feat: Cloudflare DO SQLite persisted collection

.github/workflows/e2e-tests.yml

@@ -62,6 +62,10 @@ jobs:
         env:
           ELECTRIC_URL: http://localhost:3000
 
+      - name: Run Cloudflare Durable Object persisted collection E2E tests
+        run: |
+          cd packages/db-cloudflare-do-sqlite-persisted-collection
+          pnpm test:e2e
 
       - name: Run React Native/Expo persisted collection E2E tests
         run: |

packages/db-cloudflare-do-sqlite-persisted-collection/README.md

@@ -0,0 +1,48 @@
+# @tanstack/db-cloudflare-do-sqlite-persisted-collection
+
+Thin SQLite persistence for Cloudflare Durable Objects.
+
+## Public API
+
+- `createCloudflareDOSQLitePersistence(...)`
+- `persistedCollectionOptions(...)` (re-exported from core)
+
+## Quick start
+
+```ts
+import { createCollection } from '@tanstack/db'
+import {
+  createCloudflareDOSQLitePersistence,
+  persistedCollectionOptions,
+} from '@tanstack/db-cloudflare-do-sqlite-persisted-collection'
+
+type Todo = {
+  id: string
+  title: string
+  completed: boolean
+}
+
+export class TodosObject extends DurableObject {
+  persistence = createCloudflareDOSQLitePersistence({
+    // Pass full storage to use native DO transaction support.
+    storage: this.ctx.storage,
+  })
+
+  todos = createCollection(
+    persistedCollectionOptions<Todo, string>({
+      id: `todos`,
+      getKey: (todo) => todo.id,
+      persistence: this.persistence,
+      schemaVersion: 1, // Per-collection schema version
+    }),
+  )
+}
+```
+
+## Notes
+
+- One shared persistence instance can serve multiple collections.
+- Mode defaults are inferred from collection usage:
+  - sync config present => `sync-present-reset`
+  - no sync config => `sync-absent-error`
+- You can still override with `schemaMismatchPolicy` if needed.