Migrate backend from Supabase to Neon and R2

[nedcut]

What changed

• replaced the Supabase browser runtime with Neon Auth and the Neon Data API
• recreated the application schema, functions, grants, and RLS policies in Neon
• replaced Supabase Storage with authorized R2 presigned uploads and a public read-only Cloudflare Worker
• migrated and verified all database rows and 656 media objects
• replaced Supabase Realtime with visibility-aware polling
• added migration, verification, rollback, and deployment documentation

Why

Supabase project pausing was making the application unavailable. Neon and Cloudflare R2 provide the required Postgres, authentication, API, and object-storage capabilities without that availability failure mode.

Production verification

• Vercel production build and deployment succeeded after removing Supabase environment variables
• Neon Auth, anonymous tokens, and all Neon Data API reads returned 200
• R2 media rendered through the Cloudflare Worker with 200 responses
• no Supabase production requests were observed
• R2 copy verified exactly: 656 objects, 386,648,282 bytes

Local validation

• npm run lint
• npm run typecheck
• npx tsc -p cloudflare/media-worker/tsconfig.json
• npm run test — 241 tests passed
• npm run build
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
lofoten-map	Ready	Preview, Comment	Jul 20, 2026 4:56pm

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 0488b79d-a702-4f89-8c6d-bf9e2f65c5c6

📥 Commits

Reviewing files that changed from the base of the PR and between e090810 and 2fd0eed.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (50)

• .env.example
• .gitignore
• .neon
• README.md
• app/api/storage/delete/route.ts
• app/api/storage/presign/route.ts
• app/layout.tsx
• app/page.tsx
• cloudflare/media-worker/src/index.ts
• cloudflare/media-worker/tsconfig.json
• cloudflare/media-worker/worker-configuration.d.ts
• cloudflare/media-worker/wrangler.jsonc
• docs/TODO.md
• docs/WORKLOG.md
• e2e/trip.spec.ts
• eslint.config.mjs
• lib/access.test.ts
• lib/access.ts
• lib/backend.test.ts
• lib/backend.ts
• lib/hooks/useMembership.ts
• lib/hooks/useProfile.ts
• lib/hooks/useTripAuth.ts
• lib/hooks/useTripData.ts
• lib/hooks/useTripMutations.ts
• lib/invite-only-access.test.ts
• lib/local-trip-store.ts
• lib/object-store-server.ts
• lib/object-store.test.ts
• lib/object-store.ts
• lib/photo-upload.test.ts
• lib/photo-upload.ts
• lib/realtime-patch.test.ts
• lib/realtime-patch.ts
• lib/supabase.test.ts
• lib/supabase.ts
• neon/README.md
• neon/migration/01_prepare_staging.sql
• neon/migration/02_apply_staging.sql
• neon/migration/03_verify.sql
• neon/migration/04_cleanup_staging.sql
• neon/migration/export_from_supabase.sh
• neon/migration/load_into_neon.sh
• neon/schema.sql
• package.json
• playwright.config.ts
• scripts/dedupe-photos.mjs
• scripts/migrate-media-to-r2.mjs
• scripts/purge-orphan-objects.mjs
• tsconfig.json

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/neon-r2-migration

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