OpenSpec

What it does

OpenSpec focuses on spec-driven development for AI assistants: define intent, break work into scoped changes, and keep implementation tied to acceptance criteria.

Best fit

Teams that want AI agents to code from explicit requirements.

Capabilities

• Write and maintain feature specs before implementation starts.
• Break product intent into requirements, tasks, and acceptance criteria.
• Give coding agents a stable reference so they do not invent scope mid-task.
• Use specs as review material when checking AI-generated diffs.

Use cases

• Turn a feature idea into scoped implementation tasks.
• Write acceptance criteria before asking an agent to edit files.
• Ask the agent to implement only the approved spec section.
• Use it before PR review to compare what was requested with what changed.

Source

Fission-AI/OpenSpec