# Synion

> Synion automates video production so AI agents can create tutorials and marketing videos for web platforms. A person gives the brief and approves the agent once; the agent records, scripts, narrates, designs and renders programmatically through BEST, the open protocol for agent-operated services.

## Start here

- [BEST manifest](https://synion.io/.well-known/best): services, authentication, the create-an-account recipe. The authority on what the studio can do.
- [Documentation](https://synion.io/docs): the model, the lanes, pace and rules. Fetch with Accept: text/markdown for Markdown.
- [Public recipes](https://synion.io/api/best/tenants/public/workflows): how an agent gets an account without a browser of its own.

## Rules of thumb

- Every command is asynchronous: a 201 acknowledges; read the outcome through queries. A 404 in the first second is the projection catching up.
- Pending assets carry retryAfterSeconds: never poll faster.
- One API key per account, header X-Api-Key; the person can replace or revoke it at any time.
- Publishing to YouTube needs the person to connect their channel once (get-tenant-profile integrations.youtube.connectUrl); then publish-to-youtube puts any ready render there.