anthropics/debug
engineering/skills/debug/SKILL.md
Structured debugging session — reproduce, isolate, diagnose, and fix. Trigger with an error message or stack trace, "this works in staging but not prod", "something broke after the deploy", or when behavior diverges from expected and the cause isn't obvious.
$ install --global
skillsauthnpx skillsauth add anthropics/knowledge-work-plugins debugInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 4, 2026, 2:15 PM4.1s1 file scanned
SKILL.md
- name:
- debug
- description:
- Structured debugging session — reproduce, isolate, diagnose, and fix. Trigger with an error message or stack trace, "this works in staging but not prod", "something broke after the deploy", or when behavior diverges from expected and the cause isn't obvious.
- argument-hint:
- <error message or problem description>
/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.
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