feat(compose): unify FunctionToolResult with Blocks#968
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JonXSnow
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Apr 15, 2026
JonXSnow
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- Add ContentBlocks field to FunctionToolResult for multimodal output
- Convert MessageInputPart (image/audio/video/file) to ContentBlock in toolMessageToAgenticMessage for both sync and stream paths
- Add messageInputPartsToContentBlocks helper and derefString utility
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Replace FunctionToolResult.Result string field with Blocks
[]*FunctionToolResultBlock to uniformly represent all tool results
(text-only and multimodal) as structured content blocks.
- Add FunctionToolResultBlock type supporting text, image, audio,
video, and file content with String() method
- Remove FunctionToolResult.Result field; text results are now
wrapped as FunctionToolResultBlock{Text: ...}
- Update FunctionToolResultAgenticMessage to accept blocks parameter
- Convert MessageInputPart to FunctionToolResultBlock in compose layer
- Update concatFunctionToolResults to merge via Blocks append
- Add comprehensive tests for multimodal and streaming tool results
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shentongmartin
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Replace FunctionToolResult.Result string field with Blocks
[]*FunctionToolResultBlock to uniformly represent all tool results
(text-only and multimodal) as structured content blocks.
- Add FunctionToolResultBlock type supporting text, image, audio,
video, and file content with String() method
- Remove FunctionToolResult.Result field; text results are now
wrapped as FunctionToolResultBlock{Text: ...}
- Update FunctionToolResultAgenticMessage to accept blocks parameter
- Convert MessageInputPart to FunctionToolResultBlock in compose layer
- Update concatFunctionToolResults to merge via Blocks append
- Add comprehensive tests for multimodal and streaming tool results
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