diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bf35cea8..16a29741 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -82,10 +82,14 @@ jobs:
             projects: --project backend-unit
             scope: backend
             report: backend-unit
-          - label: Backend integration
-            projects: --project backend-integration
+          - label: Backend HTTP integration
+            projects: --project backend-integration-http
             scope: backend
-            report: backend-integration
+            report: backend-integration-http
+          - label: Backend data integration
+            projects: --project backend-integration-data
+            scope: backend
+            report: backend-integration-data
           - label: Frontend
             projects: --project frontend-unit
             scope: frontend
@@ -149,9 +153,10 @@ jobs:
       - name: Verify every coverage report is present
         run: |
           test -f .vitest-reports/backend-unit.blob
-          test -f .vitest-reports/backend-integration.blob
+          test -f .vitest-reports/backend-integration-http.blob
+          test -f .vitest-reports/backend-integration-data.blob
           test -f .vitest-reports/frontend.blob
-          test "$(find .vitest-reports -type f -name '*.blob' | wc -l)" -eq 3
+          test "$(find .vitest-reports -type f -name '*.blob' | wc -l)" -eq 4
       - name: Merge coverage and enforce thresholds
         env:
           COVERAGE_ENFORCE: '1'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4bfd3353..dfc04add 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -35,7 +35,7 @@ pnpm e2e              # Playwright E2E tests
 
 - Backend unit tests use `*.test.ts`, run in Node, and must not create a database-backed application.
 - Frontend unit and component tests use `*.test.ts(x)` and run in jsdom.
-- Backend repository, HTTP, and application integration tests use `*.integration.test.ts`.
+- Backend repository, HTTP, and application integration tests use `*.integration.test.ts`; CI runs HTTP/application and datastore/adapter boundaries independently.
 - `*.cf-test.ts` is reserved for behavior that specifically needs D1, Workers bindings, or the Workers runtime.
 - Pull requests run only `@critical` browser journeys against the local Cloudflare runtime. The complete multi-viewport browser suite runs nightly.
 - Tests must replace S3 and ZPan Cloud with local fakes; CI must not depend on staging services or credentials.
diff --git a/package.json b/package.json
index 31d911de..a35a0af4 100644
--- a/package.json
+++ b/package.json
@@ -32,10 +32,10 @@
     "oauth-scopes:backfill": "tsx scripts/backfill-oauth-scopes.ts",
     "ids:normalize": "tsx scripts/normalize-ids.ts",
     "typecheck": "node scripts/run-typecheck.mjs",
-    "test": "vitest run --project backend-unit --project frontend-unit --project backend-integration",
+    "test": "vitest run --project backend-unit --project frontend-unit --project backend-integration-http --project backend-integration-data",
     "test:cf": "vitest run --project cloudflare-contract --project cloudflare-isolated",
     "test:libsql": "vitest run --project libsql",
-    "test:watch": "vitest --project backend-unit --project frontend-unit --project backend-integration",
+    "test:watch": "vitest --project backend-unit --project frontend-unit --project backend-integration-http --project backend-integration-data",
     "lint": "biome check . && pnpm lint:ids && pnpm lint:tests",
     "lint:ids": "node scripts/lint-id-generation.mjs",
     "lint:tests": "node scripts/lint-test-boundaries.mjs",
diff --git a/vitest.config.ts b/vitest.config.ts
index 90163927..e734447f 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -79,6 +79,15 @@ const isolatedCloudflareTests = [
   'workers/bootstrap.cf-test.ts',
 ]
 
+const backendHttpIntegrationTests = [
+  'server/app.integration.test.ts',
+  'server/auth.integration.test.ts',
+  'server/cors.integration.test.ts',
+  'server/openapi.integration.test.ts',
+  'server/http/**/*.integration.test.ts',
+  'server/middleware/**/*.integration.test.ts',
+]
+
 export default defineConfig({
   test: {
     globals: true,
@@ -111,8 +120,18 @@ export default defineConfig({
       {
         resolve: { alias: aliases },
         test: {
-          name: 'backend-integration',
+          name: 'backend-integration-http',
+          include: backendHttpIntegrationTests,
+          testTimeout: 15_000,
+          setupFiles: ['./server/test/app-version.ts'],
+        },
+      },
+      {
+        resolve: { alias: aliases },
+        test: {
+          name: 'backend-integration-data',
           include: ['server/**/*.integration.test.ts'],
+          exclude: backendHttpIntegrationTests,
           testTimeout: 15_000,
           setupFiles: ['./server/test/app-version.ts'],
         },