diff --git a/.github/cosmo/build b/.github/cosmo/build
new file mode 100755
index 0000000..05c43dc
--- /dev/null
+++ b/.github/cosmo/build
@@ -0,0 +1,21 @@
+#!/bin/sh
+set -eux
+
+SAMU_DIR="$(pwd)"
+# download cosmocc
+cd /sc
+wget https://github.com/jart/cosmopolitan/releases/download/3.3.3/cosmocc-3.3.3.zip
+mkdir -p cosmocc
+cd cosmocc
+unzip ../cosmocc-3.3.3.zip
+
+# register
+cd /sc/cosmocc
+sudo cp ./bin/ape-x86_64.elf /usr/bin/ape
+sudo sh -c "echo ':APE:M::MZqFpD::/usr/bin/ape:' >/proc/sys/fs/binfmt_misc/register"
+
+# build fat binary
+COSMO_DIR="/sc/cosmocc"
+cd "$SAMU_DIR"
+COSMOCC="/sc/cosmocc/bin/cosmocc"
+make -j CC="$COSMOCC"
diff --git a/.github/workflows/cosmo.yml b/.github/workflows/cosmo.yml
new file mode 100644
index 0000000..36bec2f
--- /dev/null
+++ b/.github/workflows/cosmo.yml
@@ -0,0 +1,35 @@
+name: Release
+
+on:
+  workflow_dispatch:
+  release:
+    types: [created]
+  push:
+    tags:
+      - "*.*"
+
+permissions:
+  contents: read
+
+jobs:
+
+  release-cosmo:
+    permissions:
+      contents: write  # for softprops/action-gh-release to create GitHub release
+    name: Build release binaries for Cosmo
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@master
+      - name: create build folder
+        run: |
+          sudo mkdir -p /sc
+          sudo chmod -R 0777 /sc
+      - name: build APE binary of samurai
+        run: bash ./.github/cosmo/build
+      - name: push binary to github
+        uses: softprops/action-gh-release@v1
+        with:
+          draft: true
+          files: |
+            samu