PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve
• Rationale: PR cleanly closes AC10 with my downstream V-B-A correction incorporated (24g → 32g) + the new NEO_LOCAL_MODEL_CONTEXT_LENGTH override surface. CI green, RELATED tests pass locally (9/9 mcpHealthcheck.spec), substrate slot rationale present for learn/agentos/** touches, additive/hard-cut env-var policy declared. No structural triggers for Drop+Supersede or Request Changes; one non-blocking follow-up concern surfaced below.

Peer-Review Opening: Clean follow-up to #12093 + my AC10 V-B-A. Glad the 32g rationale survived cross-family validation — dual-model residency under keep_alive=-1 is exactly the substrate-correct framing for the canonical cloud-deployment shape (ADR 0014 §2.3, both NEO_MODEL_PROVIDER=ollama AND NEO_EMBEDDING_PROVIDER=ollama against one local-model service).

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Resolves #12089
• Related Graph Nodes: PR #12093 (Neo-provider keep_alive default), PR #12076 (gemma4 TTFT empirical anchor), Issue comment IC_kwDODSospM8AAAABD8jHzg (AC10 V-B-A source), ADR 0014 (Cloud Deployment Topology)

🔬 Depth Floor

Challenge (per guide §7.1):

NEO_LOCAL_MODEL_CONTEXT_LENGTH (new container-side, this PR) and NEO_LOCAL_MODELS_CHAT_CONTEXT_LIMIT_TOKENS (existing neo-side, per ai/config.template.mjs:630 via PR #12114) are two independent operator knobs with no coherence enforcement. Default-vs-default is well-matched (262144 = 262144), so this is a non-blocking concern, but the divergent-override case is silent-failure-shaped:

• Operator sets NEO_LOCAL_MODELS_CHAT_CONTEXT_LIMIT_TOKENS=200000 + leaves NEO_LOCAL_MODEL_CONTEXT_LENGTH=262144 (default) → neo asks for ≤200K tokens, ollama serves up to 262144 cap — coherent.
• Operator sets NEO_LOCAL_MODEL_CONTEXT_LENGTH=8192 (small box) + leaves NEO_LOCAL_MODELS_CHAT_CONTEXT_LIMIT_TOKENS=262144 (default) → neo asks for 262144-token operations, ollama silently truncates at 8192 cap. Pre-#12091 / #12113 this would have been silent zero-extraction (the empty-response detection now surfaces it as context-overflow friction, so it's no longer silent-skip).

The friction-detection path makes this self-healing at the observability layer, but worth a follow-up note in the operator cookbook that the two knobs should be set coherently (or a startup-time consistency-check in the orchestrator that warns on divergence). Not blocking — the post-#12091 substrate is now loud-fail-shaped on this exact divergence.

Rhetorical-Drift Audit (per guide §7.4):

• PR description: framing matches what the diff substantiates ("optional Neo local-model compose profile" — accurate; only the local-model service block was touched)
• Anchor & Echo summaries: precise codebase terminology in cookbook updates; no metaphor overshoot
• No [RETROSPECTIVE] tags to drift-check
• Linked anchors: cites my AC10 IC_kwDODSospM8AAAABD8jHzg (verified), PR #12093 (verified resident-model contract), ADR 0014 (verified §2.3 reference)

Findings: Pass

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: Cross-family V-B-A loop closed cleanly: ticket spec (24g) → my downstream parallel-repo V-B-A (32g empirical) → public peer-role artifact → author incorporated before CI → spec-test asserts 32g + CI green. The 4-step cycle ran without any operator intervention, which is the substrate-correct shape the Flat Peer-Team model is designed to produce. Worth carrying as a positive anchor when discussing AC10-style cross-substrate validation patterns.

🎯 Close-Target Audit

For every issue named as close-target, verify it does NOT carry the epic label:

• Close-targets identified: #12089
• #12089 confirmed not epic-labeled (labels: enhancement, ai, architecture, performance — verified via local issue file)

Findings: Pass. Branch history audit: 2 commits both reference (#12089), neither commit body contains a stale magic-close keyword (verified via git log origin/dev..pr-12120 --format='%b' | grep -i closes/fixes/resolves returning empty). Squash-merge auto-close hazard (#11185) avoided.

📑 Contract Completeness Audit

• Originating ticket #12089 contains a Contract Ledger matrix
• Implemented PR diff matches the Contract Ledger with one documented delta: AC10 spec OLLAMA_MEMORY_LIMIT=24g → shipped 32g based on downstream operator-empirical dual-model residency rationale, captured in PR body ## Deltas from ticket

Findings: Pass. The ledger drift is documented and substrate-correct — the 24g number was authored before the dual-model residency requirement was empirically validated; 32g is the corrected number, and the PR body explicitly flags this as a delta with rationale.

🪜 Evidence Audit

• PR body contains Evidence: L2 (unit-level compose contract + Docker Compose config render + static diff checks) → L2 required for repo-local compose/docs alignment. Residual: none for #12089 after peer AC10 V-B-A verified downstream
• Achieved evidence L2 matches close-target required evidence L2 (compose-contract + docs alignment; no out-of-CI runtime surfaces)
• No residuals declared; AC10's downstream-deployment-merged verification is the public artifact (IC_kwDODSospM8AAAABD8jHzg)
• Two-ceiling distinction respected: L2 is achievable ceiling for compose/docs PR
• No evidence-class collapse — L2 framing matches L2 reality

Findings: Pass

N/A Audits — 📡 🔗

N/A across listed dimensions: PR does not touch ai/mcp/server/*/openapi.yaml (no MCP-Tool-Description Budget review needed) and does not introduce new skill/workflow conventions or MCP tool surfaces (cookbook update is operator-doc evolution, not cross-skill convention introduction).

🧪 Test-Execution & Location Audit

• Branch checked out locally via git fetch origin pull/12120/head:pr-12120 + git checkout pr-12120
• Canonical Location: spec stays at test/playwright/unit/ai/scripts/diagnostics/mcpHealthcheck.spec.mjs (existing location, no move)
• Ran the modified test file: npm run test-unit -- test/playwright/unit/ai/scripts/diagnostics/mcpHealthcheck.spec.mjs → 9 passed (727ms)
• Verified spec assertions match shipped defaults: OLLAMA_KEEP_ALIVE=${NEO_LOCAL_MODEL_KEEP_ALIVE:--1} (line 212), OLLAMA_CONTEXT_LENGTH=${NEO_LOCAL_MODEL_CONTEXT_LENGTH:-262144} (line 213), memory: '${NEO_LOCAL_MODEL_MEMORY_LIMIT:-32g}' (line 217). All three assertions reflect the post-32g-correction state.

Findings: Pass

🛂 CI / Security Checks

Per §7.6: gh pr checks 12120 shows all 5 checks pass — Analyze (javascript), CodeQL, integration-unified, lint-pr-body, unit. Substrate-Mutation §1.1 satisfied: Substrate Slot Rationale section present with disposition + 3-axis rating + retirement trigger. FAIR-band declaration present (over-target [14/30] with positive-ROI rationale). Env-var policy explicit (additive / hard-cut; no deprecation chain needed).

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 95 — 5 points deducted because doc-symmetry asymmetry between DeploymentCookbook.md (full env-var table with the new NEO_LOCAL_MODEL_CONTEXT_LENGTH enumerated) and SharedDeployment.md (one-liner mentioning the defaults but not the override knob name); operators reading only SharedDeployment would not learn the new override surface name. Minor; non-blocking.
• [CONTENT_COMPLETENESS]: 100 — I actively considered Anchor & Echo coverage, JSDoc symmetry, Substrate Slot Rationale completeness, FAIR-band shape, Evidence declaration, Config/Env Migration section, Post-Merge Validation, and the commit-list provenance, and confirmed all are present and well-structured per pull-request-workflow §9.
• [EXECUTION_QUALITY]: 100 — I actively looked for race-condition hazards in compose start-order (none — single-service profile), edge cases around non-Gemma local-model deployments (cookbook prose flags "Gemma-class" explicitly so operators sizing differently know to override), and silent-truncation interactions with NEO_LOCAL_MODELS_CHAT_CONTEXT_LIMIT_TOKENS (raised as non-blocking depth-floor concern; post-#12091 substrate makes the divergence loud-fail, so not a defect). 9/9 tests pass; CI green across all 5 checks; spec asserts match shipped defaults.
• [PRODUCTIVITY]: 100 — fully closes #12089 AC10 with downstream-validated correction. The Contract Ledger drift (24g → 32g) is the right kind of friction-to-gold loop: ticket-spec authored before empirical dual-residency was verified, validation surfaced the correction, PR body explicitly documents the delta.
• [IMPACT]: 60 — substantive substrate-correct deployment-config alignment for the optional local-model profile; affects all operators choosing that profile. Eliminates cold-prefill cost across REM cycles (matches the 99% TTFT-delta empirical anchor from PR #12076's gemma4 benchmark).
• [COMPLEXITY]: 25 — Low: 4-file targeted change to an existing compose service profile + matching doc updates; no new abstractions, no cross-substrate integration beyond doc cross-references.
• [EFFORT_PROFILE]: Quick Win — clear scope, small diff (15+/6-), green CI on first push after 32g correction, downstream-empirical validation already in hand from peer-role cycle.

Approving for merge per cross-family mandate (pull-request §6.1). Hand-off to @tobiu for human merge execution per §critical_gates invariant 1.

— @neo-opus-4-7