flake: TestGetWorkspaceConn_StatusCheck (CacheHitHealthyAgent)

[flake-investigator]

CI Run

• https://github.com/coder/coder/actions/runs/25477222206
• Failed job: test-go-pg (windows-2022) (https://github.com/coder/coder/actions/runs/25477222206/job/74753187290)

Commit

• SHA: ef0151601e4a282190516b2c064b3ca3c73fbd0c
• Author: Ethan

Failure

=== FAIL: coderd/x/chatd TestGetWorkspaceConn_StatusCheck/CacheHitHealthyAgent (0.00s)
    chatd_internal_test.go:4371:
        Error:      Received unexpected error:
                    workspace agent is disconnected and cannot execute tools.

Error Analysis

• The CacheHitHealthyAgent subtest expects the cached agent connection to be reused for a healthy agent, but getWorkspaceConn returned errChatAgentDisconnected instead.
• This indicates the cache-hit status check path classified a healthy agent as disconnected.
• No panic/OOM indicators found in the job logs. No data race warnings observed.

Root Cause Assessment

Likely flaky timing in the cache-hit status check: the health check path occasionally marks a recently connected agent as disconnected under Windows CI load.

Assignment Analysis

Intended blame command:

• git blame -L 4221,4325 coderd/x/chatd/chatd_internal_test.go

Proxy via history (available tooling):

• git log --oneline -10 --follow coderd/x/chatd/chatd_internal_test.go
  • Most recent substantive changes in this file include 0bfb9f6 feat: show agent turn summary in agents sidebar (Michael Suchacz).

Assigning to @ibetitsmike as the most recent owner of this test file. (Line-level blame unavailable in current tooling.)

Related Issues

Searched in coder/internal:

• TestGetWorkspaceConn_StatusCheck
• GetWorkspaceConn
• CacheHitHealthyAgent
• workspace agent is disconnected

No existing issues found.

Reproduction

go test ./coderd/x/chatd -run TestGetWorkspaceConn_StatusCheck -count=1