diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..cfc3ef1
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          # Pin to 1.1.39 - Bun segfaults during test cleanup on Linux due to
+          # timer callback bugs. This version has been most stable in testing.
+          # See: https://github.com/oven-sh/bun/issues/22452
+          bun-version: "1.1.39"
+
+      - run: bun install
+
+      - run: bun run typecheck
+
+      - run: bun run test
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index d4cbbfb..65a4649 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -15,12 +15,14 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          # Pin to 1.1.39 - Bun segfaults during test cleanup on Linux due to
+          # timer callback bugs. This version has been most stable in testing.
+          # See: https://github.com/oven-sh/bun/issues/22452
+          bun-version: "1.1.39"
 
       - run: bun install
       - run: bun run build
       - run: bun run test
-        continue-on-error: true  # Bun may crash on cleanup even if tests pass
       - run: bun run typecheck
 
       - uses: actions/setup-node@v4