PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: The producer delivers the split evidence-window leaf without pulling the later policy decision into this PR. The exact head preserves the existing guard-ledger contract, records the second filter point into a distinct stream, and is behaviorally green; there is no code-shape, correctness, or safety defect that warrants Request Changes.

Peer-Review Opening: This is the right-sized AC3a increment: one durable producer and query surface, with the disposition decision left on its accumulated-window lane.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: Issue #15076, parent #15057 and its AC3 design comment, consumer #14503, the exact changed-file list, current dev versions of GoldenPathSynthesizer.mjs and routeAttributionLedgerStore.mjs, sibling graph-service placement, ADR 0019, and prior session 01f4cc68-8b8e-43e6-b51c-55b4f421f4e0.
• Expected Solution Shape: A shape-specific sibling JSONL ledger should collect the shared exclusion bucket at the real actionability continue and emit once per synthesis pass. It must not mix the contradiction-guard and type-gate streams, hardcode/re-derive config, or touch production state in tests; isolated temporary directories must prove its I/O.
• Patch Verdict: Matches and slightly improves the expected shape. The exact diff adds a backward-compatible internal filename seam, keeps the new fold in a sibling module, reads resolved AiConfig leaves inline at the synthesis use site, and writes only type-gate-rejection.jsonl; the independent real-loop capture observed precisely the epic and not-code-ready buckets.
• Premise Coherence: Coheres with verify-before-assert and friction→gold: the later keep/narrow/discount decision now receives measured evidence, while the PR refuses to pre-decide policy from the one-shot 42.2% snapshot.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #15076
• Related Graph Nodes: Related: #15057, #14503, #14472, #15068

🔬 Depth Floor

Challenge: The generalized filename seam trusts its caller and does not independently enforce basename/path containment. I searched every exact-head consumer: all non-test uses pass the module-owned TYPE_GATE_REJECTION_FILENAME constant, never config or external input, so this is bounded and nonblocking at the current internal boundary. If that value ever becomes operator- or payload-controlled, containment validation becomes part of that future contract.

Rhetorical-Drift Audit (per guide §7.4):

• PR description matches the exact producer/store/query behavior.
• Anchor & Echo JSDoc distinguishes the contradiction guard from the actionability gate without overstating the disposition as shipped.
• No inflated [RETROSPECTIVE] claim appears in the PR body.
• The cited split-leaf and prior producer anchors establish the described sequence.

Findings: Pass after reviewer polish corrected “no ADR-0019 surface” to the accurate “no new config leaf; existing resolved leaves read inline at the new use site.”

🧠 Graph Ingestion Notes

• [KB_GAP]: None observed; the ticket, current source, ADR 0019, and the predecessor ledger establish the model.
• [TOOLING_GAP]: None observed; exact-head archive setup, structure map, syntax checks, focused units, and the direct integration falsifier all executed.
• [RETROSPECTIVE]: Prior session 01f4cc68-8b8e-43e6-b51c-55b4f421f4e0 correctly separated evidence production from policy disposition. A sibling file preserves that distinction mechanically while reusing only record-shape-agnostic I/O.

N/A Audits — 🪜 📡

N/A across listed dimensions: close-target behavior is an internal graph-service contract fully reachable by unit/file-I/O tests, and the PR changes no MCP/OpenAPI tool surface.

🎯 Close-Target Audit

• Close-targets identified: #15076 only.
• #15076 is open and labeled enhancement, ai, and architecture; it is not an epic.
• Exact commit messages contain no stale Closes / Fixes / Resolves keyword.

Findings: Pass. The parent/disposition lane remains non-closing context.

📑 Contract Completeness Audit

• The originating ticket now contains the reviewer-backfilled Contract Ledger for the filename seam, sibling read/fold/query surface, record schema/producer, and existing AiConfig leaves.
• Exact-head implementation matches every row: default guard filename compatibility, separate type-gate file, fail-open/no-op behavior, internal constant boundary, and inline resolved-leaf reads.

Findings: Pass. The missing metadata was polished directly rather than converted into a code blocker.

🔌 Wire-Format Compatibility Audit

• Existing route-attribution.jsonl remains the default when filename is omitted.
• Read, append, and prune all operate on the same selected filename.
• The new {nodeId, rejectionBucket, stage, at} shape lives in type-gate-rejection.jsonl, so no mixed-stream migration is required.
• Exact existing route-attribution tests and the two-file isolation test pass unchanged.

Findings: Pass; this is additive wire separation with default compatibility.

🔗 Cross-Skill Integration Audit

• No workflow skill, startup convention, MCP tool, or OpenAPI surface is introduced.
• The future disposition consumer is explicitly retained on #15057 / #14503 rather than silently bundled here.
• ADR 0019 was re-audited at the new consumption site; no alias, pass-along config object, hidden fallback, defensive read, or runtime mutation was added.

Findings: All checks pass — no integration gaps.

🧪 Test-Execution & Location Audit

• Exact head 0e3a0596af49a59019d417e0ed114903de861f6e was fetched and expanded into an isolated /tmp review tree.
• New tests are canonically placed under test/playwright/unit/ai/services/graph/.
• typeGateRejectionLedgerStore.spec.mjs, routeAttributionLedgerStore.spec.mjs, and GoldenPathSynthesizer.spec.mjs: 76/76 passed.
• Reviewer-only real-loop capture on the existing non-actionable-candidate journey: 1/1 passed, observing the exact two buckets, synthesis clock, and resolved directory.
• node --check passed for all three touched runtime modules; git diff --check passed; structure map confirms sibling placement in ai/services/graph.
• Current-head hosted lint, unit, integration, JSDoc, CodeQL, archaeology, and retired-primitive checks are green.

Findings: Tests pass; location and exact-head execution are correct.

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 98 - The sibling ledger keeps filter semantics and record shapes separate while reusing only generic edge I/O; two points remain for the intentionally trusted internal filename boundary.
• [CONTENT_COMPLETENESS]: 100 - New/modified methods carry detailed Anchor & Echo JSDoc, and reviewer polish completed the Contract Ledger plus ADR-0019 wording.
• [EXECUTION_QUALITY]: 98 - All related suites, syntax checks, CI, separation probes, and the direct scoring-loop capture pass; two points reflect that the permanent suite pins the helper/store more strongly than the call-through itself.
• [PRODUCTIVITY]: 100 - All four leaf ACs are delivered while AC3b remains honestly outside the close target.
• [IMPACT]: 78 - This turns the actionability gate from a one-shot measurement into a durable decision input for GP-v2, but does not itself choose policy.
• [COMPLEXITY]: 68 - Five files span persistent I/O, a scoring-loop producer, schema-specific folds, retention compatibility, and hermetic tests.
• [EFFORT_PROFILE]: Heavy Lift - Medium-high complexity across a persistent evidence path with release-planning impact.

The exact head is cross-family approved and ready for the human merge gate.