TypeScript Type Error: Workflows Not Accessible via `internal` API

// workflows/research/private.ts
import { workflowManager } from "@/src/convex/workflows";
import { internal } from "@/src/convex/_generated/api";

export const researchWorkflow = workflowManager.define({
  args: { problemId: v.id("problems") },
  handler: async (step, { problemId }) => {
    // ... workflow logic
  },
});

export const startWorkflow = internalAction({
  handler: async (ctx, { problemId }) => {
    // :x: TypeScript Error: Property 'researchWorkflow' does not exist
    const workflowId = await workflowManager.start(
      ctx,
      internal.workflows.research.private.researchWorkflow, // Error here
      { problemId }
    );
  },
});

Property 'researchWorkflow' does not exist on type '{ startWorkflow: FunctionReference<...> }'.

const workflowId = await workflowManager.start(
  ctx,
  // @ts-expect-error - researchWorkflow exists at runtime but TypeScript doesn't see it
  internal.workflows.research.private.researchWorkflow,
  { problemId }
);