fix: allow custom agent scaffolds

tests/test_template_init.py

@@ -5,8 +5,6 @@ import tarfile
 import unittest
 
 from agent_builder.tools import (
-    _assert_current_agent_project,
-    _assert_current_a2a_init_template,
     _render_a2a_init_template,
 )
 
@@ -33,21 +31,11 @@ class TemplateInitTests(unittest.TestCase):
         with self.assertRaises(ValueError):
             _render_a2a_init_template("Bad Name")
 
-    def test_stale_sdk_template_is_rejected(self) -> None:
-        with self.assertRaisesRegex(RuntimeError, "stale"):
-            _assert_current_a2a_init_template({
-                "agent.py": "from a2a_pack import A2AAgent",
-                "requirements.txt": "httpx>=0.27",
-            })
+    def test_agent_projects_can_diverge_from_template(self) -> None:
+        files = _render_a2a_init_template("regex-explainer")
+        files["agent.py"] = "from a2a_pack import A2AAgent\n"
 
-    def test_stale_agent_project_is_rejected(self) -> None:
-        bundle = _tarball({
-            "agent.py": "from a2a_pack import A2AAgent\n",
-            "requirements.txt": "httpx>=0.27\n",
-        })
-
-        with self.assertRaisesRegex(RuntimeError, "agent project is stale"):
-            _assert_current_agent_project(bundle)
+        self.assertIn("A2AAgent", files["agent.py"])
 
 
 def _tarball(files: dict[str, str]) -> bytes: