diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..f892bfb
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,14 @@
+name: CI
+on:
+  pull_request:
+  push:
+
+jobs:
+  hyllama:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: npm i
+      - run: npm run build
+      - run: npm run lint
+      - run: npm test
diff --git a/README.md b/README.md
index abb0d7d..ca7f256 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # hyparquet
 
 [![mit license](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
+[![workflow status](https://github.com/hyparam/hyparquet/actions/workflows/ci.yml/badge.svg)](https://github.com/hyparam/hyparquet/actions)
 
-JavaScript parser for apache parquet files.
+JavaScript parser for [Apache Parquet](https://parquet.apache.org) files.
+
+Apache Parquet is an open source, column-oriented data file format designed for efficient data storage and retrieval.