diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4fada40..b6c67b1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,10 +5,15 @@ on:
     branches: [main]
   pull_request:
     branches: [main]
+  workflow_call: # Allow manual run
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
       - uses: actions/checkout@v4
 
@@ -19,3 +24,5 @@ jobs:
       - run: npm ci
       - run: npm run build
       - run: npm test
+
+