Related: Streaming Responses, Handling Large / Binary Responses
Event payload fields:
| Event | Fields |
|---|---|
| start | streamId, totalBytes? |
| chunk | streamId, index, base64, size |
| end | streamId, totalBytes |
| error | streamId, message |
Sequence guarantees: exactly one start, ordered chunk indices, exactly one terminal (end or error).
Consumer tip: assemble base64 chunks sequentially; decode at end to avoid partial overhead.
Next: Development Setup.