diagnose-bug
Use when the task is to fix an existing defect or bug, rather than building a new feature.
Skill by marcelkornblum
Install
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/marcelkornblum-diagnose-bug
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
Use cases: productivity
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/diagnose-bug
What's inside
- Skill name
diagnose-bug- Description
- Use when the task is to fix an existing defect or bug, rather than building a new feature.
- License
- MIT
- Instructions
- 15 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# Instructions You are a scientific debugger. Do not guess or "vibe code" fixes. Always state your current workflow step at the start of every response. ## Core Workflow 1. **Reproduce**: Write a test or script that reliably reproduces the bug in isolation. 2. **Minimize**: Strip away irrelevant code from your reproduction case. 3. **Hypothesize**: State your hypothesis for the root cause clearly. 4. **Instrument**: Add logging/instrumentation to prove the hypothesis. 5. **Fix (Red/Green)**: Once proven, write the fix. Ensure the reproduction case now passes. 6. **Regression Test Log**: Explicitly document the reproduction test case in `docs/regressions.md` (creating it if necessary) to ensure future models understand the fix. 7. **Regression Test (Full Suite)**: Run the broader test suite. 8. **Proceed**: Once validated, activate the `commit-and-review` skill (via `activate_skill(name="commit-and-review")`).
From marcelkornblum/agentic-harness, MIT.
More from marcelkornblum/agentic-harness
- 0.491score
plan-architecture
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Use when planning a large change, a new feature, or an architectural shift.
SkillCFreshness: C★ 1Claude Code +9 - 0.491score
commit-and-review
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Use when coding is complete, tests pass, and the code needs to be committed and reviewed by the user.
SkillCFreshness: C★ 1Claude Code +9 - 0.491score
prototype-ui
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Use when generating CSS, markup, visual layouts, or UI components where TDD is not applicable.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
execute-tdd
marcelkornblum
Use for all coding tasks to enforce a strict red-green-refactor loop.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
grill-plan
marcelkornblum
Use to adversarially interrogate an architectural plan before it is broken into phases or implemented.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
prep-branch
marcelkornblum
Use to set up the Git branch before commencing coding on a small task or a new phase of a larger plan.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
manage-pr
marcelkornblum
Use to open a Pull Request and manage the transition to the next piece of work.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
spike
marcelkornblum
Use for technical exploration, learning an unknown API, or backend prototyping.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
to-issue
marcelkornblum
Use to convert conversational context, bug reports, or architectural plans into structured issues.
SkillCFreshness: C★ 1Claude Code +9 - 0.482score
template-workflow
marcelkornblum
A 1-2 sentence trigger description.
SkillCFreshness: C★ 1Claude Code +9
Signals
- Stars
- 1
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- May 22, 2026 (5 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
More from marcelkornblum
- 0.491score
plan-architecture
marcelkornblum
Use when planning a large change, a new feature, or an architectural shift.
SkillCFreshness: C★ 1Claude Code +9 - 0.491score
commit-and-review
marcelkornblum
Use when coding is complete, tests pass, and the code needs to be committed and reviewed by the user.
SkillCFreshness: C★ 1Claude Code +9 - 0.491score
prototype-ui
marcelkornblum
Use when generating CSS, markup, visual layouts, or UI components where TDD is not applicable.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
execute-tdd
marcelkornblum
Use for all coding tasks to enforce a strict red-green-refactor loop.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
grill-plan
marcelkornblum
Use to adversarially interrogate an architectural plan before it is broken into phases or implemented.
SkillCFreshness: C★ 1Claude Code +9 - 0.486score
prep-branch
marcelkornblum
Use to set up the Git branch before commencing coding on a small task or a new phase of a larger plan.
SkillCFreshness: C★ 1Claude Code +9
Cite this page
diagnose-bug skill. Agent Mart. https://agentmart.dev/skills/marcelkornblum-diagnose-bug (last updated 2026-10-24)