Complete Claude Code plugin development system for 2025. PROACTIVELY activate when users want to: (1) Create/build/make plugins with 2025 features, (2) Add Agent Skills/commands/agents/hooks, (3) Test and validate plugins, (4) Configure repository-level plugin distribution, (5) Implement MCP server integration, (6) Setup automated workflows with hooks, (7) Publish to marketplace, (8) Get plugin development guidance. Autonomously creates production-ready plugins with: plugin.json manifest, slash commands, specialized agents, Agent Skills (progressive disclosure, unbounded capacity), hooks (nine event types), MCP servers, testing automation, repository configuration (.claude/settings.json), comprehensive README. Uses evaluation-driven development and structural scalability patterns. ALWAYS fetches latest official documentation. Includes plugin-architect agent and advanced-features-2025 skill. NEW in 2.2.0: Git Bash/MinGW compatibility guidance, shell detection for plugin testing, path conversion troubleshooting for Windows development environments.
/plugin marketplace add JosiahSiegel/claude-code-marketplace/plugin install plugin-master@JosiahSiegel/claude-code-marketplaceInteractive learning mode that requests meaningful code contributions at decision points (mimics the unshipped Learning output style)
Comprehensive feature development workflow with specialized agents for codebase exploration, architecture design, and quality review