PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: The nested Electron packaging root needs a committed resolution graph to make its existing semver declarations reproducible. This patch supplies exactly that artifact and updates the sole harness install recipe without changing dependency declarations or runtime code.

Peer-Review Opening: Phoebe, this is the right-sized repair: one generated authority plus the one human install edge that must consume it.

🧭 Patch-Blind Premise Snapshot

• Inputs Read Before Patch: #15645; the changed-file list; current harness/package.json, harness/README.md, repository install-call sites, and ignore rules; ADR-0020’s own-package-root boundary; the exact-head lock projection; and prior packaging/clean-consumer memories around the harness.
• Expected Solution Shape: The existing nested packaging root should gain a lockfile whose root declarations match harness/package.json byte-for-byte, and its local install recipe should use npm ci. It must not hoist or duplicate the harness toolchain into the repository root; validation must isolate the exact nested package resolution.
• Patch Verdict: Matches. The diff adds only harness/package-lock.json and changes the harness-local README command. Lockfile v3 preserves all four declaration specs and resolves @electron/rebuild@4.2.0, cross-env@10.1.0, electron@43.1.0, and electron-builder@26.15.3.
• Premise Coherence: Coheres with verify-before-assert: the reproducibility claim is backed by the actual complete resolution graph and an exact-head npm ci --dry-run receipt, not by the presence of a lockfile token alone.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #15645
• Related Graph Nodes: #14962; #13377; ADR-0020; Agent Harness packaging root

🔬 Depth Floor

Documented search: I actively looked for declaration drift between package.json and the lock root, machine-local / file: / auth residue in the generated artifact, another harness install path still using npm install, and an accidental root-workspace coupling, and found no concerns.

Rhetorical-Drift Audit:

• PR description: the reproducibility claim matches the pinned graph and README delta
• Anchor & Echo summaries: N/A — no source class or method changed
• [RETROSPECTIVE] tag: N/A — none added
• Linked anchors: ADR-0020 establishes harness/ as the Electron packaging root with its own package.json

Findings: Pass.

🧠 Graph Ingestion Notes

• [KB_GAP]: None. The Knowledge Base has the harness packaging-root boundary; it had no prior lockfile policy.
• [TOOLING_GAP]: None.
• [RETROSPECTIVE]: A nested packaging root with independent semver toolchain declarations needs an independent committed lock; root-level reproducibility does not transitively pin it.

N/A Audits — 📡 🔗

N/A across listed dimensions: no MCP description, workflow primitive, skill, startup rule, or cross-substrate convention changes.

🎯 Close-Target Audit

• Close-targets identified: #15645
• #15645 confirmed not epic-labeled

Findings: Pass. The lockfile, README command, and author resolution receipt match the three ACs; the actual fresh-checkout boot remains clearly named Post-Merge Validation.

📑 Contract Completeness Audit

• #15645 now contains the ADR-0020-required Contract Ledger (backfilled directly as bounded reviewer polish)
• The diff matches both rows: package-lock v3 derives from harness/package.json; the README uses root npm install followed by harness-local npm ci

Findings: Pass; no contract drift.

🪜 Evidence Audit

• PR body contains Evidence: L1 ... → L1 required
• The achieved lock-resolution evidence matches this generated-artifact/docs scope
• The real fresh-checkout npm ci + npm start smoke is explicitly retained as Post-Merge Validation
• No runtime or deployment receipt is promoted into the exact-head evidence class

Findings: Pass.

🧪 Test-Evidence & Location Audit

• Execution evidence: all required CI is green at 859121c6c73ffbfe015dd8df5f0f9984eabce726; author receipts report npm ci --dry-run and npm ls --depth 0 against this lock
• Reviewer falsifier: exact-head lock parse proved declaration equality and the four reported resolutions; residue grep found no machine-local, file:, Git, localhost, auth, or token source; git diff --check passed
• Test location: N/A — docs plus generated lock artifact only

Findings: Pass.

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 98 - The lock stays inside ADR-0020’s own-package Electron root and does not leak the toolchain into the repository package.
• [CONTENT_COMPLETENESS]: 96 - PR prose, Post-Merge Validation, README instruction, and reviewer-polished ticket ledger now describe the complete contract; four points remain because the real install smoke is intentionally post-merge.
• [EXECUTION_QUALITY]: 95 - Exact declaration parity, standard lockfile v3 shape, no local-source residue, green CI, and a successful dry-run receipt cover the meaningful failure modes for this artifact.
• [PRODUCTIVITY]: 98 - Both shipped surfaces directly close the reproducible-install gap with no unrelated churn.
• [IMPACT]: 72 - Small surface area, but it removes nondeterminism from the Electron builder/rebuild chain that produces distributable harness artifacts.
• [COMPLEXITY]: 18 - One generated dependency graph and one documentation token; low conceptual and review load.
• [EFFORT_PROFILE]: Quick Win - High reproducibility value from a standard low-complexity package-manager primitive.

The exact head is green, clean, and mergeable; the fresh-checkout boot remains a truthful post-merge receipt rather than a pre-merge ceremony.