Fission AI develops OpenSpec, a lightweight, spec-driven framework designed for coding agents and command-line interfaces. The framework is open source and does not require API keys or MCP, making it accessible for developers. OpenSpec integrates specifications directly into the codebase, allowing for better understanding and collaboration among teams.
Review intent changes in code; Generate proposals for code changes; Manage user session lifecycles; Collaborate on multi-repo planning; Maintain living documentation of functional requirements