feat: port database from MySQL to PostgreSQL

.github/workflows/database-profile-reliability.yml

@@ -31,16 +31,15 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     services:
-      mysql:
-        image: mysql:8.4
+      postgres:
+        image: postgres:16
         env:
-          MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
-          MYSQL_ROOT_HOST: "%"
-          MYSQL_DATABASE: loops_profile_tests
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: loops_profile_tests
         ports:
-          - 3306:3306
+          - 5432:5432
         options: >-
-          --health-cmd="mysqladmin ping --host=127.0.0.1 --user=root"
+          --health-cmd="pg_isready --host=127.0.0.1 --username=postgres"
           --health-interval=5s
           --health-timeout=3s
           --health-retries=30
@@ -49,7 +48,7 @@ jobs:
       - uses: ./.github/actions/setup-js
       - name: Verify profile queries and lifecycle decisions without database writes
         env:
-          LOOPS_ACTIVATION_READONLY_TEST_URL: mysql://root@127.0.0.1:3306/loops_profile_tests
+          LOOPS_ACTIVATION_READONLY_TEST_URL: postgres://postgres:postgres@127.0.0.1:5432/loops_profile_tests
         run: >-
           bun test
           scripts/loops/activation.test.ts

.github/workflows/test-self-hosting.yml

@@ -35,11 +35,11 @@ jobs:
           docker compose up -d
           echo "Waiting for services to initialize..."
 
-      - name: Wait for MySQL to be healthy
+      - name: Wait for PostgreSQL to be healthy
         run: |
-          echo "Waiting for MySQL..."
-          timeout 120 bash -c 'until docker inspect cap-mysql --format="{{.State.Health.Status}}" 2>/dev/null | grep -q "healthy"; do sleep 2; done'
-          echo "MySQL is healthy"
+          echo "Waiting for PostgreSQL..."
+          timeout 120 bash -c 'until docker inspect cap-postgres --format="{{.State.Health.Status}}" 2>/dev/null | grep -q "healthy"; do sleep 2; done'
+          echo "PostgreSQL is healthy"
 
       - name: Wait for MinIO to be healthy
         run: |
@@ -98,7 +98,7 @@ jobs:
       - name: Test database has tables
         run: |
           echo "Testing database..."
-          tables=$(docker exec cap-mysql mysql -ucap -pcap-local-pwd-123 cap -e "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema='cap';" -s -N 2>/dev/null)
+          tables=$(docker exec cap-postgres psql -U cap -d cap -tAc "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema='public';" 2>/dev/null)
           if [ "$tables" -gt 0 ]; then
             echo "✓ Database has $tables tables (migrations ran successfully)"
           else

.github/workflows/validate-migration-journal.yml

@@ -18,19 +18,26 @@ jobs:
         run: |
           JOURNAL_PATH="packages/database/migrations/meta/_journal.json"
 
-          # Get the journal from previous commit
-          git fetch origin
+          # Compare against the journal on the branch this PR targets
+          git fetch origin "${{ github.base_ref }}"
+          BASE_REF="origin/${{ github.base_ref }}"
 
-          # Check if journal exists in previous commit
-          if git show 34cd664a1215:$JOURNAL_PATH > /dev/null 2>&1; then
-            git show 34cd664a1215:$JOURNAL_PATH > base.json
+          if git show "$BASE_REF:$JOURNAL_PATH" > /dev/null 2>&1; then
+            git show "$BASE_REF:$JOURNAL_PATH" > base.json
           else
-            echo '{"version":"5","dialect":"mysql","entries":[]}' > base.json
+            echo '{"version":"7","dialect":"postgresql","entries":[]}' > base.json
           fi
 
           # Get current journal
           cp $JOURNAL_PATH current.json
 
+          BASE_DIALECT=$(jq -r '.dialect' base.json)
+          CURRENT_DIALECT=$(jq -r '.dialect' current.json)
+          if [ "$BASE_DIALECT" = "mysql" ] && [ "$CURRENT_DIALECT" = "postgresql" ]; then
+            echo "::notice file=$JOURNAL_PATH,title=Database Rebaseline::Migrations were rebaselined from MySQL to PostgreSQL; skipping the append-only comparison."
+            exit 0
+          fi
+
           # Check version and dialect haven't changed
           BASE_VERSION=$(jq -r '.version' base.json)
           CURRENT_VERSION=$(jq -r '.version' current.json)
@@ -39,8 +46,6 @@ jobs:
             exit 1
           fi
 
-          BASE_DIALECT=$(jq -r '.dialect' base.json)
-          CURRENT_DIALECT=$(jq -r '.dialect' current.json)
           if [ "$BASE_DIALECT" != "$CURRENT_DIALECT" ]; then
             echo "::error file=$JOURNAL_PATH,line=3,title=Dialect Changed::Migration journal dialect cannot be changed (was: $BASE_DIALECT, now: $CURRENT_DIALECT)"
             exit 1

AGENTS.md

@@ -68,7 +68,7 @@ Additionally, `unused_must_use = "deny"` applies to all Rust code: every `Result
 - TypeScript / JS / JSON / CSS: **tab indent** and **double-quoted** strings, enforced by Biome (see `biome.json`). Do not configure per-file overrides.
 - Rust: `rustfmt` default style + the denied clippy lints in the Pre-Generation Invariants above.
 - Naming: files kebab‑case (`user-menu.tsx`); React/Solid components PascalCase; hooks `useX`; Rust modules snake_case; crates kebab‑case.
-- Runtime: Node 20, Bun 1.4.0, Rust 1.88+, Docker for MySQL/MinIO.
+- Runtime: Node 20, Bun 1.4.0, Rust 1.88+, Docker for PostgreSQL/MinIO.
 
 (See **Pre-Generation Invariants** at the top of this file for the comments policy and the denied clippy/Biome patterns. Those are the source of truth — do not duplicate or weaken them here.)
 

CONTRIBUTING.md

@@ -36,7 +36,7 @@ Before anything else, make sure you have the following installed:
 Keep the root `react` and `react-dom` development dependencies aligned with `apps/mobile`. They keep Expo native dependencies deduplicated under Bun’s hoisted linker, while the web app retains its separately resolved React version.
 
 Run `bun install`, then run `bun run env-setup` to generate a `.env` file configured for your environment.
-It will ask you which apps you intend to run, whether you'd like to use Docker to run S3 (MinIO) and MySQL locally,
+It will ask you which apps you intend to run, whether you'd like to use Docker to run S3 (MinIO) and PostgreSQL locally,
 and allow you to provide overrides as needed.
 
 Then run `bun run cap-setup` to install native dependencies such as FFmpeg.
@@ -62,5 +62,5 @@ and `%programfiles%/so.cap.desktop.dev/recordings` on Windows.
 
 ### `@cap/web` (cap.so website)
 
-When running `bun run dev` or `bun run dev:web`, a MySQL database and MinIO S3 server will also be using Docker.
+When running `bun run dev` or `bun run dev:web`, a PostgreSQL database and MinIO S3 server will also be using Docker.
 If you want to _only_ run the `@cap/web` NextJS app, `cd` into `./apps/web` and run `bun run dev`.

README.md

@@ -112,14 +112,14 @@ See the [self-hosting guide](https://cap.so/docs/self-hosting) for email setup,
 
 ## Local Development
 
-Cap is a Turborepo monorepo with Rust, TypeScript, Tauri, SolidStart, Next.js, Drizzle, MySQL, Tailwind CSS, and shared media crates.
+Cap is a Turborepo monorepo with Rust, TypeScript, Tauri, SolidStart, Next.js, Drizzle, PostgreSQL, Tailwind CSS, and shared media crates.
 
 Requirements:
 
 - Node.js 20 or newer
 - Bun 1.4.0
 - Rust 1.88 or newer
-- Docker for MySQL, MinIO, and local services
+- Docker for PostgreSQL, MinIO, and local services
 
 Install and set up the repo: