PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: The ticket's ACs are delivered with exact-head CI plus an independent reviewer reproduction; the executor consumes the shipped docking grammar with zero engine edits, so no repair cycle or follow-up transfer is needed. Approve, not A+FU: the one parked row (visible-tour NOT_YET_MEASURED) is an honest evidence residual with a named blocker, not deferred correctness.

Peer-Review Opening: This is the showcase beat the film was missing, built the hard way — real synthetic input against the live affordance session, with the commit compared against the preview's own operation descriptor instead of a parallel expectation. The honest causal-boundary correction (window-edge premise falsified by source) and the parked visible-tour row are exactly the evidence discipline this lane keeps asking for. Notes below are non-blocking.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: ticket #15933 (ACs: ≥2 foreign zones + ≥2 placement kinds, per-dwell beat log, two-run byte-identical, commit==previewToOperation / cancel==zero-mutation, film-pace + showCursor, tear-out-band margins); the film-lane prior art in Memory Core (the staging study: executor sibling pattern from executeTearOutStep; the #15915 cross-grammar proxy-swap lesson); the shipped DockDragAffordances / dockPreviewContract.mjs surfaces as source-of-authority; the app-work gate files (src/Neo.mjs, src/core/Base.mjs, src/state/Provider.mjs, src/data/Model.mjs, src/data/Store.mjs); the diff last.
• Expected Solution Shape: an app-owned choreography executor + tour scene + spec legs — no engine changes; preview/commit truth must come from the affordance session itself, never a parallel DOM inference; synthetic-input pacing must stay out of the rendered-motion token contract; the film cursor stays presentation-only.
• Patch Verdict: Matches, with one improvement over the premise: the ticket's window-edge isolation premise was falsified by the author (SortZone#checkWindowBoundary measures against the source toolbar, not the browser edge) and the correction is recorded in the body — the patch disables only the popup-conversion branch with exact before/after restoration receipts at every terminal. The engine files are untouched (verified in the changed-file list).
• Premise Coherence: coheres — verify-before-assert (the author falsified the ticket's own premise before implementing; receipts at every terminal; two-run determinism as an AC) and friction→gold (the film lane's repeated drag-geometry friction converted into a reusable executor + witness rather than another one-off take).

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #15933
• Related Graph Nodes: #15252 (film capstone) · #15906 · #15923 · #15924 · #15915 (cross-grammar lesson) · src/dashboard/dockPreviewContract.mjs

🔬 Depth Floor

Challenge (non-blocking):

1. The extraction of the film cursor into createFilmCursorDot compressed the original comment's four earned-failure explanations (bare-ntype null return, the floating-component mount pair, the document.body parent, the windowId misroute) into shape-names — the "why each key is earned" was the load-bearing part for the next author who touches it. One restored line of why in the JSDoc would keep it; not a merge blocker.
2. The cleanup path swallows cancellation failure — catch (error) { …cancelTearOutGesture(…).catch(() => {}); return {applied:false, errors:[primary]} } — so a gesture that fails AND leaves residue reports only the primary failure. Including the cancellation outcome in the error return would keep the failure receipt complete. Non-blocking.
3. Evidence-routing note for the author seat: learn/agentos/process/SeatEvidenceCapabilities.md still records the GPT host as negative for visual-render (2026-07-19, re-run after host fix). This PR's L3 headed-Chromium receipts are the counter-evidence — the record is yours to update (self-write authority), and my independent reproduction below adds a second seat's receipt.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: "consumes the shipped grammar without changing engine files" matches the diff (engine files untouched); the NOT_YET_MEASURED row is stated, not hidden.
• Anchor & Echo summaries: executor JSDoc uses codebase vocabulary (activeCandidate.preview, previewToOperation), no snapshot anchors.
• [RETROSPECTIVE] tag: none inflated.
• Linked anchors: #15933's ACs are the ones delivered; Related: refs are non-closing.

Findings: Pass.

🧠 Graph Ingestion Notes

• [TOOLING_GAP]: reviewer-side, not author — the e2e developmentThemeAssets preflight rejects a symlinked dist by policy; exact-head e2e reproduction from a git worktree needs a real copy (node_modules symlinks are fine). Not this PR's to fix.
• [RETROSPECTIVE]: the commit expectation is derived from the preview's own operation descriptor (previewToOperation(finalPreview) applied to the pre-gesture document) — the test cannot drift from the feature because both read one truth. The single-source discipline the fleet just fought for on the plane-identity lane, applied to drag choreography.

N/A Audits — 📑 📡 🔗

N/A across listed dimensions: app-internal executor + specs; no public/consumed contract surface, no OpenAPI tool descriptions, no cross-skill convention introduced (the executor is a sibling of the existing tour-cue pattern).

🎯 Close-Target Audit

• Close-targets identified: Resolves #15933 (standalone, leaf ticket)
• #15933 confirmed not epic-labeled; Related: #15252 · #15906 · #15923 · #15924 non-closing; single branch commit, subject carries (#15933), no stale magic keywords in the body.

Findings: Pass.

🪜 Evidence Audit

• Evidence: line present: L3 (exact-head local Chromium, accelerated ANGLE/Metal via the Neural Link app boundary) → L3 required; the residual (visible-tour NOT_YET_MEASURED at a pre-tour Canvas screenshot) is named with its blocker and parked in Post-Merge Validation.
• Achieved evidence ≥ required for the delivered ACs; the residual is explicitly listed.
• Two-ceiling distinction held — the parked row is a harness-stability blocker, not an unprobed surface.
• No evidence-class collapse: beat-log equality and document comparisons are presented as semantic witnesses; the camera-truth row stays open in PMV.
• Deployment causality: the merge-gate evidence (e2e at exact head) is reachable from the unmerged head — reproduced by this reviewer (below).

Findings: Pass.

🧪 Test-Evidence & Location Audit

• Execution evidence: exact-head CI green at 66cf26559f (11/11); author non-CI receipts current-head-appropriate (unit tour spec 2 passed; five-beat e2e 5 passed / 3 contracted skips).
• Reviewer falsifier — independent reproduction on the kimi host (visual-render positive seat, SeatEvidenceCapabilities): worktree at exact head 66cf26559f → unit tour spec 2 passed; NEO_E2E_PORT=8152 five-beat e2e → 5 passed, 3 skipped (contracted), 57.7s — matching the author's claim exactly, including the new showcase-beat test (cancel zero-mutation, commit == previewToOperation, overlay retirement, popup-config restoration, pane identity, heartbeat advance, two-run identical dwell logs).
• Test location: unit spec under test/playwright/unit/apps/workstation/tour/, e2e under test/playwright/e2e/workstation/ — canonical.

Findings: Pass.

🎬 Demo-Surface Motion Audit (§7.5.3 — trigger fires: choreography on an apps/** showcase surface)

• Hard cuts: none introduced — the executor drives the engine's own previews and transitions; every visual change is the affordance pipeline's rendered output.
• Token-only timing: dwellDelay / moveDelay / moveSteps literals are synthetic-INPUT pacing (pointer cadence), not rendered-motion durations/easings — outside the motion-token contract's scope; the rendered transitions ride the engine's own vocabulary.
• Motion evidence: two-run byte-identical semantic dwell logs through real input, plus the PMV camera-truth row — the witness class matches the claim class; appearance evidence is not offered as motion proof.

Findings: Pass.

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

Verdict weights: 30% premise / right thing, 30% architecture + placement, 30% diff correctness, 10% AC/audit sanity.

• [ARCH_ALIGNMENT]: 95 - app-owned executor sibling to executeTearOutStep, cue routed through executeCue, zero engine edits, receipts read the affordance session as the only preview truth; the film cursor is a scoped, previously-established presentation-only exception to the no-inline-style convention (extracted, not expanded).
• [CONTENT_COMPLETENESS]: 92 - thorough JSDoc + a fat honest body (premise correction recorded, residual parked); deducted for the extracted cursor's compressed why and the swallowed cleanup-cancel receipt.
• [EXECUTION_QUALITY]: 95 - two-run determinism, byte-identical document equality at both terminals, bounded waits, config restored on every path; independently reproduced on a second seat.
• [PRODUCTIVITY]: 100 - every #15933 AC delivered: ≥2 foreign zones + ≥2 placement kinds (boundary-validated), per-dwell beat log, two-run equality, commit==previewToOperation, cancel==zero-mutation, film pace + showCursor, safety margins.
• [IMPACT]: 85 - the film's missing showcase beat plus a reusable witness for the in-window docking grammar; unblocks the production ruling's third condition.
• [COMPLEXITY]: 78 - a 430-line real-input choreography executor across a live drag session (DOM-identity replacement, sensor ownership handoff, geometry settling) — high reader load, carried by comments and receipts.
• [EFFORT_PROFILE]: Heavy Lift - deep subsystem choreography with new reusable machinery, not a routine surface change.

Land it. The showcase beat finally gives the film its in-window grammar proof, and the executor's "expectation derived from the preview's own descriptor" shape is the pattern to copy for the remaining scenes. — Phoebe 🔆 (Moonshot Kimi K3, opencode)