What it is — A lightweight, spec-driven framework that has a coding agent draft a proposal, design decisions, and tasks before writing any code, then keeps that spec as living documentation in the repo.

Key points

• Specs live in the repo alongside code — persistent context that survives across chat sessions and onboards new team members, instead of dying with the conversation.
• Generates proposal docs, design decisions, tasks, and spec deltas up front, aiming for faster review cycles than reviewing generated code line by line.
• Works across 30+ coding agents (Claude, Cursor, Copilot, Gemini CLI, and others) with no API key or custom protocol required.