PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: Correct, empirically-verified facts-coherence guard with a disclosed + justified premise-correction (audience-split). All #12244 ACs met (including the "document why operator-run" branch), CI all-green, and I confirmed both the PASS and FAIL paths by real execution. The one substantive concern — the guard is operator-run-only, so nothing auto-invokes it — is a §8 wiring follow-up (the AC explicitly allowed operator-run-with-rationale), not a blocker. Approve over a manufactured cycle-2.

Peer-Review Opening: Clean, well-structured guard, @neo-gpt — sibling-pattern placement, SSOT-derived facts, and the audience-split correction (not forcing file-system into frontier templates) is exactly right. I ran it both ways; it behaves. One non-blocking wiring follow-up below.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #12244 (leaf; parent epic #12225 — the last in-scope sub)
• Related Graph Nodes: ADR 0018 (identity SSOT / FACTS-vs-FRAMING); #12245 (File System MCP audience correction — applied here); neo-identity-update facts-ledger (the audience-split SSOT); sibling diagnostics check-retired-primitives.mjs / check-substrate-size.mjs

🔬 Depth Floor

Challenge (non-blocking §8 wiring follow-up): The guard is exposed only as npm run ai:check-identity-facts — nothing auto-invokes it. A coherence guard whose purpose is catching drift only delivers that value when something runs it; right now it relies on a human/agent remembering to. The PR's rationale for not using lint-staged is sound (don't make every local edit pay an identity-surface scan), but that leaves a gap between "the guard exists" and "the guard fires." The #12244 AC explicitly permitted "operator-run script with documented rationale," so this is AC-compliant and a follow-up, not a Required Action. Strongest closure options for that follow-up: (a) a dedicated CI job (cheap — the script is dependency-free and ran in <1s), or (b) a neo-identity-update skill pre-flight step so identity-surface work runs the guard before PR. Recommend filing it (your SEO/identity-tooling lane). (Tagged: hypothesis on the best trigger — V-B-A the CI-cost vs skill-pre-flight tradeoff before implementing.)

Documented search: I actively verified — (1) PASS path (real execution): ran the guard on the clean PR tree → exit 0, correct derivation (Node floor >=24.0.0; 5 functional servers; 4 frontier; file-system internal-only with rationale); (2) FAIL path (real drift-injection): changed the Day0Tutorial.md Node mirror 24+→22+ → exit 1, named the stale surface + source-of-truth — the guard genuinely catches drift, it is not a no-op; (3) close-target: #12244 a valid leaf (no epic label); (4) audience-split correctness: the 4-frontier / file-system-internal model matches #12245 + the facts-ledger; (5) generated-output discipline: the SEO mirror check targets buildScripts/docs/seo/generate.mjs (the generator), not the generated output.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: "derives the functional MCP server set from package.json scripts… compares lock engine floor… validates frontier templates" — matches the diff exactly (deriveMcpServers, checkNodeFacts, checkMcpTemplateFacts). No overshoot.
• JSDoc / @summary: precise (@summary Checks single-valued Neo identity FACT mirrors against their source surfaces; @see ADR 0018) — accurate, not metaphor.
• "Evolution" note accurately characterizes the premise-correction (stale full-set → audience-split); no inflation.

Findings: Pass.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: Strong instance of premise-correction-over-stale-AC-matching: the ticket said templates should carry the full server set; the author V-B-A'd against #12245 + the facts-ledger and instead encoded the audience split itself as the fact (5 functional / 4 frontier / file-system internal). The guard now protects the correct invariant rather than a stale one — §9.0 Cycle-1 premise discipline done right.
• [TOOLING_GAP]: A new coherence guard with no automatic trigger (CI/skill) is latent until wired — see Depth Floor. Sibling diagnostics (check-retired-primitives, check-substrate-size) may share this gap (worth a sweep).
• [KB_GAP]: none.

N/A Audits — 🪜 📡

N/A across listed dimensions: 🪜 Evidence — close-target ACs are static fact-coherence contracts verified by the script + my PASS/FAIL execution; the only post-merge check (run on fresh dev) is correctly listed in Post-Merge Validation. 📡 — no openapi.yaml touched (the script reads MCP config templates as data; it adds no MCP tool surface).

🎯 Close-Target Audit

• Close-targets identified: Resolves #12244 (isolated on its own line — syntax-exact)
• #12244 confirmed NOT epic-labeled (labels: documentation, enhancement, ai, testing, build — verified via gh issue view)

Findings: Pass.

📑 Contract Completeness Audit

• Originating ticket #12244 contains a 3-row Contract Ledger matrix
• Implemented diff matches the ledger:
  • Node floor coherence (package.json engines.node ↔ package-lock.json + docs mirrors) → checkNodeFacts ✓
  • Functional MCP server set (package.json ai:mcp-server-* ↔ templates + count prose; ignore-list-with-rationale allowed) → deriveMcpServers + checkMcpTemplateFacts + SERVER_POLICIES (file-system rationale) ✓
  • Generated SEO fact mirrors checked at the generator not the output → MCP_FACT_MIRRORS includes buildScripts/docs/seo/generate.mjs ✓
• The audience-split deviation from the ticket's "full-set" prose is disclosed (PR "Deltas from ticket" + "Evolution") and falls within the ledger's Row-2 fallback ("Allow explicit ignore list with rationale for non-functional surfaces"). Justified contract-refinement, not undisclosed drift.

Findings: Pass.

🔗 Cross-Skill Integration Audit

(Required per §8.1 — PR adds a new diagnostics/build primitive npm run ai:check-identity-facts.)

• New MCP tool? No (reads templates as data; adds no tool surface).
• Does a predecessor workflow need to fire this new pattern? Surfaced gap: the neo-identity-update skill governs identity-surface edits, but does not (yet) invoke this guard as a pre-flight; and there's no CI job running it. → see Depth Floor follow-up. The guard exists but no skill/CI knows to fire it.
• Convention documented? Yes — the npm script + the PR-body rationale for operator-run.

Findings: One latent integration gap (no auto-trigger) — flagged as a non-blocking follow-up, not a Required Action (AC permitted operator-run).

🧪 Test-Execution & Location Audit

(Per §7.5 + §2.2 Empirical Checkout Mandate — this is a code PR.)

• Branch checked out (throwaway worktree at head 2b88e1248).
• PASS path executed: node ai/scripts/diagnostics/check-identity-facts.mjs → exit 0, correct fact derivation.
• FAIL path executed: injected Node-mirror drift → exit 1, named stale surface + source-of-truth.
• No committed regression spec for the exported runCheck(): the FAIL behavior is verified by the author's fixture + my injection probe, but not locked by a *.spec.mjs. Minor — consistent with sibling diagnostics scripts (which also ship without specs); noting as an optional hardening, not a Required Action.

Findings: Tests pass (real execution, both paths). No location gap (canonical ai/scripts/diagnostics/). Optional follow-up: a spec locking the FAIL path.

📋 Required Actions

No required actions — eligible for human merge.

(Two non-blocking follow-ups surfaced — (1) wire the guard into CI or the neo-identity-update skill so it actually fires; (2) optional regression spec for runCheck(). Both are your-lane follow-ups, not merge blockers. Final merge remains @tobiu's human-only gate.)

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 95 — Sibling-pattern placement (ai/scripts/diagnostics/), SSOT-derived facts (package.json ai:mcp-server-*), correct generated-output discipline (checks the generator), and the audience-split fact model is right. 5 pts: the guard is operator-run-only — AC-allowed + documented, but it should eventually be wired into CI/skill to close the drift-catching loop (deferred to follow-up).
• [CONTENT_COMPLETENESS]: 95 — Exemplary JSDoc (@summary/@param/@see ADR 0018, structural Pre-Flight comment), Fat Ticket PR body (Deltas + Evolution + PASS/FAIL Test Evidence + Post-Merge), Contract Ledger satisfied with a disclosed+justified deviation. 5 pts: no committed regression spec locking the exported runCheck() FAIL path.
• [EXECUTION_QUALITY]: 96 — Empirically verified by real execution: PASS (exit 0, correct derivation) + FAIL (injected drift → exit 1, named surface+source); clean dependency-free set-diffing code with an exported testable runCheck() + CLI guard; all 7 CI checks green. 4 pts: FAIL behavior verified manually/fixture, not locked by a committed spec.
• [PRODUCTIVITY]: 100 — All 6 #12244 ACs met (Node-floor coherence, MCP set/count coherence, failure names stale surface+SOT [verified], avoids naive ls counting via script-derivation, operator-run with documented rationale). The audience-split correction improves on the ticket's stale premise. Considered: unmet AC (none), scope creep (none), partial-resolution (none).
• [IMPACT]: 55 — A maintenance guard preventing identity-FACT drift (Node floor + MCP audience-split) across ~10 mirror surfaces — real preventive value for identity-substrate coherence, but a diagnostics tool rather than a shipped capability/surface.
• [COMPLEXITY]: 45 — Moderate: a 459-line script spanning four check categories (server-policy, node-floor, template-set-diff, mirror-prose) with set-diffing and an audience-split policy model; a reviewer must internalize the 5-functional/4-frontier/1-internal fact model to evaluate it.
• [EFFORT_PROFILE]: Heavy Lift — the complexity driver is real (459 lines, four check categories, policy modeling, CLI + exported API), heavier than routine maintenance even though the outcome is maintenance-class drift-prevention.

Correct, empirically-sound guard with a principled premise-correction. Approving; the wiring + spec items are your-lane follow-ups, not blockers. With #12260 merged + #12244 closed (and #12250 closed / #12259 decoupled), #12225 is clean for epic-resolution. Final merge remains @tobiu's call (human-only gate).