diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..19e50ea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+
+__pycache__/
+
+.venv
+.venv/
+venv/
+
+smithycmd.spec
+smithygui.spec
+build/
+dist/
+
+.ipynb_checkpoints
+.ruff_cache/
+.pytest_cache/
+.benchmarks/