Diagnosing Bugs
Systematically diagnose bugs using the scientific method: hypothesis, experiment, conclusion.
Process
- Reproduce — Can you make the bug happen reliably?
- Observe — What exactly happens vs. what's expected?
- Hypothesize — What could cause this behavior?
- Experiment — Test one hypothesis at a time.
- Conclude — What did the experiment prove or disprove?
- Fix — Now that you know the cause, fix it.
- Verify — Confirm the fix works and doesn't break other things.
Rules
- One hypothesis at a time.
- Don't skip reproduction.
- Don't guess — test.
- Document what you learned.
Credit
This skill is based on the work of Matt Pocock (@mattpocock). Original source: mattpocock/skills. Licensed under MIT.
How to use?
1. Download
Go to the AGENT KD SKILL gallery and find this skill card. Click Download to save the SKILL.md file to your computer.
2. Install
Copy the downloaded SKILL.md into your agent's skills directory:
| Agent | Path |
|---|---|
| opencode | ~/.config/opencode/skills//SKILL.md |
| Claude Code | ~/.claude/skills//SKILL.md |
| Codex CLI | ~/.codex/skills//SKILL.md |
| Cursor | ~/.cursor/skills//SKILL.md |
| Gemini CLI | ~/.gemini/skills//SKILL.md |
Example for opencode:
ash mkdir -p ~/.config/opencode/skills/<skill-name> cp SKILL.md ~/.config/opencode/skills/<skill-name>/SKILL.md
3. Use
Restart your agent session. The skill will auto-load based on its description. You can also invoke it explicitly by typing @ in your agent.
4. Verify
Ask your agent something related to the skill's purpose. If it responds using the skill's instructions, you're all set.