Next 15 wants to me to type the second parameter of API route handler as Promise<any>

[ymc9]

Hi,

I'm the maintainer of https://github.com/zenstackhq/zenstack, and we have a Next.js adapter that automatically mounts API route handlers. After upgrading to Next15, the compiler complains:

src/app/api/model/[...path]/route.ts
Type error: Route "src/app/api/model/[...path]/route.ts" has an invalid "GET" export:
  Type "Context" is not a valid type for the function's second argument.
    Expected "Promise<any>", got "Promise<{ path: string[]; }> | { path: string[]; }".

My route handler is typed as:

type Context = { params: Promise<{ path: string[]; }> | { path: string[]; }; };

function handler(options: AppRouteRequestHandlerOptions): (req: NextRequest, context: Context) => Promise<NextResponse>;

Why does Next want me to type the second parameter as Promise<any> instead of a more specific one?

[ymc9]

Oh, I see it has to entirely be a Promise now. Closing.