PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: This is the smallest coherent build-root slice that proves the source Agent OS app and popup can share the App-Worker heap under Electron while enforcing the packaged security boundary. Brain hosting, lifecycle/tray, credential ingress, packaging/signing, and updater work remain correctly downstream.

Peer-Review Opening: Vega's original runtime mechanism survives the security convergence intact. Exact head 9757d61984437fdb0cdf8e74016da9630f5a4c09 now delivers the first runnable Electron harness without turning app:// into a repository exfiltration surface; the real smoke and every hosted gate are green.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: Issue #14962 and parent #13033; ADR 0020 and ADR 0034; the in-tree SharedWorker spike; the complete original changed-file list and diff; Electron's current protocol/session/BrowserWindow contracts; the harness runtime and README; ArchitectureOverview; exact-head hosted checks.
• Expected Solution Shape: One optional top-level harness root may materialize the existing source Agent OS app on a stable privileged origin, but the renderer must receive only the source/assets it needs. Filesystem resolution, CSP, renderer flags, popup/navigation/webview policy, permissions, preload/IPC, generated-asset readiness, and the smoke verdict must all fail closed; the browser dev loop remains independent.
• Patch Verdict: Matches after maintainer convergence. Commits c2421d7b32 and 9757d61984 replace unrestricted repo-root serving with an explicit content policy, realpath/symlink containment, document security headers, secure flags on every window, complete permission denial, sender-validated smoke-only IPC, required-asset preparation, and a verdict that fails on runtime/asset/shared-heap regressions.
• Premise Coherence: Coheres with verify-before-assert and the two-hemisphere organism: the secured vessel wraps the organism without becoming a third source hemisphere or leaking Brain/config/git material to the renderer.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #14962
• Related Graph Nodes: parent #13033; epic #13377; ADR 0020; ADR 0034; SharedWorker spike #14786

🔬 Depth Floor

Challenge: I tested the security boundary as an attacker-facing file server, not only as a boot path. The original shape exposed repo-root files such as environment/config/git material and did not make missing CSS/theme assets or renderer failures fatal. The corrected resolver exposes only the named Agent OS source graph and public assets, canonicalizes through realpath, rejects symlink escape, returns uniform 404s, and attaches CSP only to documents. The smoke exercises that corrected protocol rather than bypassing it.

Rhetorical-Drift Audit (per guide §7.4):

• PR description now names the allowlisted source graph rather than unrestricted repo-root serving.
• Anchor & Echo summaries use durable harness/security terminology and do not embed review-cycle snapshots.
• [RETROSPECTIVE] below describes the actual packaged-content failure class.
• ADR 0020, ADR 0034, #14962, and the SharedWorker spike establish the cited boundaries/mechanism.

Findings: Pass after the PR body, #14962 Contract Ledger, ADRs, and ArchitectureOverview were synchronized. No current artifact claims a worker-network trace the smoke does not measure.

🧠 Graph Ingestion Notes

• [KB_GAP]: None after correcting the repo-root/document-root framing across the issue, PR, ADR, and inventory.
• [TOOLING_GAP]: Hosted CI still lacks an Electron GUI lane; the pure policy suite covers the deterministic boundary while the real local smoke remains the executable runtime gate.
• [RETROSPECTIVE]: A traversal check is not a packaged-content policy. A privileged origin over a repository needs an explicit allowlist, canonical realpath containment, uniform denial, and a runtime verdict that treats required assets and renderer errors as correctness.

🎯 Close-Target Audit

• Close-targets identified: #14962 only.
• #14962 is an open enhancement/ai leaf and is not epic-labeled.

Findings: Pass. Parent #13033 and epic #13377 remain related, non-closing nodes for later Brain-hosting/distribution slices.

📑 Contract Completeness Audit

• #14962 now contains a five-row Contract Ledger for the renderer-content boundary, window posture, smoke IPC, readiness verdict, and browser dev-loop isolation.
• Exact-head runtime/docs/tests match those rows; parent #13033 remains open for Agent OS lifecycle and hosting-arm work outside this slice.

Findings: Pass. No current slice silently implements or closes the parent ledger's Brain-lifecycle rows.

🪜 Evidence Audit

• PR body declares Evidence: L2 ... → L2 required and names the GUI-hosted-CI ceiling.
• Achieved evidence meets #14962's boot/window/shared-heap/security ACs: pure policy tests plus a real Electron runtime smoke.
• The remaining operator npm start check is named under Post-Merge Validation rather than promoted to completed L3 evidence.
• Review language keeps local Electron proof distinct from hosted policy/unit evidence.
• No L2 evidence is framed as visual-feel or release-installation proof.

Findings: Pass. ContentPolicy.spec.mjs is 6/6; Electron 43.1 smoke exits 0 with 109+109 nodes, popup/sharedHeap/assets true, and empty failure arrays; every hosted exact-head gate passes.

📡 MCP-Tool-Description Budget Audit

Findings: N/A — no ai/mcp/server/*/openapi.yaml or MCP tool description changes.

🛂 Provenance Audit

• Origin: ADR 0020 establishes the optional Agent Harness vessel; ADR 0034 specifies the Electron origin/window/security contract; the committed #14786 spike proves the privileged-origin multi-window mechanism; #14962 narrows this PR to runnable slices 1–2.
• Implementation lineage: The original two commits establish boot and naming; Euclid's two ticketed maintainer commits harden the exact same mechanism rather than introducing a competing architecture.
• Findings: Pass — every major abstraction has an in-repo authority and falsifiable evidence path.

📜 Source-of-Authority Audit

• Findings: Pass. ADR 0034 owns origin, window, permission, CSP, preload, and source-graph parity posture; ADR 0020 owns the vessel/source-tree boundary; #14962 owns the current close target. Later Brain lifecycle, credential, tray, signing, and updater authorities are not absorbed.

🔗 Cross-Skill Integration Audit

• ArchitectureOverview inventories harness/ with the corrected allowlisted-source-graph boundary.
• ADR 0020 and ADR 0034 describe the new top-level primitive and its dev/source/security relationship.
• harness/README.md is the operational entrypoint for start/smoke and downstream slice authors.
• No startup skill, MCP reference, or AGENTS turn-loaded surface needs modification for this optional packaging root.

Findings: All checks pass — no integration gaps.

🧪 Test-Execution & Location Audit

• Exact branch checked out locally in the dedicated assist worktree.
• Pure policy coverage is canonically placed at test/playwright/unit/harness/ContentPolicy.spec.mjs.
• The changed policy file was run directly: 6/6 passed.
• Code changes also received syntax, git diff --check, structure-map, real Electron smoke, and hosted exact-head verification.

Findings: Tests pass and placement is coherent: packaging code stays under top-level harness/, policy coverage stays under unit/harness, and neither Body nor Brain imports the vessel.

📋 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. These are importance-to-verdict weights, not effort budgets.

• [ARCH_ALIGNMENT]: 100 - vessel/organism boundary, ADR ownership, and source-graph parity align
• [CONTENT_COMPLETENESS]: 100 - issue ledger, README, ADRs, inventory, PR body, and runtime say the same allowlisted story
• [EXECUTION_QUALITY]: 100 - adversarial policy probes, clean Electron smoke, static checks, and hosted gates pass
• [PRODUCTIVITY]: 100 - two direct circuit-breaker commits close the security/runtime gap without an author comment cycle
• [IMPACT]: 94 - first runnable native harness and the root security boundary inherited by later Electron leaves
• [COMPLEXITY]: 78 - custom protocol, filesystem policy, multi-window runtime, preload IPC, and source-asset preparation
• [EFFORT_PROFILE]: Architectural Pillar - small surface count with high-blast security and runtime semantics

Excellent mechanism, now with the fail-closed boundary it needed. Exact head 9757d61984 is eligible for the human merge gate.