Module stream 

SSE (Server-Sent Events) stream parser.

Parses the text/event-stream format used by LLM APIs for streaming responses. Yields StreamEvent values as content blocks arrive.

The stream processes these SSE event types:

• message_start — initializes the response with usage data
• content_block_start — begins a new content block (text, tool_use, thinking)
• content_block_delta — appends partial data to the current block
• content_block_stop — finalizes and yields the completed block
• message_delta — final usage and stop_reason
• message_stop — stream complete

Structs

ErrorPayload

Payload from an error SSE event.

MessageDeltaPayload

Payload from the message_delta SSE event (stop reason, final usage).

MessageStartPayload

Payload from the message_start SSE event (model, initial usage).

StreamParser

Accumulates streaming data and produces StreamEvent values.

Enums

RawContentBlock

Raw content block from content_block_start (text, tool_use, or thinking).

RawDelta

Raw delta from content_block_delta (text, JSON input, thinking, signature).

RawSseEvent

Raw SSE data payload (deserialized from each data: line in the Anthropic stream).

StreamEvent

Events yielded by the stream parser.