PROSE
Build agentic primitives for GitHub Copilot.
Skills, Custom Agents, Instructions, and Hooks — designed with proven architectural patterns, bundled into plugins, and shipped on marketplaces. Hands-on. Copilot-native. Practitioner-tested.
The book teaches the discipline. This site shows you how to ship it in Copilot.
The Agentic SDLC Handbook is the in-depth reference for PROSE — the seven primitive types, the load lifecycle, the architectural patterns, the methodology. This site is the practitioner's playbook: how to author Skills, Custom Agents, Instructions, and Hooks for Copilot, bundle them as plugins, and distribute them. Theory there. Practice here.
What you'll find here
Skills
The new entrypoint. Description-driven activation. (Chatmodes are deprecated.)
Custom Agents
Specialist personas with tool boundaries. Sub-agents you can dispatch.
Instructions
Scoped conventions per file or directory.
Hooks
Event-driven automation on dev events.
Plugins
Bundle primitives, ship them on marketplaces.
Patterns
The architectural and design-pattern vocabulary that makes primitives durable — grounded in the Rosetta Stone chapter and the genesis skill.
Browse the existing material
PROSE Spec · The Practice · Getting Started · Tooling · Team Adoption