OpenSpec is a command-line tool plus a set of slash commands that make an AI coding agent write a reviewable plan — proposal, requirements with scenarios, design and task list — before it changes any code. Use when a user asks to set up spec-driven development, run openspec init, propose a change with /opsx:propose, write a spec before coding, validate or archive an OpenSpec change, or keep requirements in the repository for Claude Code, Codex, Gemini CLI or Cursor.
