Converts ContentBlockData to a ContentBlock instance. Handles all content block types including text, tool use/result, reasoning, cache points, guard content, and media blocks.
The content block data to convert
A ContentBlock instance of the appropriate type
Error if the content block type is unknown
Converts ContentBlockData to a ContentBlock instance. Handles all content block types including text, tool use/result, reasoning, cache points, guard content, and media blocks.