Block Development Libraries

Spade provides official libraries for five languages. Each library handles the runtime details — reading inputs, loading parameters, writing outputs — so you can focus entirely on your processing logic.

All five libraries share the same concepts and workflow:

1. Define a handler function that accepts typed inputs and parameters
2. Process the data using your domain tools and libraries
3. Return a typed output — the library writes it to the correct location
4. Call run(handler) — the library wires everything together

The libraries also provide a manifest builder that generates block manifest YAML from your handler's type annotations, keeping the manifest and implementation in sync.