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Category: Development & EngineeringNo API key required

git-investigate

Code investigation knowledge base. Covers code history tracking, issue introduction analysis, root cause diagnosis.

personAuthor: jakexiaohubgithub
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Git Investigate Skill

Trigger

  • Keywords: code history, git blame, track changes, who wrote this, when was it changed, root cause, code archaeology

When NOT to Use

  • Code review (use codex-review)
  • Feature development (use feature-dev)
  • Just want to read code (use Read directly)

Command

/git-investigate src/service/xxx.ts:123      # Specific line
/git-investigate processToken                 # Function name
/git-investigate "error message"              # Keyword

Workflow

Locate code -> git blame -> find commit -> trace history -> analyze changes -> report

Investigation Framework

| Question | Method | | ------------------ | ----------------------------- | | Who wrote it? | git blame | | When was it changed?| git log --follow | | Why was it changed?| commit message + PR | | What was missed? | git diff compare original vs problematic version |

Common Patterns

| Pattern | Symptom | Root Cause | | ------------------ | -------------------- | ----------------------------- | | Type removed | Enum value deleted | Assumed no longer needed | | Condition simplified| If conditions reduced| Missed during refactoring | | Rename | Partially unchanged | Incomplete search-and-replace | | Boundary ignored | Only handles main flow| Edge cases not considered |

Verification

  • Report includes: investigation target, author info, timeline, original vs problematic code
  • Root cause has clear analysis
  • Fix recommendation is specific and actionable

References

  • references/commands.md - Git command reference + report template

Examples

Input: Who changed this line of code?
Action: git blame -> find commit -> trace PR -> output report

Input: When was this bug introduced?
Action: git log -p -S -> locate introduction point -> analyze cause -> output report