builder: require durable workspace execution

agent_builder/tools.py

@@ -15,6 +15,7 @@ import tarfile
 import time
 from dataclasses import dataclass
 from importlib import resources
+from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
 import boto3
@@ -927,11 +928,21 @@ def _render_a2a_init_template(
 
 
 def _render_sdk_template(template: str, /, **vars: str) -> str:
-    text = (
-        resources.files("a2a_pack.cli.templates")
-        .joinpath(template)
-        .read_text(encoding="utf-8")
+    local_templates = (
+        Path(__file__).resolve().parents[2]
+        / "a2a"
+        / "a2a_pack"
+        / "cli"
+        / "templates"
     )
+    if local_templates.exists():
+        text = local_templates.joinpath(template).read_text(encoding="utf-8")
+    else:
+        text = (
+            resources.files("a2a_pack.cli.templates")
+            .joinpath(template)
+            .read_text(encoding="utf-8")
+        )
     for key, value in vars.items():
         text = text.replace("{{ " + key + " }}", value)
     return text