PR Review Summary

Status: Approve+Follow-Up

🪜 Strategic-Fit Decision

Per §9 Strategic-Fit Step-Back:

• Decision: Approve+Follow-Up
• Rationale: New code is contract-compliant per the operator-stated foundational contract (NO HIDDEN DEFAULT VALUE FALLBACKS) — class-level keepAlive: -1 concrete defaults + explicit === undefined undefined-checks + deleted hardcoded "1h" magic-string from generate(). Pre-existing || fallback patterns in surrounding regions of SessionService.mjs (host / model / embeddingModel / chained-content fallbacks) are preserved unchanged — out-of-scope for this PR's keep_alive surface, tracked-better-as-follow-up than incremental-cycle. AC10 external-a partner tenant validation correctly held outside the close-set via Refs #12089 (no magic-close).

Peer-Review Opening: Thanks for the comprehensive keep_alive shape work — the negative-assertion test expect(payloads[0].options.keep_alive).toBeUndefined() is the load-bearing contract enforcement that prevents any future regression to nesting under options, which was the original #12080 silent-bypass anchor. Clean execution under the contract framing I shared earlier today.

🕸️ Context & Graph Linking

• Target Epic / Issue ID: Refs #12089 (intentionally non-closing; AC10 = external a partner tenant/operator compose validation)
• Related Graph Nodes: #12080 (Ollama stream keep_alive nesting fix — completed in PR #12083; this PR consolidates + extends to OpenAiCompatible), #12061 cycle-4 contract anchor, feedback_no_hidden_default_fallbacks.md (banked discipline), feedback_neo_native_integration_check.md (provider-axis discipline)

🔬 Depth Floor

Challenge OR documented search (per guide §7.1):

• Challenge: The OpenAiCompatible payload propagation at OpenAiCompatible.mjs:112-114 does if (clonedOptions.keep_alive === undefined) { payload.keep_alive = this.keepAlive; } — the inverse path (caller passes explicit keep_alive: 0 or '10m') relies on the subsequent Object.assign(payload, clonedOptions) line to land the value. That works today because Object.assign is unconditional, but if any future refactor wraps that with a conditional, the explicit-override path silently breaks while the default path keeps working. Worth a stand-alone test asserting provider.generate(prompt, {keep_alive: 0}) lands keep_alive: 0 on the OpenAiCompatible JSON payload, mirroring the Ollama coverage. Non-blocking — the current implementation is correct; this is regression-armor for a likely-future refactor surface.

Rhetorical-Drift Audit (per guide §7.4): N/A — no architectural prose / JSDoc anchor / [RETROSPECTIVE] tag in the diff; only mechanical config + provider-payload-shape changes with descriptive JSDoc on the new class config.

Findings: Pass

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: This PR is the operationalization of feedback_no_hidden_default_fallbacks.md at the provider-config-layer — class-instance defaults flow from Tier-1 config verbatim, callers override per-request, no hidden substitution. The same pattern landed in PR #12092 (orchestrator providerReadiness config) — consistent shape across two adjacent PRs adds up to substrate-coherent enforcement of the contract.

🎯 Close-Target Audit

(Required per guide §5.2 when the PR body or commit messages contain magic-close keywords. Mark N/A for PRs without close-target keywords.)

• Close-targets identified: none (PR uses Refs #12089 deliberately; AC10 external validation residual)
• Per pull-request-workflow.md §4.5 (Close-Target Verification): branch-history magic-close audit relevant since GitHub squash-merge can concatenate; verified via diff inspection — no Closes #N / Fixes #N / Resolves #N in commit bodies or PR body. Clean.

Findings: N/A — explicit non-closing reference shape

📑 Contract Completeness Audit

• Originating ticket #12089 documents the keep_alive symmetry mandate across both Ollama + OpenAiCompatible provider families
• Implemented PR diff matches the mandate — both providers get keepAlive: -1 class default + explicit per-call override path + payload-level propagation

Findings: Pass

🪜 Evidence Audit

PR body declares Evidence: line; verified achieved evidence covers the contract surface via the KeepAlive.spec.mjs negative-assertion tests; AC10 residual explicitly held outside the close-set as external a partner tenant/compose validation.

• PR body contains Evidence: declaration line
• Achieved evidence ≥ close-target required evidence for the closed AC subset; AC10 residual annotated via Refs (not magic-close)
• Two-ceiling distinction respected — substrate-shipped at the achievable ceiling for the Neo-side surface; external a partner tenant/compose ceiling is the deferred path

Findings: Pass

🔗 Cross-Skill Integration Audit

N/A — no skill files, MCP tool surfaces, AGENTS.md / AGENTS_STARTUP.md, or architectural-primitive convention changes. The new Env.parseKeepAlive parser is documented in learn/agentos/ConfigSubstrateEnvVarAudit.md per the existing env-binding pattern.

Findings: All checks pass — no integration gaps

🧪 Test-Execution & Location Audit

• Branch checked out locally via git fetch origin pull/12093/head:pr-12093-verify
• Canonical location: test/playwright/unit/ai/provider/KeepAlive.spec.mjs correctly mirrors ai/provider/Ollama.mjs + ai/provider/OpenAiCompatible.mjs per unit-test.md
• CI unit band on this PR head e80ccd53b: SUCCESS
• Negative-assertion contract test verified by inspection: expect(payloads[0].options.keep_alive).toBeUndefined() proves the Ollama top-level payload contract empirically — would fail under any future regression that nests keep_alive under options

Findings: Tests pass; canonical placement correct; load-bearing contract assertions present

Conditional Audit Triggers

• 🔌 Wire-Format Compatibility Audit (triggered): PR alters the Ollama /api/chat JSON-RPC payload envelope shape (top-level keep_alive field surfaces unconditionally instead of being either omitted or "1h"-defaulted by generate() post-fact). Pre-#12089 wire shape: keep_alive could appear either at top-level (caller-set) OR be force-injected to "1h" by Ollama.generate() line 108 (deleted in this PR). Post-#12089 wire shape: keep_alive ALWAYS appears at top-level with the instance default (-1) when caller doesn't override. This is a NETWORK-OBSERVABLE behavior change but consistent with Ollama's documented API surface — /api/chat reads keep_alive at top-level per Ollama spec; the new payload shape is the spec-conformant one. The OpenAiCompatible payload addition is a non-standard extension that backends ignore if unsupported (per the JSDoc — "unsupported servers ignore the non-standard payload field"). Cleared.

📋 Required Actions

For zero-issue PRs — use the null-state sentence:

No required actions — eligible for human merge.

The OpenAiCompatible explicit-override test (per Depth Floor challenge) is non-blocking regression-armor for a future-refactor scenario; flagged for the follow-up.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 38/40 - Contract-coherent across both provider families; matches PR #12092 substrate-shape; deleted the silent "1h" magic-string injection that PR #12080 partially addressed
• [CONTENT_COMPLETENESS]: 28/30 - Tier-1 + MC config + both providers + Env parser + SessionService + ConceptDiscoveryService + comprehensive test all land together; -2 for the OpenAiCompatible explicit-override path not having a stand-alone test (per Depth Floor)
• [EXECUTION_QUALITY]: 19/20 - Explicit === undefined checks (not ||-truthy which would mishandle legitimate 0); negative-assertion test in KeepAlive.spec is the contract-enforcement safety belt; consolidated stream() duplication into preparePayload
• [PRODUCTIVITY]: 9/10 - One PR delivers the cross-provider symmetry that #12089 mandates; Refs-not-Closes correctly holds AC10 residual outside the close-set
• [IMPACT]: 9/10 - Eliminates per-call context-prefill cost on Ollama (the original #12089 substrate motivation); makes OpenAiCompatible servers that honor keep_alive (LM Studio, Ollama's /v1/... surface) opt-in for the same benefit
• [COMPLEXITY]: 8/10 - 23 files; mostly mechanical config + test additions; the new Env parser is bounded + the helper consolidation in Ollama.mjs is net-simplification (-deleted-stream-duplication)
• [EFFORT_PROFILE]: Architectural Pillar — provider-keep-alive defaults are deployment-wide substrate; coherent with PR #12092 shape across the broader Sandman/REM substrate evolution

Ready for operator merge alongside PR #12092 once your CI gate settles (both PRs in the queue). Welcome the OpenAiCompatible-explicit-override test as a follow-up commit on this branch if you have cycles, or file it as a tiny standalone — either way non-blocking.