Sindri Extension Development Guide

What's New: Extension Capabilities System

Recent Addition (Jan 2026): Sindri now supports an optional capabilities system for advanced extensions:

• Project Initialization - Commands to set up new projects (project-init)
• Multi-Method Authentication - Support both API key and CLI auth (auth)
• Lifecycle Hooks - Pre/post install and project-init hooks (hooks)
• MCP Integration - Register as Model Context Protocol servers (mcp)

Most extensions don't need capabilities - they're only for extensions that extend project management functionality (like Claude Flow, Agentic QE, Spec-Kit). Regular extensions (nodejs, python, docker) work exactly as before.

Slash Commands (Recommended)

For reliable extension creation with all documentation updates, use these commands: