diff --git a/pyproject.toml b/pyproject.toml
index 9579044..c6be7f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,9 @@ dev = [
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
+[tool.hatch.build]
+exclude = ["/.superpowers"]
+
 [tool.hatch.build.targets.wheel]
 packages = ["src/agentseek_api"]
 
diff --git a/tests/unit/test_release_artifacts.py b/tests/unit/test_release_artifacts.py
new file mode 100644
index 0000000..080257c
--- /dev/null
+++ b/tests/unit/test_release_artifacts.py
@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+import tomllib
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_release_build_excludes_private_superpowers_artifacts() -> None:
+    with (ROOT / "pyproject.toml").open("rb") as handle:
+        project = tomllib.load(handle)
+
+    assert "/.superpowers" in project["tool"]["hatch"]["build"]["exclude"]