diff --git a/justfile b/justfile
index 243fa19..85f4744 100644
--- a/justfile
+++ b/justfile
@@ -1,2 +1,12 @@
 prettify:
     nix shell nixpkgs#clang-tools -c clang-format -i src/**.cpp src/**.hpp
+
+# Run a Sage script in a Docker container.
+# Output is written relative to the script's directory.
+# Example: just sage-run blend/generate_inputs_for_poq.py 1 10 5 0
+#   -> blend/input.json
+sage-run script +args='':
+    docker run --rm \
+        -v "{{justfile_directory()}}:/work" \
+        -w "/work/$(dirname '{{script}}')" \
+        sagemath/sagemath sage "$(basename '{{script}}')" {{args}}