diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..77eccda
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,15 @@
+if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
+fi
+
+watch_file flake.nix
+watch_file flake.lock
+if ! use flake . --no-pure-eval
+then
+  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
+fi
+
+# NOTE: Add a line like this to .env
+# export ANTHROPIC_API_KEY=XXX
+dotenv
+
diff --git a/.gitignore b/.gitignore
index 9e7de68..8f5ec81 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 .devenv
-.envrc
+.env
 agent