SvelteKit PNPM Monorepo TS Errors Reproduction

Created as a tiny-repro to which I will link from a StackOverflow question I'll be posting.

Steps I followed to create this repro:

1. mkdir example
2. cd example
3. pnpm init
4. update package.json changing name to @example/root
5. mkdir packages/app
6. mkdir packages/pkg
7. create pnpm-workspace.yaml
8. cd packages/pkg
9. pnpm init
10. pnpm add @redis/client
11. pnpm add -D typescript tsup
12. update package.json changing name to @example/pkg, remove main key, add type=module, exports, and types. Add some useful scripts.
13. create packages/pkg/index.ts (content visible in repo^)
14. pnpm tsc --init
15. pnpm run build (no errors, generated files seem reasonable.)
16. cd ../app
17. npm create svelte@latest . //suggested by https://kit.svelte.dev
    1. use current directory
    2. skeleton project
    3. use TS syntax
    4. no eslint, prettier, playwright, or vitest since they're not necessary for repro
18. update package.json changing name to @example/app
19. manually add pnpm workspace dependency to package.json: "@example/pkg": "workspace:^"
20. pnpm install
21. create packages/app/src/routes/+page.server.ts (content visible in repo^)
22. cd packages/app && pnpm run dev
23. navigate to http://localhost:5173/
24. Note that the same error appears: Internal server error: exports is not defined
25. git init
26. echo "node_modules" > .gitignore
27. git add .
28. git commit