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debug

Finds the root cause of a bug methodically.

Skill by YauhenBichel

IndexedApache-2.0
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/yauhenbichel-debug

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Finds the root cause of a bug methodically. Use for errors, crashes, wrong results or flaky behaviour.

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What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/debug

What's inside

Skill name
debug
Description
Finds the root cause of a bug methodically. Use for errors, crashes, wrong results or flaky behaviour.
License
Apache-2.0
Instructions
25 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

## Steps
1. Reproduce the bug with the smallest input. Run `pytest tests/test_bug.py` or the exact failing command in isolation.
2. Read the full error and stack trace. Record the exception type, file path, and line number.
3. Form one hypothesis. Test it using logs, a debugger, or `git bisect`. Do not guess.
4. Find the root cause, not the symptom. Verify the failing condition matches your hypothesis.
5. Write a failing test that captures the exact failure. Run it to confirm it fails.
6. Apply the fix. Run the full test suite. Show the new test passing and existing tests green.
7. Scan related code paths. Note what else the cause may affect and log follow-up tasks.

## Checklist
- [ ] Reproduction is minimal and deterministic
- [ ] Full stack trace and error context are captured
- [ ] Single hypothesis tested with evidence
- [ ] Root cause identified, not a symptom workaround
- [ ] Failing test written and confirmed to fail before the fix
- [ ] Fix applied and all tests pass
- [ ] Related code paths reviewed for side effects

## Output
- Minimal reproduction command or test case
- Root cause explanation with file and line reference
- Failing test code and the applied fix
- List of affected code paths or follow-up tasks

From YauhenBichel/engineering-skills, Apache-2.0.

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Last commit (this folder)
Oct 9, 2026 (19 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
Apache-2.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

More from YauhenBichel

Cite this page

debug skill. Agent Mart. https://agentmart.dev/skills/yauhenbichel-debug (last updated 2026-10-24)