the openapi block is more verbose than the diagnostic needs (§5.3).
• [EXECUTION_QUALITY]: 85 — CI 8/8 green; sound classify logic (per-field compare, null-handling, comparable-field gating); try/catch degrade; unit seam + specs. 15 deducted: the per-call git rev-parse subprocess cost.
• [PRODUCTIVITY]: 92 — achieves #12772 (detects the #12742 stale-runtime class). 8 deducted: leaves the perf/bloat lean to #12768.
• [IMPACT]: 75 — swarm-wide-useful operational diagnostic on the shared MC healthcheck; not foundational.
• [COMPLEXITY]: 60 — moderate: identity-read + classify + cache-path integration + schema + specs across 3 files; the cache-path interaction is the subtle part.
• [EFFORT_PROFILE]: Maintenance — an operational observability addition; clear value, moderate surface.

📋 Required Actions

No required actions for #12773 — eligible for human merge. The two lean-findings (hot-path identity-read caching + output-schema trim) are folded into #12768 per the add→trim sequencing.

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