mermaid-validator

Agent Plugins

A collection of plugins for AI coding agents including Claude Code, Codex, and other agentic development tools.

Plugin Catalog

Plugin	Description	Type	Command
mermaid-validator	Validates and fixes Mermaid diagram syntax in Markdown files	Command + Agent	/mermaid-validator:check
git-workflow	Git workflow automation with Conventional Commits support	Command + Agent + Skill	/git-workflow:merge, /git-workflow:commit, /git-workflow:status, /git-workflow:sync
reviewer	Structured spec and implementation review with agent-loop handoff	Command + Agent + Skill	/reviewer:spec, /reviewer:result, /reviewer:init
digest	Summarize branches, PRs, diffs, and docs into icon-rich structured cards	Command + Agent + Skill	/digest:digest, /digest:release
ralph-loop	Continuous self-referential AI loops with session isolation	Command + Hook	/ralph-loop:ralph-loop, /ralph-loop:cancel-ralph

Getting Started

Claude Code

# Add this marketplace to Claude Code
/plugin marketplace add shdennlin/agent-plugins

# Install a plugin
/plugin install reviewer@shdennlin-plugins

# List available plugins
/plugin list shdennlin-plugins

# Update a plugin
/plugin update reviewer@shdennlin-plugins

# Remove a plugin
/plugin uninstall reviewer@shdennlin-plugins

Codex

Tell Codex to fetch and follow the install instructions for the plugin you want:

Plugin	Install command
reviewer	Fetch and follow instructions from https://raw.githubusercontent.com/shdennlin/agent-plugins/main/plugins/reviewer/.codex/INSTALL.md
git-workflow	Fetch and follow instructions from https://raw.githubusercontent.com/shdennlin/agent-plugins/main/plugins/git-workflow/.codex/INSTALL.md
mermaid-validator	Fetch and follow instructions from https://raw.githubusercontent.com/shdennlin/agent-plugins/main/plugins/mermaid-validator/.codex/INSTALL.md
digest	Fetch and follow instructions from https://raw.githubusercontent.com/shdennlin/agent-plugins/main/plugins/digest/.codex/INSTALL.md
ralph-loop	Fetch and follow instructions from https://raw.githubusercontent.com/shdennlin/agent-plugins/main/plugins/ralph-loop/.codex/INSTALL.md

Restart Codex after installation to discover the skills.

Update: cd ~/.codex/shdennlin-agent-plugins && git pull — skills update instantly through the symlink.

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for guidelines.

Adding a New Plugin

1. Create a new directory under plugins/
2. Follow the standard plugin structure:

   plugins/your-plugin/
   ├── .claude-plugin/
   │   └── plugin.json
   ├── .codex/
   │   └── INSTALL.md   # (optional) - Codex installation guide
   ├── commands/        # (optional) - slash commands
   ├── agents/          # (optional) - proactive agents
   ├── hooks/           # (optional) - event hooks
   ├── skills/          # (optional) - auto-discovery skills
   └── README.md
   

3. Add your plugin to .claude-plugin/marketplace.json
4. Update this README's plugin catalog
5. Submit a pull request

License

MIT License - see LICENSE for details.

Author

shdennlin - GitHub

Resources

• Claude Code Documentation
• Plugin Development Guide
• Marketplace Documentation