feat(ai): add convertDataPart option to convertToModelMessages #9720
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Add optional convertDataPart callback for converting custom data parts (URLs, code files, etc.) to text or file parts that models can process. Fully type-safe using existing UIMessage generics.
lgrammel
reviewed
Oct 22, 2025
lgrammel
reviewed
Oct 22, 2025
lgrammel
reviewed
Oct 22, 2025
lgrammel
reviewed
Oct 22, 2025
lgrammel
reviewed
Oct 22, 2025
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| **Including Code Files as Context** |
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Love this, thanks for putting this together @Drew-Garratt 👏
Would it be worth to include an example here for toggling on custom tools that a user might turn on when sending the user message? In this way, it can be stored alongside the other user message parts inside the DB and one can easily restore this context when the user wants to edit the message later on.
lgrammel
reviewed
Oct 23, 2025
lgrammel
reviewed
Oct 23, 2025
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Thanks for the PR! i like where it is headed but some details need to be changed. I'll see if I can make the changes today on this branch. |
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Changed the generics, simplified the tests, changed return from null to undefined, exposed is* helpers again, supported assistant data parts. |
lgrammel
approved these changes
Oct 23, 2025
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content/docs/07-reference/02-ai-sdk-ui/31-convert-to-model-messages.mdx
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…sages.mdx Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>
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Summary
Adds optional
convertDataPartcallback toconvertToModelMessagesfor converting custom data parts (URLs, code files, etc.) into text or file parts that models can process.Changes
convertDataPartoption toconvertToModelMessagesfunctionisTextUIPartandisFileUIParttoui-messages.tsTesting
convert-to-model-messages.test.tsDocumentation
Related Issues
Closes #9617