# Git Diff

> Display git changes in GitHub-style unified diff format with colored terminal output. Shows both staged (--cached) and unstaged changes with two-column line numbers, red/green highlighting, and chunk markers. Use when reviewing code changes, preparing commits, or comparing file modifications. Triggers on "git diff", "show changes", "what changed", or "review diff".

- Skill: `majiayu000/git-diff` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/git-diff`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/git-diff/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/git-diff

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# git-diff

Display git changes in GitHub-style unified diff format.

## Execution

Run the Python script to display formatted diff:

```bash
python3 scripts/github_diff.py [optional-path]
```

## Output Format

- **File headers**: Dark background with filepath
- **Line numbers**: Two columns (old | new)
- **Deletions**: Red background with `-` marker
- **Additions**: Green background with `+` marker
- **Context**: Neutral with both line numbers
- **Chunk markers**: Cyan `@@ -n,m +n,m @@` headers

## Sections

1. **Staged Changes** (`git diff --cached`) - shown first if present
2. **Unstaged Changes** (`git diff`) - working directory modifications

## Examples

```bash
# Show all changes
python3 scripts/github_diff.py

# Filter by path
python3 scripts/github_diff.py src/components/
```

## Requirements

- Python 3.6+
- Git installed and in PATH
- Terminal with ANSI color support