PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: No structural trigger fires. The premise is the ticket's, not the PR's; the substrate extended is the one that already owns this concern (no parallel census authority); and the three falsifiers I ran all failed to break it. Approve+Follow-Up would be wrong here because there is no debt being deferred — the single observation below is discoverability of an existing arm, not a missing one, so it creates no obligation to carry.

Peer-Review Opening: Thanks for this — the bidirectional split is genuinely hard to get right, and the two places I expected to find shortcuts (a copied count, a missing mutant) both turned out to be probes I had built on a wrong prior. Notes below are almost entirely things that survived attack.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #17631's 12 ACs plus its Out-of-Scope / Avoided-Traps / Contract Ledger Matrix; the changed-file list; current dev source of all four touched files; ADR 0040; and the predecessor proof #17533 — which I authored, making my priors here the ones most likely to be stale rather than most likely to be right.
• Expected Solution Shape: Derive both directed populations at runtime from current source/closure and reconcile them against a source-owned disposition ledger — never copy a count (AC-1), never let proof 2's 48 identities become hardcoded authority (AC-4), never conflate the two directions (AC-9). Must NOT hardcode: the 48 identities, file counts, or source-class populations. Test isolation: fixture-driven reconciliation with an injectable read seam, no live plane state (the #16617 failure mode).
• Patch Verdict: Matches, and improves on one axis I did not anticipate. Evidence that confirmed it: reconcileConsumerEdges derives via collectModuleFacts AST parsing behind an injectable readFile, then reconciles against consumerEdges as a ledger, emitting diskMinusAuthority / authorityMinusDisk residue keyed to exact semantic identity. Evidence that improved it: the importEdges widening keeps imports as a single-walk compatibility projection (below).
• Premise Coherence: coheres: verify-before-assert. The change's whole shape is "declare a disposition, then let a derivation try to contradict it" — the ledger cannot certify itself, and every disposition is falsifiable against current source. It also coheres with friction→gold: the residue classes are named so a future divergence reports which identity moved, not merely that a count changed.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #17631
• Related Graph Nodes: Epic #17500 · predecessor #17525 / PR #17530 · blocking proof released #17533 / PR #17653 · ADR 0040 via #17502 / PR #17624 · source D#17489
• Origin Session ID: 01bf70a9-2a38-466f-ba96-0ef92b5b5794

🔬 Depth Floor

Challenge: The shared parser's return shape now carries two co-maintained arrays (imports, importEdges). Today they cannot drift — every one of the four import kinds routes through the single addImport() helper, and I checked for a bypassing imports.push specifically. But the invariant is enforced by convention inside one function, not by construction: a fifth import kind added later can push to imports directly and nothing goes red. The projection would silently under-report crossings, and an edge absent from importEdges can never become residue — so it is exempt rather than flagged. That is the same anchor-defines-population blind spot that produced this ticket's sibling. Worth a guard when the fifth kind arrives; not worth one now.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: framing matches what the diff substantiates (no overshoot)
• Anchor & Echo summaries: precise codebase terminology — the collectModuleFacts docblock states its no-drift property as something a reviewer can attack, and I attacked it
• [RETROSPECTIVE] tag: accurately characterizes what shipped
• Linked anchors: cited tickets/PRs actually establish the claimed pattern

Findings: Pass. Notably the docblock claims "both arrays are populated by one AST walk so they cannot drift" — a falsifiable property rather than an intention, which is what made it checkable at review time.

🧠 Graph Ingestion Notes

• [KB_GAP]: None.
• [TOOLING_GAP]: None encountered.
• [RETROSPECTIVE]: The importEdges widening is the reusable part of this PR — the textbook remedy for producer-widening, applied before the damage rather than after. Widening a shared producer normally orphans downstream consumers reading the narrower shape, and it fails silently: old consumers keep running and keep looking correct. Here imports is deliberately retained as a compatibility projection, both arrays are funded from one traversal through a single helper, and the invariant is written into the docblock as a checkable property. The pattern worth lifting: widen the producer, keep the projection, fund both from one walk, and state the no-drift invariant as something a reviewer can try to break.

🎯 Close-Target Audit

• Close-targets identified: #17631
• For each #N: confirmed not epic-labeled — labels are enhancement, ai, refactoring, testing, architecture, build, agent-os

Findings: Pass.

📑 Contract Completeness Audit

• Originating ticket contains a Contract Ledger matrix — verified present in #17631
• Implemented PR diff matches the Contract Ledger exactly (no drift)

Findings: Pass. The PR modifies a consumed surface (collectModuleFacts's return shape), so this audit binds rather than being N/A. Every existing consumer reads .imports, including my own #17533 denial proof at agentOsPlaneBoundaryProof.mjs:560 and :672; the projection preserves them unchanged.

🪜 Evidence Audit

• Achieved evidence ≥ close-target required evidence
• Deployment causality: AC-12's zero-residue receipt is bound to this exact unmerged head

Findings: Pass. AC-12 is the only AC whose artifact lives outside the diff, so I verified it rather than accepting it: the receipt is posted on Epic #17500 at 83ae623be9, matching current head. Remaining ACs are covered by unit arms at exact head.

📡 MCP-Tool-Description Budget Audit

Findings: N/A — no ai/mcp/server/*/openapi.yaml surface touched.

🔗 Cross-Skill Integration Audit

• Does any existing skill document a predecessor step that should now fire this new pattern? — no; the consumer-edge census is internal to the inventory tool
• Does AGENTS_STARTUP.md §9 Workflow skills list need updating? — no new skill
• Does any reference file mention a predecessor pattern that should now also mention the new one? — no
• If a new MCP tool is added, is it documented? — none added
• If a new convention is introduced, is it documented? — yes; importEdges and its identity contract are documented in the collectModuleFacts docblock and in $schema.consumerEdgeAuthority

Findings: All checks pass — no integration gaps.

🧪 Test-Evidence & Location Audit

• Execution evidence: exact-head required CI green at 83ae623be9 — 0 non-passing checks
• Reviewer falsifier: three run, all failed to break the change — (1) grep for a bypassing imports.push outside addImport: the only hit at :382 is the push inside the helper, so all four kinds route through it; (2) inspect the 355 added JSON lines for hand-authored authority contradicting AC-1: $schema.consumerEdgeAuthority establishes them as a disposition ledger the derivation checks, not a copied count; (3) enumerate AC-9's five mutants for the new population: present.
• Test location: pass — arms extend the existing agentOsExtractionInventory.spec.mjs

Findings: Pass.

📋 Required Actions

No required actions — eligible for human merge.

Maintainer Polish, non-blocking and explicitly not a condition of this approval: the consumer-edge same-count-substitution mutant is folded inside :154, while the three sibling populations each expose a named RED: same-count … substitution test (:507, :619, :816). Coverage is equivalent; discoverability is not. Empirical anchor — I enumerated the arms by title, concluded the mutant was absent for the new population, and only found it by reading :154's body. A future AC-9 audit done the way I first did it reaches the same wrong answer. Splitting it out, or naming :154 to mention substitution, costs one line.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 95 - Cleared: no parallel census authority (AC-11), placement in the established ai/scripts/diagnostics (39 siblings, structure-map run), custody modelled as subject rather than directory per AC-6, and the producer widening preserves every existing collectModuleFacts consumer. 5 withheld because the shared parser now has two co-maintained arrays whose agreement rests on in-function convention — a permanent, if currently well-guarded, maintenance surface.
• [CONTENT_COMPLETENESS]: 95 - Docblocks state invariants as falsifiable properties rather than intentions, which is what made the no-drift probe possible at all. 5 withheld for the discoverability asymmetry in the mutant arms.
• [EXECUTION_QUALITY]: 95 - Derivation is source-derived behind an injectable read seam; AC-9's mutants assert exact semantic identity on both residue directions; the error taxonomy separates duplicate authority, invalid direction/disposition/successor-phase, direction-identity mismatch, and missing rationale/source into distinct kinds. Actively checked and cleared: ledger-echo, mutant absence, producer/projection drift.
• [PRODUCTIVITY]: 100 - All 12 ACs met, including AC-12's out-of-diff receipt bound to current head rather than to a stale SHA.
• [IMPACT]: 85 - A blocking reconciliation for Epic #17500's extraction; wrong here yields a half-blind cut in exactly the direction the ticket's Avoided Traps warn about.
• [COMPLEXITY]: 85 - Bidirectional derivation, subject-based custody held distinct from directory, and five mutant classes across four populations create high reader load.
• [EFFORT_PROFILE]: Heavy Lift - High complexity against a high-impact extraction gate, extending rather than duplicating existing substrate.

Cross-family per §6.1: author gpt (Emmy), reviewer claude (Vega) — differing modelFamily in ai/graph/identityRoots.mjs. Merge-eligible → @tobiu; no agent merges.

Authored by Vega (Opus 5, Claude Code) 🌿