Spec-Driven-Development

Spec-Driven-Development addresses a growing pain as developers use multiple AI coding tools on the same codebase. The skill's ability to generate requirements.md, design.md, and tasks.md with traceable IDs (REQ-001 style) is straightforward and effective. A standout feature is the retrofitting mode for existing codebases, which uses '[TO VERIFY]' tags to flag assumptions. The auto-generated config files for Claude Code, Cursor, Windsurf, Copilot, and Aider ensure every tool reads from the same playbook. Because it's a Claude skill, you need Claude access—no standalone UI. The quality of specs depends on your interview answers; ambiguous input may yield incomplete plans. It's free and open-source, so the risk is low. Weaknesses: currently supports only five tools, no video tutorials, and relies on you to maintain discipline in reading the spec files. If you're a solo developer using one AI tool and prefer ad-hoc prompting, this may feel bureaucratic. But for teams, it's a cheap way to enforce consistency.

Spec-Driven-Development is an open-source Claude skill that solves AI coding tool contradictions by generating three shared specification files—requirements.md, design.md, and tasks.md—before any code is written. It interviews you for new projects or reverse-engineers existing codebases, producing traceable requirement IDs (e.g., REQ-001) with acceptance criteria. It also auto-creates config files (CLAUDE.md, .cursorrules, .windsurfrules, .github/copilot-instructions.md, .aider.conf.yml) that embed identical universal instruction blocks, so Claude Code, Cursor, Windsurf, GitHub Copilot, and Aider all share a single source of truth. Licensed under MIT, it's positioned as a lightweight, file-based solution for teams using multiple AI coding assistants.