diff --git a/CI/tests/jest.yml b/CI/tests/jest.yml
new file mode 100644
index 0000000..3332838
--- /dev/null
+++ b/CI/tests/jest.yml
@@ -0,0 +1,49 @@
+jest:
+  runs-on: ubuntu-latest
+  steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: "20"
+
+    - name: Cache node_modules
+      uses: actions/cache@v4
+      with:
+        path: node_modules
+        key: node-${{ hashFiles('package-lock.json') }}
+        restore-keys: node-
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run Jest
+      run: |
+        set -euo pipefail
+
+        CONFIG_FOUND=0
+
+        if [ -f "package.json" ]; then
+          if grep -q '"jest"' package.json; then
+            CONFIG_FOUND=1
+          fi
+          for config in "jest.config.js" "jest.config.ts" "jest.config.mjs" "jest.config.cjs"; do
+            if [ -f "$config" ]; then
+              CONFIG_FOUND=1
+              break
+            fi
+          done
+        fi
+
+        if [ $CONFIG_FOUND -eq 0 ]; then
+          echo "::error::No Jest configuration found"
+          exit 1
+        fi
+
+        if npx jest --ci --runInBand --passWithNoTests; then
+          echo "✅ Jest tests passed"
+        else
+          echo "❌ Jest tests failed"
+          exit 1
+        fi
diff --git a/README.md b/README.md
index dc435cf..4332c87 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ that projects compose into their own workflows.
 | mermaid-cli | build | [CI/build/mermaid.yml](https://github.com/prog-time/workflows/blob/main/CI/build/mermaid.yml) |
 | BATS | tests | [CI/tests/bats.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/bats.yml) |
 | go test | tests | [CI/tests/go_test.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/go_test.yml) |
+| Jest | tests | [CI/tests/jest.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/jest.yml) |
 | Laravel | tests | [CI/tests/laravel_tests.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/laravel_tests.yml) |
 | pytest | tests | [CI/tests/pytest.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/pytest.yml) |
 | RSpec | tests | [CI/tests/rspec.yml](https://github.com/prog-time/workflows/blob/main/CI/tests/rspec.yml) |
@@ -96,6 +97,7 @@ Workflows/
 │   │   └── tests/
 │   │       ├── bats.yml
 │   │       ├── go_test.yml
+│   │       ├── jest.yml
 │   │       ├── laravel_tests.yml
 │   │       ├── pytest.yml
 │   │       └── rspec.yml
@@ -116,10 +118,12 @@ Workflows/
 │       │   ├── stylelint.sh
 │       │   ├── swiftlint.sh
 │       │   └── yamllint.sh
-│       └── security/
-│           ├── gitleaks.sh
-│           ├── semgrep.sh
-│           └── trivy.sh
+│       ├── security/
+│       │   ├── gitleaks.sh
+│       │   ├── semgrep.sh
+│       │   └── trivy.sh
+│       └── tests/
+│           └── jest.sh
 │
 ├── CI/                             # assembled output (ready to use)
 │   ├── linters/
@@ -142,6 +146,8 @@ Workflows/
 │   │   ├── gitleaks.bats
 │   │   ├── semgrep.bats
 │   │   └── trivy.bats
+│   ├── tests/
+│   │   └── jest.bats
 │   └── helpers/
 │       └── common.bash             # shared test utilities (mocks, temp dirs)
 │
@@ -252,6 +258,7 @@ shellcheck:
 |---------|--------------|
 | `CI/tests/bats.yml` | BATS tests (`tests/` directory) |
 | `CI/tests/go_test.yml` | Go test suite (`go test ./...`) |
+| `CI/tests/jest.yml` | JavaScript/TypeScript test suite (Jest) |
 | `CI/tests/laravel_tests.yml` | Laravel test suite (PHP 8.2, SQLite, parallel) |
 | `CI/tests/pytest.yml` | Python test suite (pytest) |
 | `CI/tests/rspec.yml` | Ruby test suite (RSpec via Bundler) |
diff --git a/scripts/CI/tests/jest.yml b/scripts/CI/tests/jest.yml
new file mode 100644
index 0000000..48ebc21
--- /dev/null
+++ b/scripts/CI/tests/jest.yml
@@ -0,0 +1,22 @@
+jest:
+  runs-on: ubuntu-latest
+  steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: "20"
+
+    - name: Cache node_modules
+      uses: actions/cache@v4
+      with:
+        path: node_modules
+        key: node-${{ hashFiles('package-lock.json') }}
+        restore-keys: node-
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run Jest
+      run: bash scripts/shell/tests/jest.sh
diff --git a/scripts/shell/tests/jest.sh b/scripts/shell/tests/jest.sh
new file mode 100644
index 0000000..8e7048b
--- /dev/null
+++ b/scripts/shell/tests/jest.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+CONFIG_FOUND=0
+
+if [ -f "package.json" ]; then
+  if grep -q '"jest"' package.json; then
+    CONFIG_FOUND=1
+  fi
+  for config in "jest.config.js" "jest.config.ts" "jest.config.mjs" "jest.config.cjs"; do
+    if [ -f "$config" ]; then
+      CONFIG_FOUND=1
+      break
+    fi
+  done
+fi
+
+if [ $CONFIG_FOUND -eq 0 ]; then
+  echo "::error::No Jest configuration found"
+  exit 1
+fi
+
+if npx jest --ci --runInBand --passWithNoTests; then
+  echo "✅ Jest tests passed"
+else
+  echo "❌ Jest tests failed"
+  exit 1
+fi
diff --git a/tests/tests/jest.bats b/tests/tests/jest.bats
new file mode 100644
index 0000000..795ffbe
--- /dev/null
+++ b/tests/tests/jest.bats
@@ -0,0 +1,59 @@
+#!/usr/bin/env bats
+
+load "../helpers/common"
+
+SCRIPT="$BATS_TEST_DIRNAME/../../scripts/shell/tests/jest.sh"
+
+setup() {
+  setup_test_dir
+  mkdir -p "$TEST_DIR/bin"
+  export PATH="$TEST_DIR/bin:$PATH"
+}
+
+teardown() {
+  teardown_test_dir
+}
+
+# Helper: create a stub for "npx jest ..." that always exits with <exit_code>
+make_npx_stub() {
+  local exit_code="$1"
+  cat > "$TEST_DIR/bin/npx" <<EOF
+#!/usr/bin/env bash
+exit $exit_code
+EOF
+  chmod +x "$TEST_DIR/bin/npx"
+}
+
+@test "no jest config: exits 1 with ::error:: message" {
+  make_npx_stub 0
+  run bash "$SCRIPT"
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"::error::No Jest configuration found"* ]]
+}
+
+@test "package.json with jest in devDependencies, tests pass: exits 0 with success message" {
+  make_npx_stub 0
+  cat > package.json <<'EOF'
+{
+  "devDependencies": {
+    "jest": "^29.0.0"
+  }
+}
+EOF
+  run bash "$SCRIPT"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"✅ Jest tests passed"* ]]
+}
+
+@test "jest.config.js present (no jest in devDependencies), tests fail: exits 1 with failure message" {
+  make_npx_stub 1
+  cat > package.json <<'EOF'
+{
+  "devDependencies": {}
+}
+EOF
+  touch jest.config.js
+  run bash "$SCRIPT"
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"❌ Jest tests failed"* ]]
+}