We make self-hosted products and the open-source TypeScript they are built on. Every layer we wrote is published, MIT licensed, and on GitHub.
Products
Each runs on your own hardware from a Docker image. rhapsode started as deadair’s speech layer, and became its own server when nothing else did the job.
An AI radio station you run yourself.
It picks the records, writes what the presenter says between them, speaks it in that presenter’s voice, and streams the result. One running order, and everybody hears the same thing at the same moment.
One contract, many TTS models.
A speech server you run yourself. Install the engines you want, and every client talks to one HTTP API that says honestly what each engine can do. Ollama, but for speech.
Your own art on a Samsung Frame TV.
Finds the Frames on your network, pairs with them, and manages what they show over the TV’s local art-mode protocol. No phone app and no cloud account in between.
Toolkits
Pulled out of the products as soon as a second one needed them, and published so anyone can build on them too.
Define an API once, in a file you can read aloud.
Generate the parts you would otherwise keep in sync by hand: Zod schemas, a Koa or Fastify router, SDK clients in TypeScript, Python, Kotlin, Swift and C#, an OpenAPI document, Markdown docs and a Bruno collection.
The parts of a Node.js server you should not write twice.
A modular set of TypeScript packages: configuration from files and secret stores, authentication with passkeys, one-time codes and sessions, permissions, caching, jobs and an event bus, on Koa or Fastify with Kysely underneath.
A lightweight, type-safe dependency injection container.
Singleton, transient and scoped lifetimes, disposal, and a container that validates its registrations before anything resolves. Runs in Node and the browser.
contract Pet: {
id: readonly uuid
name: string
status: enum(available, pending, sold) = available
}
operation /pets/{id}: {
params: { id: uuid }
get: { # fetch a pet
sdk: getPet
response: {
200: { application/json: Pet }
404:
}
}
}
A ContractKit file. The router, the validation, the clients in five languages and the OpenAPI document are all generated from it, and regenerated when it changes.
How it is made
Workshop