spec-driven-development Tools

ThinkRail is an agentic IDE that customizes itself around your workflow. It solves the problem of agent-assisted development creating a mess in your main branch by isolating each agent's work into its own git worktree workspace. It's built spec-first, maintaining a connected graph of project specs that agents can actually read and use. It's for developers who want to pair with AI agents across code, terminals, and diffs without sacrificing project integrity or their main branch.

OpenSpec is a framework for creating and managing software specifications. It solves the problem of drift between requirements and implementation, especially when working with AI coding assistants, by keeping everyone aligned on the 'what' and verifying the 'how'. It's for development teams and individual developers who use AI coding tools like GitHub Copilot, Claude Code, and Cursor to ensure they build the right thing correctly.