- Parse multi-line SSE format correctly (event: on separate line, chunk in data.chunk)
- Retry stream GET up to 10x with 300ms backoff when 404 (buffer not ready yet)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
POST .../messages to start generation, then stream from .../generation/stream.
The previous implementation used a non-existent /stream endpoint.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>