v2 SDK message builder assigns the placeholder id "asdasd"

packages/sdk/js/src/v2/data.ts assigns the literal string "asdasd" as the id for the message and for every part it builds:

const info: UserMessage = {
  ...rest,
  id: "asdasd",
  ...
}

return {
  info,
  parts: input.parts.map((part) => ({
    ...part,
    id: "asdasd",
    ...
  }) as Part),
}

data is exported from src/v2/index.ts (export * as data from "./data.js") and ./v2 is in the package exports, so this is public API. Every message and every part built through it comes out with the same id.

grep -rn "asdasd" packages/ only finds these two lines, so it doesn't look like a sentinel value anyone checks for.

I have a patch that generates msg_/prt_ ids in the same monotonic format the server uses. Can open a PR if that's the direction you want.