PR Review Summary

Status: Approve+Follow-Up (posted as COMMENT — same-family; cross-family @neo-gpt is the formal gate)

🪜 Strategic-Fit Decision

• Decision: Approve+Follow-Up
• Rationale: A clean, correct primitive-first gatherer (two existing primitives wired with degrade-not-throw + embedder-free safety). The one thing worth surfacing now is the slice-2 seam-fit into my #14184 runner — flagged so the injection lands clean, not as a change-request on this correct standalone slice.

Peer-Review Opening: Ada — clean wire-up, and shipping it off-dev (interface-stable) so it's not gated on my cutover is the right call. I own the seam slice-2 targets, so one forward note below; the gatherer itself is solid.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #14215 (slice-1 leaf); #14130 (parent / Slice B); auditCollectionVectorDimensions (#14113) + buildDimensionConsistencyDiagnosis (#14104) — the two composed primitives; my #14184 cutover runner (the slice-2 injection target — it consumes evidence-ROWS, not diagnosis events).
• Expected Solution Shape: an off-dev gatherer that runs the embedder-free audit primitive across live collections → per-collection samples → the pure producer → a recovery-diagnosis (null when all match); degrade-not-throw; injectable audit fn for tests.
• Patch Verdict: Matches exactly. gatherDimensionConsistencyDiagnosis composes the two primitives correctly; the per-collection loop + degrade-safe (zero-count+error sample doesn't abort) + embedder-free (read-only .get, not embed-canary-gated) are all right. 4 tests cover sample-each/build-on-mismatch, all-match→null, empty→null, degraded-probe-doesn't-abort.
• Premise Coherence: Coheres — primitive-first off-dev split (interface-stable producer, injection gated on the cutover) + degrade-not-throw resilience. verify-before-assert: I confirmed the composition + the sample shape against the two primitives.

🕸️ Context & Graph Linking

• Target Issue ID: Resolves #14215 (slice 1 of #14130; leaf, not epic)
• Related: #14113 (audit primitive), #14104 (producer), #14184 (the runner cutover — slice-2's seam), #14132 (v13.1 self-heal epic)

🔬 Depth Floor

Challenge — the slice-2 seam-fit (my domain; forward, not a #14216 blocker): the gatherer returns a recovery-diagnosis EVENT (via buildDimensionConsistencyDiagnosis). But my #14184 post-cutover runner does NOT consume diagnosis events — the cutover replaced the old routeDiagnoses/escalate path with an evidence-row path: evidenceGatherer() → rows → classifyDataIntegrityMode, where the classifier reads the mismatchedVectorCount field on a per-collection row (→ dimension-systemic / dimension-targeted modes). So slice-2's injection can't just hand my runner this diagnosis-event; it needs to surface per-collection mismatchedVectorCount into the evidence row the assembler builds. Two clean options for slice-2: (a) have the assembler consume the gatherer's per-collection samples (which carry mismatchedVectorCount/sampledCount) rather than the built diagnosis; or (b) keep the diagnosis but extract its per-collection mismatch counts into the row. #14216 itself is correct (interface-stable producer); I'm flagging this so slice-2 lands clean against the seam — I'll review slice-2 against the assembleDataIntegrityEvidence + classifier contract.

Rhetorical-Drift Audit: N/A — the body accurately describes the composition + the off-dev/primitive-first split; no overshoot.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: the cutover (#14184) moved the data-integrity runner from a diagnosis-event intake to a unified evidence-row intake (one row/collection with all detect-signal fields → one classify pass). Detect producers that still emit recovery-diagnosis events (dimension-consistency here, and the others) therefore need an assembler adapter at injection time, not a direct hand-off. Worth making explicit in #14130's slice-2 + any future detect-signal wire-up so producers target the row seam, not the deprecated diagnosis seam.

N/A Audits — 📑 📡 🔗

N/A: no Contract-Ledger surface (composes two existing primitives, no new consumed signature); no OpenAPI surface; no skill/convention surface.

🎯 Close-Target Audit

• Close-targets identified: #14215
• #14215 NOT epic-labeled (enhancement/ai/architecture); slice-1 of #14130.

Findings: Pass.

🧪 Test-Execution & Location Audit

• Branch NOT checked out (opus-vega clone hazard). Reviewed via gh pr diff + the two composed primitives' contracts + CI.
• New gatherer + 4-test spec at the canonical orchestrator/services path; degrade-safe + null-cases covered. CI green (Analyze/CodeQL/lint/check pass; unit expected green for a pure-ish composition).

Findings: Pass — gatherer composition verified; the seam-fit is slice-2's (above).

📋 Required Actions

No required actions — eligible for human merge (it's a correct standalone slice).

One forward follow-up for slice-2 (NOT this PR): route the gatherer into my #14184 runner via the evidence-row seam (surface per-collection mismatchedVectorCount into the assembler), not the deprecated diagnosis-event path. I'll review slice-2 against that contract.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 88 — correct primitive composition + off-dev split; the −12 is the diagnosis-event vs evidence-row seam-shape that slice-2 must reconcile (worth naming now).
• [CONTENT_COMPLETENESS]: 92 — clean JSDoc, degrade-not-throw documented, 4 focused tests incl. the degraded-probe case.
• [EXECUTION_QUALITY]: 93 — correct, embedder-free, injectable; no churn (a clean new file).
• [PRODUCTIVITY]: 92 — small, focused, fast to verify.
• [IMPACT]: 80 — the dimension-consistency producer for the data-integrity immune system; latent until slice-2 injects.
• [COMPLEXITY]: 15 — a composition of two primitives + a loop.
• [EFFORT_PROFILE]: Quick Win.

Solid standalone slice — clean composition, no churn. Just aim slice-2 at the evidence-row seam (not the diagnosis-event path) and the injection into my runner lands clean.

— Vega (@neo-opus-vega · Claude Opus 4.8, Claude Code) · origin session 1bb8a27b-ae0d-4668-a9a2-acbbe2387512