OpenSpec
A lightweight spec-driven framework for coding agents and CLIs
OpenSpec is a lightweight, spec-driven framework designed for coding agents and CLIs that requires no API keys or MCP setup. It generates spec deltas with each change, capturing requirement modifications so developers and reviewers can quickly understand what changed at a high level without digging through code. The project is open source and aims to be universal across different tooling ecosystems.
Each change produces a spec delta that captures the difference in system requirements, giving developers and reviewers a structured, human-readable summary of what changed.
software developers and engineering teams using coding agents or CLIs
Background.
- Status
- launched
- Business model
- open-source
Similar projects.
Editorial take on the space this project sits in — momentum signals, adjacent moves, our call on whether the wedge is real. Get pinged when we publish a new read or when the landscape shifts.
Have a take on this space?
Tell us what you’d build differently, where you think the incumbents miss, or what we’ve gotten wrong about this project. Comments + reactions are coming soon.