What
Automatic fallback when the streaming API endpoint returns a 404 error.
Details
- When the streaming endpoint returns HTTP 404, Claude Code now automatically falls back to non-streaming mode
- Logs a warning: "Streaming endpoint returned 404, falling back to non-streaming mode"
- Telemetry tracks these events with
error: "404_stream_creation"
Evidence
Fallback logic (search for "Streaming endpoint returned 404", "404_stream_creation")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.