diff --git a/.github/workflows/backend-pr-ci.yml b/.github/workflows/backend-pr-ci.yml
new file mode 100644
index 0000000..690b7cb
--- /dev/null
+++ b/.github/workflows/backend-pr-ci.yml
@@ -0,0 +1,101 @@
+name: backend-pr-ci
+
+on:
+  pull_request:
+    paths:
+      - "backend/**"
+      - ".github/workflows/backend-pr-ci.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: backend-pr-ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  GO_VERSION: "1.24"
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache-dependency-path: backend/go.sum
+
+      - name: Install golangci-lint
+        run: go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
+
+      - name: Run golangci-lint
+        run: golangci-lint run --timeout=5m
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache-dependency-path: backend/go.sum
+
+      - name: Build WASM
+        run: GOOS=wasip1 GOARCH=wasm go build -buildmode=c-shared -o example.wasm .
+
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache-dependency-path: backend/go.sum
+
+      - name: Run tests (race detector)
+        run: go test -race -timeout 60s -coverprofile=coverage.out $(go list ./...)
+
+      - name: Upload coverage report
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report
+          path: backend/coverage.out
+          retention-days: 7
\ No newline at end of file
diff --git a/.github/workflows/frontend-pr-ci.yml b/.github/workflows/frontend-pr-ci.yml
new file mode 100644
index 0000000..d378789
--- /dev/null
+++ b/.github/workflows/frontend-pr-ci.yml
@@ -0,0 +1,53 @@
+name: frontend-pr-ci
+
+on:
+  pull_request:
+    paths:
+      - "frontend/**"
+      - ".github/workflows/frontend-pr-ci.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: frontend-pr-ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  web-quality:
+    name: Typecheck and build frontend
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.2.23"
+
+      - name: Cache Bun packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.bun/install/cache
+          key: ${{ runner.os }}-bun-${{ hashFiles('frontend/bun.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-bun-
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Typecheck
+        run: bun run typecheck
+
+      - name: Build production bundle
+        run: bun run build
\ No newline at end of file
diff --git a/.github/workflows/mcp-pr-ci.yml b/.github/workflows/mcp-pr-ci.yml
new file mode 100644
index 0000000..43c8ad9
--- /dev/null
+++ b/.github/workflows/mcp-pr-ci.yml
@@ -0,0 +1,53 @@
+name: mcp-pr-ci
+
+on:
+  pull_request:
+    paths:
+      - "mcp/**"
+      - ".github/workflows/mcp-pr-ci.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: mcp-pr-ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  mcp-quality:
+    name: Typecheck and build MCP server
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    defaults:
+      run:
+        working-directory: mcp
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.2.23"
+
+      - name: Cache Bun packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.bun/install/cache
+          key: ${{ runner.os }}-bun-mcp-${{ hashFiles('mcp/bun.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-bun-mcp-
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Typecheck
+        run: bun run typecheck
+
+      - name: Build
+        run: bun run build
\ No newline at end of file