diff --git a/__init__.py b/__init__.py
index 10cdf1c..8283e84 100644
--- a/__init__.py
+++ b/__init__.py
@@ -13,18 +13,10 @@ sys.path.append(ext_dir)
 try:
     import black
 except ImportError:
-    print("Unable to import requirements for ComfyUI-SaveAsScript.")
-    print("Installing...")
-
-    import importlib
-
-    spec = importlib.util.spec_from_file_location(
-        "impact_install", os.path.join(os.path.dirname(__file__), "install.py")
-    )
-    impact_install = importlib.util.module_from_spec(spec)
-    spec.loader.exec_module(impact_install)
-
-    print("Successfully installed. Hopefully, at least.")
+    raise ImportError(
+        "ComfyUI-to-Python-Extension requires the project dependencies to be installed. "
+        f"Run 'uv sync' in {ext_dir} with Python 3.12+ before loading this extension."
+    ) from None
 
 # Prevent reimporting of custom nodes
 os.environ["RUNNING_IN_COMFYUI"] = "TRUE"
diff --git a/js/save-as-script.js b/js/save-as-script.js
index 9de431f..19175fc 100644
--- a/js/save-as-script.js
+++ b/js/save-as-script.js
@@ -1,6 +1,9 @@
 import { api } from "../../scripts/api.js";
 import { app } from "../../scripts/app.js";
 
+const DEFAULT_SCRIPT_FILENAME = "workflow_api.py";
+const DEFAULT_WORKFLOW_NAME = "workflow_api.json";
+
 function $el(tag, options = {}) {
 	const element = document.createElement(tag);
 	const { parent, style, ...props } = options;
@@ -39,15 +42,12 @@ const extension = {
 		});
 	},
 	savePythonScript() {
-		var filename = prompt("Save script as:");
-		if(filename === undefined || filename === null || filename === "") {
-			return
-		}
-		
+		const filename = DEFAULT_SCRIPT_FILENAME;
+
 		app.graphToPrompt().then(async (p) => {
 			const frontendWorkflow = p.workflow ?? app.graph.serialize();
 			const json = JSON.stringify({
-				name: filename + ".json",
+				name: DEFAULT_WORKFLOW_NAME,
 				workflow: JSON.stringify(p.output, null, 2),
 				frontend_workflow: JSON.stringify(frontendWorkflow, null, 2),
 			}, null, 2); // convert the data to a JSON string
@@ -55,10 +55,6 @@ const extension = {
 			if(response.status == 200) {
 				const blob = new Blob([await response.text()], {type: "text/python;charset=utf-8"});
 				const url = URL.createObjectURL(blob);
-				if(!filename.endsWith(".py")) {
-					filename += ".py";
-				}
-
 				const a = $el("a", {
 					href: url,
 					download: filename,
diff --git a/pyproject.toml b/pyproject.toml
index b100249..1e07500 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,6 +3,7 @@ name = "comfyui-to-python-extension"
 description = "This custom node allows you to generate pure python code from your ComfyUI workflow with the click of a button. Great for rapid experimentation or production deployment."
 version = "2.0.0"
 license = { text = "MIT License" }
+requires-python = ">=3.12"
 dependencies = ["black"]
 
 [project.urls]
diff --git a/tests/test_project_contracts.py b/tests/test_project_contracts.py
new file mode 100644
index 0000000..5632583
--- /dev/null
+++ b/tests/test_project_contracts.py
@@ -0,0 +1,33 @@
+import tomllib
+import unittest
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+
+
+class ProjectContractsTest(unittest.TestCase):
+    def test_project_declares_supported_python_floor(self):
+        pyproject = tomllib.loads((REPO_ROOT / "pyproject.toml").read_text(encoding="utf-8"))
+
+        self.assertEqual(pyproject["project"]["requires-python"], ">=3.12")
+
+    def test_readme_documents_python_support_and_default_save_filename(self):
+        readme = (REPO_ROOT / "README.md").read_text(encoding="utf-8")
+
+        self.assertIn("This project supports Python 3.12 and newer.", readme)
+        self.assertIn("default filename `workflow_api.py`", readme)
+
+    def test_extension_import_path_requires_uv_sync_instead_of_running_install_py(self):
+        init_text = (REPO_ROOT / "__init__.py").read_text(encoding="utf-8")
+
+        self.assertIn("Run 'uv sync'", init_text)
+        self.assertNotIn("spec_from_file_location", init_text)
+        self.assertNotIn("Successfully installed. Hopefully, at least.", init_text)
+
+    def test_frontend_save_flow_uses_deterministic_filename_without_prompt(self):
+        save_as_script = (REPO_ROOT / "js" / "save-as-script.js").read_text(encoding="utf-8")
+
+        self.assertIn('const DEFAULT_SCRIPT_FILENAME = "workflow_api.py";', save_as_script)
+        self.assertNotIn("prompt(", save_as_script)
+