fix(dev): investigate shared Wrangler persistence for api/store local R2

[luxass]

Summary

Local apps/api and apps/store development currently do not share seeded manifest data the way we want.

I tried to make setup-dev seed data visible to both apps by sharing Wrangler local persistence, but the result still does not work:

• apps/api manifest route still returns 404
• apps/store /.ucd-store.lock returns an empty versions map
• apps/store /:version/snapshot.json still returns 404
• apps/store file access still works, because it delegates to the API service binding

What was attempted

1. Add the same shared --persist-to ../../.wrangler/state/apps-shared path to:
   • apps/api dev
   • apps/store dev
2. Keep dev:setup on API only.
3. Update packages/ucdjs-scripts/src/commands/setup-dev.ts so the temporary API worker started via unstable_startWorker() also uses the shared persistence path.

What we observed

Default local state is isolated per app

By default, Wrangler local state is stored under each app's own .wrangler/state, so API/store local R2 state is isolated.

Shared persistence did not make seeded manifests visible

Even after updating both app dev scripts to use the same shared --persist-to path, local manifest data still was not visible to the running app workers.

setup-dev uploads succeeded, but not into the state the running workers used

The setup-dev run clearly succeeded and uploaded manifests:

• manifest/17.0.0/manifest.json
• manifest/16.0.0/manifest.json
• manifest/15.1.0/manifest.json
• manifest/15.0.0/manifest.json
• manifest/4.1.0/manifest.json
• manifest/4.0.0/manifest.json

But after the run:

• the shared SQLite file at .wrangler/state/apps-shared/.../miniflare-R2BucketObject/...sqlite had no objects
• the seeded manifest objects were present in apps/api/.wrangler/state/.../miniflare-R2BucketObject/...sqlite

So the practical outcome was:

• setup-dev seeded the API app's default local state
• the app dev workers using --persist-to ../../.wrangler/state/apps-shared did not see those manifests

Runtime evidence

During pnpm run dev:apps:

• @ucdjs/api#dev:setup completed successfully and logged uploaded manifests
• @ucdjs/api#dev still returned 404 for /.well-known/ucd-store/17.0.0.json
• @ucdjs/store#dev returned 200 for /.ucd-store.lock, but with an empty versions object
• @ucdjs/store#dev returned 404 for /17.0.0/snapshot.json
• @ucdjs/store#dev returned 200 for /17.0.0/Blocks.txt

Likely follow-up directions

One of these probably needs to happen:

1. Confirm the correct way to make unstable_startWorker() seed into the same persisted local state used by wrangler dev --persist-to
2. Stop relying on shared persistence and instead generalize setup-dev so it can explicitly target multiple local worker data paths
3. Rethink the store dev flow so it does not require local direct-R2 manifest seeding in the same way

Relevant files

• apps/api/package.json
• apps/store/package.json
• packages/ucdjs-scripts/src/commands/setup-dev.ts
• apps/store/src/routes/lockfile.ts
• apps/store/src/routes/snapshot.ts
• apps/store/src/routes/files.ts