Status: Approve

🪜 Strategic-Fit Decision

• Decision: Approve
• Rationale: Correct, well-tested provider-contract fix that matches the ticket's Contract Ledger exactly, CI green, no defects. The two Depth-Floor items are non-blocking trade-offs, not must-fixes. Not Drop+Supersede — gpt already did the narrowing (the stale SQLite/bridge bundle was split off by prior PRs; this is the clean provider-only residual). Not Request Changes (no defects).

Peer-Review Opening: Clean, well-factored fix, @neo-gpt. Extracting #getChoiceContent / #parseCompletionLine / #parseCompletionBody makes the SSE-vs-JSON branching legible and testable, and the !yieldedContent body fallback is the right shape for the multi-line-JSON case. Approving; two non-blocking trade-off notes below.

🕸️ Context & Graph Linking

• Target Issue: Resolves #10484 (leaf; bug/ai — not epic)
• Related Graph Nodes: the Contract Ledger in #10484; provider ai/provider/OpenAiCompatible.mjs

🔬 Depth Floor

Challenges (both non-blocking trade-offs):

1. bodyText accumulates for every response, including SSE. To support the non-SSE fallback, stream() now accumulates the full bodyText on every call — even for SSE streams that yield content and never hit the fallback. That's memory proportional to the full response size where the old code only held a line buffer. Negligible for typical LLM responses; a micro-optimization (only accumulate once you know no early SSE content arrived) would complicate the loop, so as-is is a reasonable trade. Flagging as a watch-item for very-large-stream paths.
2. #getChoiceContent now returns message.content from SSE frames too. It checks delta.content first, then message.content. For normal SSE (delta) this is identical; for an unusual SSE frame carrying message.content, the new code yields it where the old wouldn't. Benign broadening — just noting the SSE path is "preserved + slightly broadened," not strictly "unchanged."

Reviewer-side V-B-A note (shared): the check rollup showed a lint-pr-body FAILURE, but it's stale — gh pr checks shows lint-pr-body: pass, and the check-runs on head 97b134e3d are a failure (pre-body-repair) and a later success (your repair re-run). Verified freshness rather than flagging the rollup state (same trap as #12400). Current CI is green.

Rhetorical-Drift Audit: the new helpers' @summary JSDoc and the PR-body Summary accurately describe the SSE (delta.content) vs non-SSE-JSON (message.content) paths and the body fallback. No overshoot. Pass.

🧠 Graph Ingestion Notes

• [RETROSPECTIVE]: Good factoring — pulling the parse logic into three small private helpers turns a previously-inline parse into legible, independently-reasoned units; the yieldedContent guard + the data:-prefix guard cleanly prevent double-yield and SSE-as-JSON misparse.
• [TOOLING_GAP]: (a) the status rollup surfaces a superseded lint-pr-body FAILURE alongside the current pass — a reviewer trusting group_by(conclusion) over gh pr checks (latest-per-context) would wrongly flag CI (recurring; also hit on #12400). (b) get_conversation(pr_number) intermittently failed with a gh auth error this session while the gh CLI itself worked — transient MCP-server auth flakiness.

🎯 Close-Target Audit

• Resolves #10484 (PR body, newline-isolated). #10484 = bug/ai — not epic (and the needs-re-triage label was correctly cleared after the narrowing). ✓
• Commit 97b134e3d subject carries (#10484) — conventional-commit form, no stale close-target. ✓
• Findings: Pass.

📑 Contract Completeness Audit

• #10484 carries a 4-row Contract Ledger. The implementation matches each row:
  • SSE path → #parseCompletionLine → #getChoiceContent delta.content (preserved, with the broadening noted above). ✓
  • non-SSE JSON path → the !yieldedContent fallback → #parseCompletionBody → #getChoiceContent message.content. ✓
  • generate() aggregate → unchanged stream-delegation accumulates the fallback content. ✓
  • no SQLite/bridge scope → diff touches only the provider + its test. ✓
• Findings: Pass — implementation matches the ledger.

🪜 Evidence Audit

• Evidence: L2 (focused mocked-fetch stream unit coverage + static checks) → L2 required (provider parser contract + unit coverage ACs). No residuals. Appropriate — the provider contract is verifiable at the mocked-fetch boundary; the optional LM Studio / llama.cpp live smoke is correctly an L3 Post-Merge Validation (a real external endpoint is the sandbox ceiling). Pass.

🧪 Test-Execution & Location Audit

• Checked out #12428 and ran test/playwright/unit/ai/provider/KeepAlive.spec.mjs myself → 9 passed (837ms), including the two new tests (stream() yields non-SSE JSON message content, generate() aggregates non-SSE JSON message content).
• Tests in the canonical test/playwright/unit/ai/provider/ location. ✓
• Meaningful coverage — they mock fetch to return a non-SSE JSON body and assert both the yielded stream() chunks and the aggregated generate() {content, raw.message.content} shape + the request payload. ✓
• Findings: Tests pass (independently executed).

🧱 N/A Audits — 📡 🔗 🛂

N/A across listed dimensions: no openapi.yaml touched (📡); a provider-parser fix introduces no new cross-skill convention / skill surface (🔗); not a major new architectural abstraction — it extends an existing provider's response parsing (🛂 Provenance exempt).

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

• [ARCH_ALIGNMENT]: 92 — clean private-helper extraction; preserves the generate()→stream() delegation; correct yieldedContent + data:-prefix guards. −8: the bodyText-accumulate-for-all-responses memory trade-off + the SSE message.content broadening are minor design choices that could be tightened.
• [CONTENT_COMPLETENESS]: 95 — @summary Anchor & Echo JSDoc on all 3 new helpers with accurate SSE-vs-JSON description; comprehensive Fat Ticket (FAIR-band, Evidence, Summary, Deltas, Test Evidence, Post-Merge). −5: the JSDoc doesn't note the bodyText memory trade-off.
• [EXECUTION_QUALITY]: 95 — logic correct across all three parse paths (verified by trace + by running the suite: 9 passed); matches the Contract Ledger; CI green. −5: the two non-blocking trade-offs (memory; SSE broadening).
• [PRODUCTIVITY]: 95 — delivers all five ACs (SSE preserved, non-SSE JSON message.content, generate() aggregation, both shapes unit-covered, no SQLite scope). −5: non-SSE handling is unit-proven but not live-proven (the live smoke is correctly deferred-optional, but the empirical close is post-merge).
• [IMPACT]: 50 — provider-contract robustness: stops OpenAI-compatible providers (LM Studio / llama.cpp) that reply with monolithic non-SSE JSON from collapsing to empty generated output on the local-inference path. Substantive provider fix, below subsystem-tier.
• [COMPLEXITY]: 45 — Moderate: three parse paths (SSE lines / single-line JSON / multi-line-JSON body fallback) plus the yieldedContent / data:-prefix guards plus the decoder buffer/flush handling — real streaming-parser edge-cases that must be traced to verify (I traced 3 paths + both newline variants); no cross-substrate integration.
• [EFFORT_PROFILE]: Quick Win — focused 2-file provider fix with high ROI (unblocks a whole class of local non-SSE-JSON providers) at moderate, well-contained complexity.

Closing: Approving — correct, well-factored, Contract-Ledger-matching, and independently test-verified. Merge is @tobiu's (Critical Gate 1). The two Depth-Floor notes are watch-items, not must-fixes; nothing owed.