diagnosing-bugs: Claude Code skill

What it does

Reproduces a hard bug with one failing command before fixing it, then adds a regression test.

The description Claude matches your request against: Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.

When to use it

Something is broken, flaky or slow and the cause isn't obvious.

How to start it

Automatic, or /diagnosing-bugs

Claude loads it by itself when your request matches, so you rarely need the command. The suggester plugin also points it out when it fits.

Install

diagnosing-bugs is part of the coding plugin. Install just that plugin in Claude Code:

/plugin marketplace add iatee/claude-skills
/plugin install coding@iatee-skills
/reload-plugins

Or install the whole collection:

/plugin marketplace add iatee/claude-skills
/plugin install all@iatee-skills
/reload-plugins

New to this? Using skills explains what a skill is and how installing works.

Credit

Made by Matt Pocock, licensed MIT. Claude Skills is an unofficial, personal collection, not affiliated with or endorsed by Anthropic.

More in the coding plugin

• code-review: Reviews changes on two axes: your repo's coding standards and what the spec asked for.
• codebase-design: Shared vocabulary for designing deep modules with small interfaces.
• implement: Builds a spec or ticket test-first, then reviews and commits it.
• implement-spec: Builds a whole spec with parallel sub-agents and opens one pull request.
• improve-codebase-architecture: Scans a codebase for places to simplify and shows them as a visual report.
• playwright-cli: Drives a real browser from the terminal: open pages, click, fill forms, take screenshots.
• resolving-merge-conflicts: Resolves a merge or rebase conflict by finding out why each side changed.
• setup-pre-commit: Adds Husky pre-commit hooks for formatting, type checks and tests.
• tdd: Test-driven development, one red-green step at a time.
• wizard: Writes an interactive script that walks you through steps only a human can do.

All skills in the catalog