[tee8z]

steer_rejected_on_run_id_mismatch in crates/buzz-agent/tests/fake_llm.rs fails intermittently in CI with run-id mismatch was not rejected. It failed on #7, which does not change buzz-agent.

The test sends a prompt, then a steer with a wrong run id. It stopped reading when the prompt turn finished. The fake LLM can finish the turn before the agent handles the steer, so the steer's rejection can arrive after the turn's response.

Response order	Before	After
Steer rejection, then turn result	pass	pass
Turn result, then steer rejection	fail	pass

The test now reads until it has both responses. It still requires the steer to fail with invalid_params (-32602). The agent code does not change.

Validation

• Reproduced the CI failure at the same assertion (fake_llm.rs:1000) on a 16-core host with all CPUs saturated. The unchanged test failed 15 of 400 runs; with this change it failed 0 of 400.
• cargo fmt --all -- --check, cargo clippy -p buzz-agent --all-targets -- -D warnings, and cargo test -p buzz-agent --test fake_llm (20 passed).

Stack

Stack: layer 5 of 24. Base: #31. Next: #9. One signed commit per layer. It sits in the stack so every layer above it carries the fix.

Summary by CodeRabbit

• Tests
  • Improved coverage for steering requests with mismatched run IDs.
  • Tests now verify that the original turn completes successfully even when the steer request is rejected.

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• crates/buzz-agent/tests/fake_llm.rs

📝 Walkthrough

The run-ID mismatch steering test now checks that the steer request is rejected and the original turn completes successfully, regardless of which response arrives first.

Changes: Run-ID mismatch test

Layer / File(s)	Summary
Track and assert both outcomes crates/buzz-agent/tests/fake_llm.rs	The test tracks the original turn’s completion separately from the steer rejection. It waits for both responses and asserts both outcomes.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Other

Suggested reviewers: wpfleger96

Merge Risk: 🔵 Low · up to d81d7

The regression test can pass when the original turn fails, so the missing completion assertion should be added before relying on this test.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main test change: waiting for both responses in the run-ID mismatch steering test.
Docstring Coverage		Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
Review comments at @crates/buzz-agent/tests/fake_llm.rs:
- Line 1000: In the branch matching the response ID to p_id, validate that
result.stopReason equals "end_turn" before setting turn_done. Keep the existing
turn_done assignment only after this successful-completion assertion so JSON-RPC
error responses cannot be treated as completed turns.

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• crates/buzz-agent/tests/fake_llm.rs

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[tee8z]

CI note: this stack still hits flaky tests in code it does not change. When one of these fails here, the failure is unrelated to this PR, and a re-run usually passes.

• buzz-cli client::retry_policy_tests::exhausted_connect_failures_return_network_retryable: a parallel test can take the freed port and answer with HTTP 405.
• Desktop smoke E2E huddle-transcription.spec.ts and empty-edit-delete.spec.ts: upstream fix test: fix recurring CI flakes in desktop and Postgres lanes block/buzz#8343, backported in fix(ci): stabilize fork publishing and desktop smoke fixtures #24.
• buzz-db cluster-wide replica_fence PostgreSQL tests: fixed in fix(ci): stabilize PostgreSQL concurrency tests #31 for the layers above it.
• buzz-agent steer_rejected_on_run_id_mismatch: fixed in test(agent): wait for both responses in the steer run-id mismatch test #33 for the layers above it.
• buzz-acp adapter-spawn tests that fail with Text file busy (ETXTBSY).

Summary jobs from cancelled runs also stay red until the replacement run finishes. A failure in this PR's own code gets a fix in this PR.

@thebrandonlucas it's fine to approve without CI fully passing.