Independent stack-layer review on 050fad62.

The warning-code/policy plumbing and ordered immutable snapshots are strong (packages/producer/src/services/render/renderEventPublisher.ts:25, packages/producer/src/services/renderOrchestrator.ts:522).

Blocker — packages/producer/src/services/renderOrchestrator.ts:3091: the failed terminal event is published and flushed before failedStage and errorDetails are assigned (:3093, :3100). Because OrderedRenderEventPublisher.publish() snapshots immediately (packages/producer/src/services/render/renderEventPublisher.ts:29), every progress sink receives a permanently incomplete failure snapshot; it also records failedStage only after updateJobStatus has overwritten currentStage with the formatted error string. Populate the structured failure fields (capturing the actual pre-failure stage) before publishing, and pin that contract in the publisher test.

The current regression/preflight runs are green; the UNSTABLE surface is cancelled superseded runs plus pending Graphite mergeability, not the reason for this verdict.

Verdict: REQUEST CHANGES
Reasoning: The PR promises structured ordered terminal outcomes, but the immutable failed snapshot omits the very failure structure downstream consumers need.

— Home

Reviewed at 050fad6.

Core refactor is genuine — installDebugLogger → createRenderFileLogger is a real fix (concurrent renders would trash each others' console.log/warn/error globally, since the old path patched the process-global object), and OrderedRenderEventPublisher correctly serialises async sinks + contains failures at the boundary. Structured CaptureWarning codes + dedup + immutable snapshots are the right shape for downstream consumption.

Concerns

• Strict-by-default is a cross-cutting policy shift. Every producer HTTP caller that doesn't send bestEffort: true now receives RenderQualityError on audio_processing_failed / media_readiness_timeout / media_load_failed / sub_timeline_readiness_timeout / sub_timeline_script_failure. Previously most of these logged and produced degraded output. In-repo callers (CLI + docker path) all wire --best-effort through cleanly, but external callers (heygen-com studio, EF preview, backend services POSTing /render) will start failing renders that used to succeed with video-only output. Is downstream ready for strict-by-default, or does this need coordinated rollout (feature flag / dual-write / progressive migration)?
• Distributed render path bypasses the new policy. See inline at renderOrchestrator.ts — the audio-error branch in packages/producer/src/services/distributed/plan.ts:908-909 still uses the pre-PR log.warn("output will be video-only") pattern and does NOT call applyRenderWarningPolicy. Strictness is honored on the monolithic path but silently ignored on distributed, which defeats one of the PR's headline properties.

Nits

• data-no-timeline opt-out is a new authoring contract. Worth a line in the composition author docs / CONTRIBUTING so external composition consumers don't hit sub_timeline_readiness_timeout on non-timeline hosts.

What I didn't verify

• Whether every downstream HTTP caller of /render already sets bestEffort: true. Workspace grep turned up only in-repo CLI wiring; external heygen-com callers are out of tree from where I sit.
• Whether the captions dual-publish contract holds across all 18 style-*-prod regression fixtures once landed.

— Review by Rames D Jusso

Re-reviewed current head b9625a7206eb40ecdd71e41970b9d05f88ad896e.

The two earlier implementation blockers are addressed: terminal failure state is now fully populated before the failed snapshot is published, and distributed planning now routes audio warnings through the shared strict/best-effort policy with focused tests.

One release blocker remains: strict-by-default rollout is not ready. The external HTTP path in packages/producer/src/server.ts still interprets an omitted bestEffort as strict, while renderOrchestrator.ts turns readiness warnings into fatal errors. Required CI demonstrates the compatibility impact rather than merely suggesting it: Render on windows-latest fails because the reused-video fixture has no data-no-timeline marker and strict mode rejects the resulting sub_timeline_readiness_timeout; regression also fails, including a real style-1-prod compiler/golden timeline-layer mismatch on shard 2. There is still no guarded rollout/default migration or evidence that downstream callers which omit the new field are ready.

Please either keep best-effort as the compatibility default while callers/fixtures migrate, or land the coordinated strict rollout and make the required Windows/regression fleet green.

Verdict: REQUEST CHANGES
Reasoning: The prior correctness gaps are fixed, but strict-by-default remains an unguarded breaking rollout and required CI is red from that behavior.
— Magi

Re-reviewed rewritten head 6d1336f66b24fb3910f88921d8f04e9a005091d3 against the two prior blockers and the complete stack delta.

Both correctness issues remain fixed: terminal failure fields are populated before the immutable failed snapshot is published, and distributed audio degradation flows through the shared strict/best-effort policy. The rollout blocker is now resolved at the canonical boundaries: createRenderJob, the HTTP parser, CLI local/docker paths, and distributed planning all preserve best-effort when omitted; strict behavior requires explicit bestEffort: false, --no-best-effort, or strictness: "strict". Focused tests pin omitted/true/false behavior and the distributed strict/best-effort split.

I also checked the compiler follow-up that repaired the style-1-prod regression: mount flattening is again limited to exact composition identity while authored/runtime timeline identities remain separately registered. Local focused verification passed 168 tests across the render CLI, compiler scoping/inlining, event publisher, HTTP parser, and distributed planner. Fresh required CI is green, including Windows render/tests and all eight regression shards; cancelled entries are superseded runs with green replacements.

Verdict: APPROVE
Reasoning: The structured-outcome contracts are complete, compatibility remains best-effort by default across every public path, strictness is explicit, and the prior runtime/CI regressions are resolved with focused coverage and a fully green required fleet.

— Deepwork