[CI Failure Doctor] CI Failure Investigation - Run #37920

[github-actions]

Summary

Run 37920 failed because the Integration: Workflow Features job could not download actions/setup-go and the canary_go coverage guard reported 69 tests that were not executed in CI.

Failure Details

• Run: 22447253006
• Commit: 32ebb84
• Trigger: push

Root Cause Analysis

1. The Integration: Workflow Features job never reached the go test step because the runner repeatedly timed out while downloading https://api.github.com/repos/actions/setup-go/tarball/4dc6199c7b1a012772edbd06daecab0f50c9053c. After three retries the HttpClient timed out at 100s and the action download step failed.
2. The downstream canary_go job aggregates all-tests.txt (4,736 tests) and executed-tests.txt (4,667 tests) and runs ./scripts/compare-test-coverage.sh. The script reports 69 missing tests such as TestAdditionalClaudeToolsIntegrationWithCreatePullRequest, TestAllowGitHubReferencesEnvVar, TestAgenticWorkflowsPermissionValidation, etc., which are defined under pkg/workflow but were not executed by any CI job, so the guard fails.

Failed Jobs and Errors

• Integration: Workflow Features – actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c download timed out after the HttpClient.Timeout (100s) elapsed, aborting the job before tests started.
• canary_go – ./scripts/compare-test-coverage.sh all-tests.txt executed-tests.txt failed because 69 tests defined in _test.go files were not recorded in any integration artifact (the log lists the first 20 missing tests before truncating).

Investigation Findings

• scripts/list-all-tests.sh enumerates 4,736 tests while scripts/extract-executed-tests.sh returns 4,667 names from the test-result artifacts, so compare-test-coverage.sh reports 69 missing names and prints the first 20 (including TestClaudeCanAccessGitHubTools, TestBashFalseWithPROperationsInjectsGitCommands, TestCreatePullRequestWithBranchSlash, etc.).
• Those missing tests all live under pkg/workflow and carry the //go:build integration tag, so they should be run by the integration matrix but currently are not covered by any pattern or catch-all invocation that emits JSON output.
• Reproducing the failure locally is possible by downloading the integration artifacts, running ./scripts/list-all-tests.sh > all-tests.txt, running ./scripts/extract-executed-tests.sh test-results > executed-tests.txt, and then running ./scripts/compare-test-coverage.sh all-tests.txt executed-tests.txt to see the same “❌ FAILURE” message.

Recommended Actions

• Re-run the workflow to see if the actions/setup-go download error was transient; if it keeps failing then escalate to GitHub infra or vendor/cache the action tarball so the integration job does not sit behind repeated HttpClient.Timeout errors.
• Update the integration matrix (patterns or additional job) so that the missing pkg/workflow integration tests listed above are executed and produce JSON artifacts, then re-run canary_go to prove compare-test-coverage.sh succeeds.

Prevention Strategies

• Add monitoring for repeated actions/setup-go download failures and consider vendoring or caching the action when external downloads hit the HttpClient timeout threshold.
• When adding new integration tests, simultaneously update the matrix or the coverage guard so that canary_go is aware of the new tests and they show up in the extracted artifacts.

AI Team Self-Improvement

• Before shipping new integration tests, run ./scripts/compare-test-coverage.sh locally so that you can expand the matrix as needed and prevent canary_go from failing.
• When referencing external actions such as actions/setup-go, prefer release tags or add retries/fallbacks so that CI does not abort when the HttpClient timeout is reached.

Historical Context

No existing [CI Failure Doctor] issue was found that already tracks this run or the same combination of failures.

🩺 Diagnosis provided by CI Failure Doctor

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• expires on Feb 27, 2026, 3:16 PM UTC