[SivaKesava1]

smoke-claude-sub-agents (added in #70671) fails on main on every run, although the fix it covers works. Its last post-step check expects the worker's assistant messages in Claude Code's stream-json output, but Claude Code 2.1.296 emits only the worker's prompt (a user record with parent_tool_use_id), never its assistant messages.

Evidence: run 39536972987 on main (15d31e5375)

• model.resolution: marker-worker small → claude-haiku-5-5, resolved (Anthropic).
• The worker is registered, invoked first, completes and returns the marker. subagent.configured is claude-haiku-5-5, with no general-purpose fallback.
• The proxy served 1 × claude-haiku-5-5 (200) and 3 × claude-sonnet-5 (200).
• The run fails anyway: marker-worker messages were not served by claude-haiku-5-5. The stream has 4 assistant records, all from the main agent.

Change: take the served model from the proxy instead of child stream messages.

• At least one request on the resolved model, and all of them with status 200.
• The main agent never used that model.

Detection and routing are off in this smoke, so those requests can only come from the worker. The test fixture now uses the record shape Claude Code actually emits, instead of an invented child assistant message. Its cases cover: the main agent on the worker's model (ambiguous), no request on the model, and a failed request on the model.

Verification

• The new post-step replayed against run 39536972987's real artifacts passes. The old one fails with the error above.
• smoke_claude_sub_agents.test.cjs: 6/6 pass.
• The lock file was recompiled with a build of main, and only this workflow changed.

Only smoke-claude-sub-agents.md, its lock file and its test change.

[Copilot]

🟡 Changes recommended

Failed proxy requests are absent from the usage log, so the new assertion and fixture do not verify the promised failure condition.

1 open issue

• Verify non-2xx requests via upstream-errors log, not usage log · New

What changed in this PR

Updates gh-aw’s Claude sub-agent smoke test to verify the served model through proxy evidence rather than unavailable child assistant messages.

Changes:

• Checks proxy requests and excludes ambiguous main-agent model usage.
• Updates stream fixtures and negative cases.
• Regenerates the compiled workflow.

File	Description
actions/​setup/​js/​smoke_claude_sub_agents.test.cjs	Updates fixtures and assertion cases.
.github/​workflows/​smoke-claude-sub-agents.md	Uses proxy evidence for served-model checks.
.github/​workflows/​smoke-claude-sub-agents.lock.yml	Synchronizes generated checks and metadata.

_{Review effort: Max}

[SivaKesava1]

Verified at 01158e7268

• Branch smoke: smoke-claude-sub-agents passes on 39539347303 (01158e7268) and 39537705319 (ee0482ef1a). marker-worker resolved small → claude-haiku-5-5 and passed every check.
• Replay: the new post-step, run against the real artifacts of the failing main run 39536972987, passes. The old one fails there with marker-worker messages were not served by claude-haiku-5-5.
• Copilot code review: its one finding was valid and is fixed in 01158e7268, with the thread resolved. AWF v0.28.70 writes only 2xx responses to token-usage.jsonl, so failed worker requests are now read from upstream-errors.jsonl.
• Tests and CI: smoke_claude_sub_agents.test.cjs passes 6/6, and all 14 CI checks pass. Only smoke-claude-sub-agents.md, its lock file and its test change.