github/spec-kit
Python
Shell
MarkdownGitHub's open-source toolkit for spec-driven development: the specify CLI turns a spec into a plan and tasks that AI agents (Claude Code, Copilot, Gemini, Codex) execute, instead of starting from the prompt.
Why it's interesting
It shifts the center of gravity from the prompt to the spec: you describe what and why, the agent builds from a verifiable plan. A concrete way to bring discipline to vibe coding.