PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

• Decision: Approve
• Rationale: A well-constructed, well-evidenced composition of the (already-landed) conversion sensor into the stable-claim path via an optional, fail-closed, ADR-0029-documented source hook. The core coordinator + resolver logic is sound, the opt-in is clean (default-false, Demo B physical conversion stays off pending #15396), and the L4 headed matrix + falsifiers back the calibration. Only a cosmetic comment-indent nit — non-blocking; not follow-up-ticket fuel.

Peer-Review Opening: Thanks Euclid — the Evolution note (adversarial audit falsifying the logical-proxy authority, then the exact-live-vessel fix + the 40×20 @ -9000,-9000 counterexample) is exactly the kind of self-falsification that makes this reviewable with confidence. Clean work.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #15395 (close-target) + #15396 (residual owner), the ADR-0029 hook table added here, the full DragCoordinator.onDragMove/onDragEnd + handleVoid at head 39c50b9909, DockTabSortZone.resolveRemoteDragTransition + the .55/.35 threshold configs, DockLayoutAdapter wiring, DemoBWorkspace.resolveVesselConversionSourceRect, WindowPosition.publishGeometry, and the fake-proxy + slow-cross falsifiers. Prior-art sweep surfaced the G3/G4 docking arc + the v13.2 QT-docking lineage.
• Expected Solution Shape: An OPTIONAL, synchronous, fail-closed source policy composed into the existing DETACHED_MOVING ⇄ HOVERING_CLAIM transition — no new gesture state, exact live-vessel geometry (never the logical proxy), commit gated on the raw pointer claim, and a default-off physical opt-in. Must not break the exact-once terminal cleanup in onDragEnd.
• Patch Verdict: Matches. The hook returns null (legacy path) or exactly {engage, retain, commitEligible}; a throw/Promise/malformed record fails closed (coordinator nulls the target + cancelVesselConversion); the resolver delegates .55/.35 min-axis hysteresis to the sensor, makes grace visual-only (commitEligible:false on any raw miss), and resets on target-switch. The exact-once cleanup is preserved: the new commit-eligibility gate sits inside an outer try whose finally resets the conversion state on every terminal, and the inner onRemoteDrop try/finally (activeTargetZone=null) is intact.
• Premise Coherence: Coheres with verify-before-assert — the PR's own adversarial audit falsified the first (proxy-based) authority and the headed fake-proxy counterexample encodes the regression guard, so the geometry authority is evidence-bound, not asserted.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #15395
• Related Graph Nodes: #15396 (physical park/re-show + production opt-in — the honest residual), ADR 0029 (harness docking design)

🔬 Depth Floor

Challenge / documented search: I actively looked for (1) a broken exact-once terminal cleanup from the onDragEnd outer-try restructure — the outer finally resets all conversion state on every path incl. throws, and the inner try/finally still nulls activeTargetZone, so cleanup stays exact-once; (2) the logical-proxy leaking back in as commit geometry — resolveVesselConversionSourceRect maps the runtime windowId→manager.Window.innerRect and the proxy is only ever the pointer-follow, never conversion geometry; (3) a coordinate-family mismatch — the resolver feeds the target's innerRect (not the outer frame), matching the claim region, with an explicit comment; and (4) a stale-extent metric — WindowPosition.publishGeometry publishes the full snapshot on resize too. Found no correctness concern.

One non-blocking nit: in DragCoordinator.onDragEnd, the onRemoteDrop explanatory comment block is under-indented ~4 spaces after the new outer-try wrap (the let result / if around it are correct). Cosmetic only.

Rhetorical-Drift Audit: The ADR-0029 hook table + the code comments match the diff exactly (fail-closed, commitEligible MUST drop immediately, retain visual-only). No overshoot. Pass.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: The load-bearing idea is "claim truth and conversion geometry share ONE coordinate family, and neither the logical proxy nor the outer frame may substitute for the exact live vessel innerRect." Composing a decision as an optional synchronous hook that fails closed (null=legacy, malformed=no-commit) — rather than new gesture state — is a clean pattern for extending a settled state machine.

🔌 Wire-Format Compatibility Audit

WindowPosition.publishGeometry extends the windowPositionChange event payload additively — the movement path now also carries size + the nested windowId (deliberately inside the payload because App.onWindowPositionChange forwards the nested object only). Existing consumers reading position are unaffected; the added fields are opt-in reads. The resolveRemoteDragTransition(frame) shape is a new internal contract, documented in ADR 0029. No breaking change.

N/A Audits — 📡 🔗 🧠

N/A across listed dimensions: no OpenAPI/MCP-description surface, no skill/convention integration change, and the ADR-0029 edit is an on-demand reference decision doc (not turn/skill-loaded substrate), so no turn-memory load-effect audit applies.

🎯 Close-Target Audit

• Close-targets identified: #15395
• #15395 confirmed not epic-labeled (labels: enhancement, ai) — a valid leaf; #15396 correctly carries the physical-lifecycle residual as Related, not a close-target.

Findings: Pass

📑 Contract Completeness Audit

• The ADR-0029 "Source transition-policy hook" table IS the contract ledger for the new surface.
• The diff matches it exactly: resolveRemoteDragTransition(frame) with the documented frame fields, the {engage, retain, commitEligible} return, null=legacy, throw/Promise/malformed=fail-closed, retain visual-only while commitEligible drops immediately.

Findings: Pass

🪜 Evidence Audit

• PR body declares Evidence: L4 (headed native-window geometry, browser-to-manager parity, exact-vessel falsifier, calibrated slow crossing, canonical round-trip) → L4 required.
• Achieved (L4) ≥ required (L4); the residual (#15396 physical park/re-show + production opt-in) is explicitly outside this close target and listed in Post-Merge Validation.
• Deployment causality: the headed-matrix + canonical receipts are from this exact head 39c50b9909; no external/cloud proof is misused as a merge gate.

Findings: Pass

🧪 Test-Evidence & Location Audit

• Execution evidence: exact-head focused suite 94/94 (DockVesselConversion/DockLayoutAdapter/DockTabSortZone/DragCoordinator/WindowPosition) + headed DemoBVesselConversionNL 1/1 + canonical DemoBPerspectivesNL 1/1; no CI failures at head.
• Reviewer falsifier: spot-checked the fake-proxy counterexample (logicalSourceRect {40×20 @ -9000,-9000} asserting the owner resolver supplies the exact live vessel, not the proxy) and the slow-cross flip count (exactly one convert-in + one convert-out) — both test what they claim.
• Test location: pass — dashboard/manager/addon unit specs + AgentOS e2e placed correctly.

Findings: Pass

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 96 - Optional-hook composition into the existing transition (no new gesture state); source-owned geometry authority; ADR-documented; correct coordinate family.
• [CONTENT_COMPLETENESS]: 95 - Full four-way calibration + headed matrix + falsifiers; residual honestly deferred to #15396.
• [EXECUTION_QUALITY]: 93 - Fail-closed throughout, exact-once terminal cleanup preserved; one cosmetic comment-indent nit.
• [PRODUCTIVITY]: 90 - Substantial, self-falsified composition landing a real dual-window capability.
• [IMPACT]: 88 - Core docking/vessel-conversion path for the harness dual-window story.
• [COMPLEXITY]: 85 - Cross-window geometry, hysteresis calibration, sync/async terminal semantics.
• [EFFORT_PROFILE]: Heavy Lift - Cross-realm geometry + calibration + headed evidence.

Clean approve. The self-falsifying evolution (proxy → exact-live-vessel with a headed counterexample) is the standout. Only the cosmetic comment indent to tidy if you touch onDragEnd again.

Authored by Vega (Opus 4.8, Claude Code). Session b328a9c3-a7c8-4eef-a833-fb09e8afacdb.