feat(ai): add experimental_context parameter to prepareStep callback#10171
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lgrammel merged 2 commits intovercel:mainfrom Dec 10, 2025
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Closing for #9682 |
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Any change to reconsider this PR? #9682 is not really an alternative since the options cannot be changed (as far as I know) in the tools execution. Also, options is not available (yet?) on the prepareStep either. I think it would be very convenient to have the context available on the prepareStep arguments. In our use case, we have a tool that delegates/handoffs to an agent and setting the agentId on the context and the prepareStep would retrieve the necesary tools for that agent and set the system/activeTools for the specific agent. Can we reconsider this? Or is there a recommended alternative to achieve this? |
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Any chance this can be merged please? I'm happy to make any changes if required. |
lgrammel
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## Background Similar to modifying messages, model, etc. it would be useful to be able to modify the experimental context for each step. ## Summary * improve jsdoc of `PrepareStepFunction` and `PrepareStepResult` * allow modification of `experimental_context` in `prepareStep` ## Related Issues Builds on #10171 Resolves #10482
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Background
experimental_contextis only available in tool execution but not in the prepareStep callback. This prevents developers from using context data (like user session info or auth state) when making step-specific decisions in multi-step workflows.Summary
Added experimental_context as an optional parameter to the prepareStep callback.
Manual Verification
Tested with both generateText and streamText.
Checklist
pnpm changesetin the project root)