diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6e95a41
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,13 @@
+
+VERSION=0.0.1
+
+all: build test
+
+build:
+	go build ./...
+
+test:
+	go test ./...
+
+release: all
+	hack/tag-release.sh $(VERSION)
diff --git a/hack/tag-release.sh b/hack/tag-release.sh
new file mode 100755
index 0000000..3bdc7a4
--- /dev/null
+++ b/hack/tag-release.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+# Apply and push a release tag.
+set -e
+VERSION=$1
+[[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[^[:space:]]+)?$ ]] || {
+	echo "not a semantic version X.Y.Z: $VERSION"
+	exit 1
+}
+[ "$(git status -s)" = "" ] || {
+	git status
+	echo "working directory not clean"
+	exit 1
+}
+set -x
+git tag "v$VERSION" -a -m "Release $VERSION"
+git push --follow-tags