diff --git a/justfile b/justfile
new file mode 100644
index 0000000..c0da796
--- /dev/null
+++ b/justfile
@@ -0,0 +1,17 @@
+build-all:
+    #!/usr/bin/env fish
+    for dir in (find . -maxdepth 1 -type d -name "nip*")
+        echo "building $dir"
+        go build "./$dir"
+    end
+    echo "building sdk"
+    go build ./sdk
+
+test-all:
+    #!/usr/bin/env fish
+    for dir in (find . -maxdepth 1 -type d -name "nip*")
+        echo "testing $dir"
+        go test "./$dir"
+    end
+    echo "testing sdk"
+    go test ./sdk