Find the top-N slowest test files from BuildKite CI runs.
npx skills add https://github.com/oven-sh/bun --skill slowest-tests
Please help me install this Agent Skill. Skill: slowest-tests Source: https://github.com/oven-sh/bun/tree/main/.claude/skills/slowest-tests Command: npx skills add https://github.com/oven-sh/bun --skill slowest-tests
Find the top-N slowest test files in CI from a recent BuildKite run, optionally posting the results to a Slack channel as a formatted table. Use when asked to find slow CI tests, "what's making CI slow", or to post a slow-test report to Slack.
Run the script to fetch the latest finished BuildKite CI data and output the top-N slowest tests; optionally post results to Slack.
High-intent search queries and answers about installing and using this skill.
You can identify CI bottlenecks by listing slow tests from recent BuildKite runs. The Skill gathers timing data from BuildKite logs, computes the maximum duration per file across platforms, and outputs a ranked list of the slowest test files.
Yes, the Skill optionally posts slow test reports to Slack. It formats the top-N slowest test files into a table with per-file durations and platform tags, then sends the summary directly to a specified Slack channel.
Test durations are calculated by gathering timing data from BuildKite CI logs and computing the maximum duration per test file across different platforms. This ensures the reported bottleneck reflects the worst-case performance for each test.
The best way to diagnose CI slowness in merged PR builds is to analyze BuildKite CI logs to find the top-N slowest test files. This highlights the specific tests causing delays so you can plan targeted optimizations.
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