# DETECT_UNSUPPORTED_FRAMEWORK

**What it means.** The framework in this project is not supported yet.

**What to do.** Supported today: Next.js, Express, Hono, Fastify, any Node app with a start script that listens on process.env.PORT, Django, Flask, FastAPI, Vite, Spring Boot and Rust. Convert the app to one of those and deploy again.

- HTTP status: 422
- Retryable after applying the fix: yes

Every failure from the CLI or an MCP tool has this shape:

```json
{
  "ok": false,
  "code": "DETECT_UNSUPPORTED_FRAMEWORK",
  "message": "The framework in this project is not supported yet.",
  "fix": "Supported today: Next.js, Express, Hono, Fastify, any Node app with a start script that listens on process.env.PORT, Django, Flask, FastAPI, Vite, Spring Boot and Rust. Convert the app to one of those and deploy again.",
  "file": "<where to edit, when known>",
  "retryable": true,
  "docs": "https://docs.uarpie.app/errors/DETECT_UNSUPPORTED_FRAMEWORK"
}
```

Apply `fix` (edit `file` when it is given), then run the same command again.