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Slowest Tests

Category: General  ·  Sub-category: general-misc  ·  Last updated:
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.

From the source SKILL.md

Args: [N] [#channel] — both optional. N defaults to 500. If #channel is omitted, just print the table and stop.

What this skill does

Slowest Tests is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/slowest-tests/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when asked to find slow CI tests, "what's making CI slow", or to post a slow-test report to Slack.

Who uses this skill

The Slowest Tests Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/slowest-tests
curl -L https://claudskills.com/skills/slowest-tests/SKILL.md \
  -o ~/.claude/skills/slowest-tests/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/slowest-tests/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/slowest-tests/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\slowest-tests\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

Attribution & license

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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