# Cfg Diff

> Compare configuration files, highlight differences, and suggest merge strategies for YAML, JSON, TOML, and INI formats.

- Skill: `dvcrn/cfg-diff` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add dvcrn/cfg-diff`
- Raw SKILL.md: https://api.skillmd.com/api/skills/dvcrn/cfg-diff/raw
- Safety review: pending (external: skill-scanner PASS, skillspector CAUTION)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: dvcrn (https://skillmd.com/u/dvcrn)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/dvcrn/cfg-diff

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# Config Diff

Compare and merge configuration files.

## Capabilities

- **Diff**: Side-by-side or unified diff of config files
- **Semantic Diff**: Understand structure (not just text) for YAML/JSON/TOML
- **Merge Suggestions**: Propose how to merge conflicting configs
- **Format Support**: YAML, JSON, TOML, INI, env files

## Usage

Ask the agent to:
- "Compare config.yml and config.production.yml"
- "What changed between these two JSON configs?"
- "Help me merge these two TOML files"
- "Show differences between .env.local and .env.production"

## How It Works

Uses `diff`, `jq`, `yq`, and text analysis:

```bash
diff --unified config-a.yml config-b.yml
jq -S . a.json > /tmp/a.json && jq -S . b.json > /tmp/b.json && diff /tmp/a.json /tmp/b.json
```

## Requirements

- `diff` (pre-installed)
- Optional: `jq` for JSON, `yq` for YAML
- No API keys needed