debug

par anthropic

Session de débogage structurée — reproduire, isoler, diagnostiquer et corriger. Déclencher avec un message d'erreur ou une trace de pile, « ça marche en staging mais pas en prod »,…

npx skills add https://github.com/anthropics/knowledge-work-plugins --skill debug

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/debug

If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md.

Run a structured debugging session to find and fix issues systematically.

Usage

/debug $ARGUMENTS

How It Works

┌─────────────────────────────────────────────────────────────────┐
│                       DEBUG                                        │
├─────────────────────────────────────────────────────────────────┤
│  Step 1: REPRODUCE                                                │
│  ✓ Understand the expected vs. actual behavior                   │
│  ✓ Identify exact reproduction steps                             │
│  ✓ Determine scope (when did it start? who is affected?)        │
│                                                                    │
│  Step 2: ISOLATE                                                   │
│  ✓ Narrow down the component, service, or code path             │
│  ✓ Check recent changes (deploys, config changes, dependencies) │
│  ✓ Review logs and error messages                                │
│                                                                    │
│  Step 3: DIAGNOSE                                                  │
│  ✓ Form hypotheses and test them                                 │
│  ✓ Trace the code path                                           │
│  ✓ Identify root cause (not just symptoms)                      │
│                                                                    │
│  Step 4: FIX                                                       │
│  ✓ Propose a fix with explanation                                │
│  ✓ Consider side effects and edge cases                          │
│  ✓ Suggest tests to prevent regression                           │
└─────────────────────────────────────────────────────────────────┘

What I Need From You

Tell me about the problem. Any of these help:

Error message or stack trace
Steps to reproduce
What changed recently
Logs or screenshots
Expected vs. actual behavior

Output

## Debug Report: [Issue Summary]

### Reproduction
- **Expected**: [What should happen]
- **Actual**: [What happens instead]
- **Steps**: [How to reproduce]

### Root Cause
[Explanation of why the bug occurs]

### Fix
[Code changes or configuration fixes needed]

### Prevention
- [Test to add]
- [Guard to put in place]

If Connectors Available

If ~~monitoring is connected:

Pull logs, error rates, and metrics around the time of the issue
Show recent deploys and config changes that may correlate

If ~~source control is connected:

Identify recent commits and PRs that touched affected code paths
Check if the issue correlates with a specific change

If ~~project tracker is connected:

Search for related bug reports or known issues
Create a ticket for the fix once identified

Tips

Share error messages exactly — Don't paraphrase. The exact text matters.
Mention what changed — Recent deploys, dependency updates, and config changes are top suspects.
Include context — "This works in staging but not prod" or "Only affects large payloads" narrows things fast.