Stricter generated types for Workflows in worker-configuration.d.ts

[alexbilbie]

Describe the solution

When you have durable objects defined and run wrangler types then the following strict types will be generated in worker-configuration.d.ts

declare namespace Cloudflare {
	interface Env {
		MY_DURABLE_OBJECT: DurableObjectNamespace<import("./workers/my-script").MyDurableObject>;
		...
	}
}

When a workflow is defined the generated type is:

declare namespace Cloudflare {
	interface Env {
		MY_WORKFLOW: Workflow;
		...
	}
}

It would be really helpful to have something akin to this instead:

declare namespace Cloudflare {
	interface Env {
		MY_WORKFLOW: Workflow<MyWorkflowParams>;
		// or
		MY_WORKFLOW: import("./workers/my-script").MyWorkflow;
	}
}

[aimproxy]

I share the same opinion as @alexbilbie, this already happens for services between workers bindings, if u run wrangler types -c wrangler.jsonc -c ../foobar-worker/wrangler.jsonc the output will be:

declare namespace Cloudflare {
	interface Env {
		FOOBAR_SERVICE: Service<import("../foobar-worker/src/index").FoobarService>;
	}
}

Would be nice to have the same behavior for workflows!