m42-claude-plugins

M42 Claude Plugins

A marketplace of Claude Code plugins for modular development workflows.

Installation

Add this marketplace to Claude Code:

claude marketplace add https://github.com/mission42-ai/m42-claude-plugins

Then install individual plugins:

claude plugin install m42-planning
claude plugin install m42-sprint
claude plugin install m42-task-execution
claude plugin install m42-meta-toolkit
claude plugin install m42-signs
claude plugin install m42-dev

Or install all plugins:

claude plugin install m42-planning m42-sprint m42-task-execution m42-meta-toolkit m42-signs m42-dev

Plugins

m42-planning

Epic and story planning with GitHub integration, gherkin-based acceptance criteria, and structured issue templates.

Features:

• Epic and story planning workflows
• Gherkin acceptance criteria patterns
• GitHub issue templates (epic.yml, story.yml)
• DEEP estimation methodology

m42-sprint

Sprint orchestration with ralph-loop driven task queue processing.

Features:

• /start-sprint - Initialize new sprint
• /add-task - Add tasks to queue (issue, refactor, docs, custom)
• /run-sprint - Start ralph-loop execution
• /sprint-status - View progress dashboard
• /pause-sprint / /resume-sprint - Control execution
• /import-tasks - Bulk import from GitHub

m42-task-execution

Reusable 6-phase task execution workflow.

Features:

• 6-phase workflow (Context → Planning → Execution → Quality → Progress → Learning)
• Quality gates (build, typecheck, lint, test)
• Learning documentation
• Context caching

m42-meta-toolkit

Meta-tooling for creating and managing Claude Code artifacts (skills, commands, subagents, hooks) with quality assurance workflows.

Features:

• /create-skill - Create new skills with proper structure and frontmatter
• /create-command - Create new slash commands
• /create-subagent - Create new subagents with validation
• /create-hook - Create new hooks
• /scan-claudemd - Scan CLAUDE.md files for issues
• /optimize-claudemd - Optimize CLAUDE.md content

m42-signs

Learning extraction and management from session transcripts. Extracts wisdom from session failures and applies them as learnings in CLAUDE.md files.

Features:

• /extract - Extract learnings from session transcripts
• /review - Review extracted learnings before applying
• /apply - Apply approved learnings to CLAUDE.md files
• /add - Manually add a learning
• /list - List current learnings in backlog
• /status - View learning pipeline status

m42-dev

Development utilities for software engineers - specs, planning, and daily practice support. (Early development)

Features:

• creating-specs skill - Guide for writing effective specification files

Architecture

Workflow Plugins:
  Planning ──────────────> m42-planning
       │
       ▼
  Sprint ────────────────> m42-sprint
       │
       ▼
  Execution ─────────────> m42-task-execution

Tooling Plugins:
  Meta-tooling ──────────> m42-meta-toolkit
  Learning Loop ─────────> m42-signs
  Dev Utilities ─────────> m42-dev

Each plugin is independent but they compose together for end-to-end automation. Workflow plugins handle the planning-to-execution pipeline. Tooling plugins provide cross-cutting utilities for plugin development, learning management, and engineering practices.

Repository Structure

m42-claude-plugins/
├── .claude-plugin/
│   └── marketplace.json      # Plugin registry
├── plugins/
│   ├── m42-planning/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json
│   │   ├── skills/
│   │   │   └── epic-story-planning/
│   │   └── templates/
│   ├── m42-sprint/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json
│   │   ├── commands/
│   │   └── skills/
│   │       └── orchestrating-sprints/
│   ├── m42-task-execution/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json
│   │   └── skills/
│   │       └── task-execution/
│   ├── m42-meta-toolkit/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json
│   │   ├── commands/
│   │   ├── agents/
│   │   └── skills/
│   ├── m42-signs/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json
│   │   ├── commands/
│   │   ├── agents/
│   │   └── skills/
│   └── m42-dev/
│       ├── .claude-plugin/
│       │   └── plugin.json
│       ├── commands/
│       ├── agents/
│       └── skills/
└── README.md

License

MIT