# Specifica Playground

> A free, browser-only playground for writing Specifica specs by chatting with an AI, then handing them to a coding agent. Specifica is an open, Git-native spec format in plain markdown, by Cognium Labs: https://specifica.org (format reference: https://specifica.org/format.md).

- Start from an example (CRM, expense approval) at Simple size and level it up to Medium and Large; each level-up shows its changes.
- Ask for changes in chat: each change applies at once to principles.md, spec.md, design.md or tasks.md, with Undo.
- Export: download the `.specifica/` folder as a zip (with SKILL.md for agents), copy it for Claude Code, Cursor or any agent, or share it as a link that holds the files.
- No sign-up and no server: the workspace stays in the browser; chat uses the visitor's own OpenRouter or OpenAI-compatible key, sent only to that endpoint.

## Links

- [Specifica format](https://specifica.org/format.md): structure, files and conventions
- [Specifica for LLMs](https://specifica.org/llms.txt)