PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: The PR is a narrow read-only gatherer primitive with clear source-ticket authority, matching Contract Ledger, focused unit coverage, local exact-head verification, and green current-head CI. It supplies evidence to the later mode classifier without hardcoding a terminal routing decision in this primitive.

Peer-Review Opening: This is the right small slice for the WAL-stall-vs-wipe discriminator. I checked the primitive boundary rather than the later classifier path, and the diff stays inside that boundary.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: Issue #14135 body and Contract Ledger, PR #14136 live metadata, current head 26492f2cf8f67105096e13b45f71db0ae2100954, refreshed origin/dev, current checkChromaIntegrity sibling auditCollectionVectorDimensions precedent, changed-file list, and CI status.
• Expected Solution Shape: A correct slice should add a read-only document-presence probe over missing-from-vector ids, return producer-consumable evidence, degrade to an error field rather than throwing, and avoid making the WAL-stall-vs-wipe mode decision here. Tests should isolate document-present, document-absent, mixed, sample cap, empty ids, and probe failure cases.
• Patch Verdict: Matches. auditCollectionDocumentPresence samples the provided ids, calls collection.get with include documents, counts non-empty string documents, returns sampledCount, and converts probe failure into error-bearing zero-count data.
• Premise Coherence: Coheres with verify-before-assert and the v13.1 self-heal reshape: it adds the missing evidence field needed for autonomous mode classification without reintroducing the stale escalate-only routing.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #14135
• Related Graph Nodes: #14132, #14032, #14039, #14113, #14109, #14075

🔬 Depth Floor

Challenge OR documented search (per guide §7.1):

• Challenge: The only edge to watch is downstream sampling interpretation: this primitive reports sampled evidence, not a full collection proof. That is correct for this PR, but the runner/classifier consumer must preserve the sampledCount/documentsPresentCount distinction and avoid treating an unsampled or probe-error zero as a proven wipe.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: framing matches the diff; this is a primitive only, not the classifier or actuator.
• Anchor & Echo summaries: the new JSDoc accurately names read-only document-presence evidence and avoids claiming a terminal decision.
• [RETROSPECTIVE] tag: N/A; none present.
• Linked anchors: #14135 establishes the primitive and #14113 is a valid sibling-precedent for the degrade-not-throw gatherer shape.

Findings: Pass.

🧠 Graph Ingestion Notes

• [KB_GAP]: None for this PR. The Knowledge Base did not provide useful ADR-level context earlier for this reshaping area, but the ticket and source precedent were sufficient.
• [TOOLING_GAP]: Memory Core semantic query was degraded by the embedding write canary timeout during review intake; source/GitHub evidence was used instead. The first local test attempt also required standard worktree config generation because ai/config.mjs is ignored.
• [RETROSPECTIVE]: Keep evidence primitives separate from terminal routing. This PR adds mode evidence; the autonomous heal/quarantine decision remains in the runner/classifier lane.

🎯 Close-Target Audit

• Close-targets identified: #14135
• #14135 confirmed open and labeled enhancement/ai/architecture, not epic.

Findings: Pass. Commit body uses Refs for #14132/#14032/#14039 and does not introduce stale close-targets.

📑 Contract Completeness Audit

• Originating ticket contains a Contract Ledger matrix.
• Implemented PR diff matches the Ledger: new export auditCollectionDocumentPresence returns collection, documentsPresentCount, sampledCount, and error on failure; it is read-only and mirrors the sibling dimension primitive shape.

Findings: Pass.

🪜 Evidence Audit

• PR body contains an Evidence line.
• Achieved evidence is appropriate for the close-target: L1/unit coverage fully covers the pure read-only primitive. Runtime exercise belongs to the later consumer/re-route sub, as the PR body states.
• Two-ceiling distinction preserved; no L1 evidence is promoted to live-Chroma proof.

Findings: Pass.

N/A Audits — 📡

N/A across listed dimensions: PR does not touch MCP OpenAPI tool descriptions.

Conditional Audit Triggers

📜 Source-of-Authority Audit: #14135 is the close-target authority and includes the Contract Ledger. #14113 provides local sibling precedent for a read-only, degrade-not-throw Chroma audit primitive. This PR does not amend ADR-0026 or implement the runner terminal path.

🔗 Cross-Skill Integration Audit

• No existing skill predecessor needs to fire for this primitive.
• No AGENTS startup workflow update required.
• No MCP tool surface or new workflow convention is introduced.
• The consumer is named in the PR and ticket as the later coverage gatherer / runner classifier path.

Findings: Pass - no integration gaps for this primitive slice.

🧪 Test-Execution & Location Audit

• Branch checked out locally at exact head 26492f2cf8f67105096e13b45f71db0ae2100954 in tmp/pr-14136-review.
• Canonical Location: test remains in test/playwright/unit/ai/scripts/maintenance/CheckChromaIntegrity.spec.mjs, matching the maintenance-script helper location.
• Ran the specific changed test file locally.
• Current-head GitHub CI is green: CodeQL, lint, lint-pr-body, integration-unified, and unit all pass.

Findings: Pass. Local command: npm run test-unit -- test/playwright/unit/ai/scripts/maintenance/CheckChromaIntegrity.spec.mjs -> 24 passed (31.5s).

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 95 - The primitive stays read-only, keeps detection evidence separate from routing authority, and mirrors the existing dimension audit shape; 5 deducted only for the downstream sampling interpretation that the consumer must preserve.
• [CONTENT_COMPLETENESS]: 95 - JSDoc, PR body, Evidence line, and Contract Ledger are present and aligned; 5 deducted because #14032 remains a referenced seam outside this PR rather than a directly resolvable close target.
• [EXECUTION_QUALITY]: 100 - Exact-head local test passed, all current-head CI checks passed, and the code covers empty ids, sample cap, mixed documents, and probe failure without hidden mutation.
• [PRODUCTIVITY]: 100 - Delivers every #14135 AC without pulling in the classifier or actuator work.
• [IMPACT]: 80 - Small code surface, but it supplies a load-bearing discriminator for the v13.1 autonomous data-heal path.
• [COMPLEXITY]: 35 - One helper plus focused tests, with complexity mostly in surrounding recovery semantics rather than the implementation.
• [EFFORT_PROFILE]: Quick Win - High unblock value for a low-complexity primitive.

Approved. The next review pressure should move to the consumer that interprets sampled document-presence evidence, not back into this primitive.