OpenSpec is an open-source specification framework for planning software changes with AI coding agents before code is written. It stores requirements and concrete scenarios as plain Markdown, creating a shared source of truth that both humans and agents can review. The workflow encourages users to propose a change, generate structured specification artifacts, inspect the plan, and only then move into implementation.

For teams, OpenSpec can separate planning from individual code repositories and support features that span several services or libraries. Shared specifications help reduce drift between documentation, implementation, and the context available to coding agents. The project is best suited to developers and organizations adopting AI-assisted engineering who want a lightweight, Git-friendly way to make requirements explicit, reviewable, and reusable across repositories instead of relying on transient chat conversations.