diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..6cf13c2
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+      - run: bun install --frozen-lockfile
+      - run: bun run typecheck
+      - run: bun run build
+      - run: bun test
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 807485f..2e893e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+
+- Add GitHub Actions CI for pull requests and pushes to `main`, covering frozen
+  dependency installation, typechecking, builds, and tests.
+
 ## 0.1.22
 
 - Publish the compact CLI and MCP list output landed in #1: `servers`, `agents`,