flake: TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly

[flake-investigator]

CI Run: https://github.com/coder/coder/actions/runs/25060745771
Failing Job: https://github.com/coder/coder/actions/runs/25060745771/job/73413841030 (test-go-race-pg)
Commit: 1926b7e6586d1e1fd24548f1d17f9e53061d7d78 (Mathias Fredriksson)

Failure:

• coderd/x/chatd TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly
• Error: "[]" should have 1 item(s), but has 0
• Log snippet:

=== FAIL: coderd/x/chatd TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly (0.10s)
    integration_responses_test.go:328:
        Error: "[]" should have 1 item(s), but has 0

Root Cause Assessment:

• Likely flaky chatd integration test where the follow-up message does not trigger the OpenAI Responses request, leaving the recorder empty.
• No WARNING: DATA RACE, panic, or OOM indicators found in the test-go-race-pg logs.

Assignment Analysis:

• Failing test location: coderd/x/chatd/integration_responses_test.go (TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly).
• git log --oneline -10 --follow coderd/x/chatd/integration_responses_test.go shows the most recent meaningful change as 62e9752acd3212991de1c4a5da3d43bdf6da1fb9 by @ibetitsmike ("fix: prevent malformed OpenAI Responses continuations"), which added/updated these OpenAI Responses chain-mode tests.
• Assigning to @ibetitsmike based on most recent test-file changes in this area.

Related Issues:

• flake: TestOpenAIResponsesNoStaleWebSearchReplay #1501 (similar OpenAI Responses replay flake in same file)

Reproduction:

• GOWORK=off go test ./coderd/x/chatd -run TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly -count=1

[flake-investigator]

New related occurrence in https://github.com/coder/coder/actions/runs/25104848317 (job https://github.com/coder/coder/actions/runs/25104848317/job/73563372417, test-go-pg-17) on commit dd49a818f9618c23005eef54407a6474a5be8496 (Mathias Fredriksson).

Failure variant:

=== FAIL: coderd/x/chatd TestOpenAIResponsesChainModeSkipsWhenLocalCallPending (0.25s)
integration_responses_test.go:246: Error: "[]" should have 1 item(s), but has 0

Looks like the same chain-mode response-recording flake pattern as this issue (empty OpenAI response recorder). No data race warnings, panics, or OOM indicators observed in the logs.