flake: TestOpenAIResponsesFullReplayPairsReasoningAndWebSearch

[flake-investigator]

CI Run: https://github.com/coder/coder/actions/runs/25131965591
Failing Job: https://github.com/coder/coder/actions/runs/25131965591/job/73662589528 (test-go-pg (ubuntu-latest))
Commit: 70d46943db313d3b60a5166186002d5e743ac225 (Asher)

Failure:

• coderd/x/chatd TestOpenAIResponsesFullReplayPairsReasoningAndWebSearch
• Error: expected 2 OpenAI requests but recorder only had 1.
• Log snippet:

=== FAIL: coderd/x/chatd TestOpenAIResponsesFullReplayPairsReasoningAndWebSearch (0.31s)
    integration_responses_test.go:180:
        Error: "[{[map[content:You are the Coder agent — ... [map[text:search for the latest Coder docs type:input_text]] role:user]] ...}]" should have 2 item(s), but has 1

• Nearby context shows the chat being interrupted mid-processing:

processor: chat interrupted  chat_id=c7cb92e5-ac19-44a5-8e08-3661813052da

Root Cause Assessment:

• Likely flaky chatd integration test where the follow-up message does not trigger the second OpenAI Responses request, leaving only the initial request recorded.
• Searched logs for WARNING: DATA RACE, panic:, and OOM indicators; none found.

Assignment Analysis:

• Failing test location: coderd/x/chatd/integration_responses_test.go (TestOpenAIResponsesFullReplayPairsReasoningAndWebSearch, around line 180).
• Tooling does not expose git blame -L directly; used github_list_commits on the test file as a proxy for recent ownership.
• Most recent meaningful change in this file is commit 62e9752acd3212991de1c4a5da3d43bdf6da1fb9 by @ibetitsmike ("fix: prevent malformed OpenAI Responses continuations"), which introduced/updated these OpenAI Responses replay 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)
• flake: TestOpenAIResponsesChainModeStillFiresForProviderExecutedOnly #1504 (another OpenAI Responses chain-mode flake)

Reproduction:

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

[flake-investigator]

New occurrence on nightly gauntlet:

• CI run: https://github.com/coder/coder/actions/runs/25203415316
• Job: https://github.com/coder/coder/actions/runs/25203415316/job/73898869354 (test-go-pg windows-2022)
• Commit: 90bee3aaef0db957bb8189a05731705a30b1f5be (Kayla はな)

Failure snippet:

=== FAIL: coderd/x/chatd TestOpenAIResponsesFullReplayPairsReasoningAndWebSearch
    integration_responses_test.go:180:
    Error: ... should have 2 item(s), but has 1