ENGINEERING
Auto-quarantine tests that fail then pass on rerun
When a GitHub Actions job fails and a retry of the same commit passes, it identifies the offending test, opens a PR that adds a skip/quarantine annotation.
How it runs
The automated pipeline, trigger to output.
- TriggerGitHub workflow_run completed eventGitHub
- LogicDetect fail-then-pass retry on the same commit
- ActionOpen PR adding the quarantine annotationGitHub
- ActionFile Linear issue to track the fixLinear
- OutputNotify code owner in Slack with the PRSlack
What it does
Turns the classic 'failed, hit retry, went green' signal into automatic quarantine. It compares the failing and passing attempts of the same workflow run, isolates the test that flipped, and proposes a code change that marks it as quarantined so it stops blocking unrelated PRs while a fix is pending.
When to use it
Use it on busy trunk-based repos where a single intermittent test can stall every merge. Best when your test framework supports a skip or quarantine annotation and you want a human to still approve the PR.
How it works
- 1A GitHub workflow_run completion event triggers the flow.
- 2A logic step checks whether an earlier attempt failed while a later attempt of the same SHA passed; non-matching events stop here.
- 3It diffs the attempt results to pin down the exact test that flipped.
- 4It opens a GitHub PR adding the quarantine annotation and a link back to the evidence.
- 5It files a Linear issue to track the underlying fix and links the PR.
- 6It pings the code owner in Slack with the quarantine PR for review.
Set it up
What you configure once, before turning it on.
- 1Connect GitHubRepos, issues, pull requests, actions.
- 2Connect LinearIssues, projects, cycles, triage.
- 3Connect SlackChannels, DMs, threads, mentions.
- 4Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 5Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 6Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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