OpenSkillIndex← back to search
claude-codedevelopment

Claude-skill-registry codex-debug

Use for systematic debugging and root cause analysis with Codex. Triggers on "codex debug", "codex root cause", "have codex investigate this bug", "codex find the issue".

install
source · Clone the upstream repo
git clone https://github.com/majiayu000/claude-skill-registry
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/codex-debug" ~/.claude/skills/majiayu000-claude-skill-registry-codex-debug && rm -rf "$T"
manifest: skills/data/codex-debug/SKILL.md
tags
#debugging#root-cause#codex#issue-analysis#bug-fixing
source content

Codex Debug Skill

Systematic debugging and root cause analysis with Codex (gpt-5.2).

When to Use

  • Debugging complex bugs
  • Finding root causes of issues
  • Investigating mysterious errors
  • Performance issue diagnosis
  • Race conditions or timing issues

Reasoning Level

xhigh (debugging requires deep analysis)

Execution

  1. Gather all relevant information:
    • Error messages
    • Stack traces
    • Relevant code files
    • Reproduction steps
  2. Formulate a debugging prompt: 
    Debug this issue systematically.

Issue: <description>

Error/Symptoms:
<error messages, behavior>

Relevant Code:
<file contents>

Please:
1. Identify possible causes
2. Analyze each potential root cause
3. Determine the most likely cause
4. Suggest a fix
  3. Run: 
    codex exec -c model_reasoning_effort="xhigh" "<prompt>"
  4. Return the debugging analysis with fix recommendation

Response Format

**Codex Debug Analysis:**

**Issue Summary:**
[What's happening]

**Root Cause Investigation:**
[Step-by-step analysis of potential causes]

**Most Likely Cause:**
[Primary hypothesis with evidence]

**Recommended Fix:**
[Specific fix with code if applicable]

**Session ID:** [id]