migrate-ai-sdk-v6-to-v7

Upgrade all ai and @ai-sdk packages, then apply the breaking changes: rename system to instructions, fullStream to stream, onFinish to onEnd, and move telemetry to @ai-sdk/otel. Finish by running typecheck and targeted tests on streaming, tools, and multi-step flows.

Key changes include system renamed to instructions, result helpers replaced by stateless functions like toUIMessageStream, top-level result fields now aggregating all steps, and OpenTelemetry moved into the separate @ai-sdk/otel package. Node.js 22 and ESM-only modules are also required.

Yes, AI SDK 7.0 requires Node.js version 22 or higher. The packages are also ESM-only, so CommonJS require() calls must be replaced with ESM imports or the project must set type to module.

OpenTelemetry support moved out of the core ai package in v7. Install @ai-sdk/otel and call registerTelemetry with an OpenTelemetry instance at app startup, moving any tracer configuration into the OpenTelemetry constructor.

Result methods like toUIMessageStreamResponse are deprecated in favor of top-level stateless helpers. Call toUIMessageStream with the result stream, then pass it to createUIMessageStreamResponse or pipeUIMessageStreamToResponse.