diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c61bb7..1fc54c6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [main]
+    branches: [main, dev]
   pull_request:
-    branches: [main]
+    branches: [main, dev]
 
 concurrency:
   group: ci-${{ github.ref }}
@@ -44,8 +44,6 @@ jobs:
           cache: pip
       - name: Install system dependencies
         run: sudo apt-get update && sudo apt-get install -y libpq-dev build-essential
-      - name: Install cartsnitch-common from GitHub
-        run: pip install "cartsnitch-common @ git+https://github.com/cartsnitch/common.git"
       - run: pip install -e ".[dev]" mypy
       - name: Type check
         run: mypy src/cartsnitch_api
@@ -93,8 +91,6 @@ jobs:
           cache: pip
       - name: Install system dependencies
         run: sudo apt-get update && sudo apt-get install -y libpq-dev build-essential
-      - name: Install cartsnitch-common from GitHub
-        run: pip install "cartsnitch-common @ git+https://github.com/cartsnitch/common.git"
       - run: pip install -e ".[dev]"
       - name: Run tests
         run: pytest --tb=short -q
@@ -102,6 +98,9 @@ jobs:
   build-and-push:
     runs-on: runners-cartsnitch
     needs: [lint, test]
+    outputs:
+      calver_tag: ${{ steps.calver.outputs.version }}
+      sha_tag: sha-${{ github.sha }}
     steps:
       - uses: actions/checkout@v4
         with:
@@ -144,21 +143,162 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=sha,prefix=sha-
+            type=sha,prefix=sha-,format=long
             type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
             type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
 
-      - name: Build and push Docker image
+      - name: Build Docker image
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+          file: ./Dockerfile
+          load: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          target: prod
+          build-args: |
+            APT_CACHE_BUST=${{ github.run_id }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Scan api image for vulnerabilities
+        uses: anchore/scan-action@v5
+        id: scan
+        env:
+          GRYPE_CONFIG: .grype.yaml
+        with:
+          image: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:sha-${{ github.sha }}"
+          fail-build: true
+          severity-cutoff: high
+          only-fixed: "true"
+          output-format: sarif
+
+      - name: Upload api scan results to GitHub Security
+        uses: github/codeql-action/upload-sarif@v3
+        if: always()
+        with:
+          sarif_file: ${{ steps.scan.outputs.sarif }}
+
+      - name: Push Docker image
+        if: github.event_name == 'push'
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            APT_CACHE_BUST=${{ github.run_id }}
+          cache-from: type=gha
 
       - name: Create git tag
         if: github.event_name == 'push' && github.ref == 'refs/heads/main'
         run: |
           git tag "v${{ steps.calver.outputs.version }}"
-          git push origin "v${{ steps.calver.outputs.version }}"
\ No newline at end of file
+          git push origin "v${{ steps.calver.outputs.version }}"
+
+  deploy-dev:
+    runs-on: runners-cartsnitch
+    needs: [build-and-push]
+    if: always() && !cancelled() && github.event_name == 'push' && (github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main')
+    steps:
+      - name: Generate GitHub App token
+        id: app-token
+        uses: actions/create-github-app-token@v1
+        with:
+          app-id: ${{ secrets.CARTSNITCH_APP_ID }}
+          private-key: ${{ secrets.CARTSNITCH_APP_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+          repositories: infra
+
+      - name: Checkout infra repo
+        uses: actions/checkout@v4
+        with:
+          repository: cartsnitch/infra
+          token: ${{ steps.app-token.outputs.token }}
+          ref: main
+          path: infra
+
+      - name: Install kubectl
+        uses: azure/setup-kubectl@v4
+
+      - name: Install kustomize
+        uses: imranismail/setup-kustomize@v2
+
+      - name: Determine image tag
+        id: api_tag
+        run: |
+          if [ "${{ github.ref }}" == "refs/heads/main" ]; then
+            echo "tag=${{ needs.build-and-push.outputs.calver_tag }}" >> "$GITHUB_OUTPUT"
+          else
+            echo "tag=${{ needs.build-and-push.outputs.sha_tag }}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Update api image tag
+        if: needs.build-and-push.result == 'success'
+        run: |
+          cd infra/apps/overlays/dev
+          kustomize edit set image ghcr.io/cartsnitch/api:${{ steps.api_tag.outputs.tag }}
+
+      - name: Commit and push to infra
+        run: |
+          cd infra
+          git config user.name "cartsnitch-ci[bot]"
+          git config user.email "cartsnitch-ci[bot]@users.noreply.github.com"
+          git add apps/overlays/dev/kustomization.yaml
+          git commit -m "ci(dev): update api image"
+          git pull --rebase origin main
+          git push origin main
+
+  deploy-uat:
+    runs-on: runners-cartsnitch
+    needs: [build-and-push]
+    if: always() && !cancelled() && github.event_name == 'push' && (github.ref == 'refs/heads/uat' || github.ref == 'refs/heads/main')
+    steps:
+      - name: Generate GitHub App token
+        id: app-token
+        uses: actions/create-github-app-token@v1
+        with:
+          app-id: ${{ secrets.CARTSNITCH_APP_ID }}
+          private-key: ${{ secrets.CARTSNITCH_APP_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+          repositories: infra
+
+      - name: Checkout infra repo
+        uses: actions/checkout@v4
+        with:
+          repository: cartsnitch/infra
+          token: ${{ steps.app-token.outputs.token }}
+          ref: main
+          path: infra
+
+      - name: Install kubectl
+        uses: azure/setup-kubectl@v4
+
+      - name: Install kustomize
+        uses: imranismail/setup-kustomize@v2
+
+      - name: Determine image tag
+        id: api_tag
+        run: |
+          if [ "${{ github.ref }}" == "refs/heads/main" ]; then
+            echo "tag=${{ needs.build-and-push.outputs.calver_tag }}" >> "$GITHUB_OUTPUT"
+          else
+            echo "tag=${{ needs.build-and-push.outputs.sha_tag }}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Update api image tag
+        if: needs.build-and-push.result == 'success'
+        run: |
+          cd infra/apps/overlays/uat
+          kustomize edit set image ghcr.io/cartsnitch/api:${{ steps.api_tag.outputs.tag }}
+
+      - name: Commit and push to infra
+        run: |
+          cd infra
+          git config user.name "cartsnitch-ci[bot]"
+          git config user.email "cartsnitch-ci[bot]@users.noreply.github.com"
+          git add apps/overlays/uat/kustomization.yaml
+          git commit -m "ci(uat): update api image"
+          git pull --rebase origin main
+          git push origin main
\ No newline at end of file
diff --git a/.grype.yaml b/.grype.yaml
new file mode 100644
index 0000000..001d21a
--- /dev/null
+++ b/.grype.yaml
@@ -0,0 +1,4 @@
+ignore:
+  # Python 3.12 CVEs — only fixed in 3.13+, cannot upgrade major version safely
+  - vulnerability: CVE-2025-13836
+  - vulnerability: CVE-2026-4519
\ No newline at end of file
diff --git a/CLAUDE.md b/CLAUDE.md
index fcba89c..dbd3c02 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -23,7 +23,7 @@ CartSnitch is a self-hosted grocery price intelligence platform built as a polyr
 ### Architecture Decisions
 
 - **Polyrepo:** Each service has its own repo, Dockerfile, CI/CD pipeline.
-- **Shared DB:** One PostgreSQL cluster. This service reads from all tables for serving frontend queries. Models come from `cartsnitch-common`.
+- **Shared DB:** One PostgreSQL cluster. This service reads from all tables for serving frontend queries. The API has its own local SQLAlchemy models — it does NOT import from `cartsnitch-common`.
 - **Inter-service comms:** REST to internal services, Redis pub/sub for event subscriptions.
 - **Target scale:** 500–1,000 users initially.
 
@@ -42,7 +42,7 @@ The API Gateway is the single entry point for the frontend PWA and any external
 
 - Python 3.12+
 - FastAPI (async)
-- SQLAlchemy 2.0 (via `cartsnitch-common`, read-heavy)
+- SQLAlchemy 2.0 (async, read-heavy)
 - Pydantic v2 (request/response validation)
 - python-jose or PyJWT (JWT auth)
 - passlib + bcrypt (password hashing)