Update a2a-pack minimum to 0.1.56

agent.py

@@ -294,4 +294,4 @@ def _build_failure_error(exc: BaseException) -> str:
             "or a smaller build scope"
         )
     return f"build graph failed: {type(exc).__name__}: {exc}"
-# rebuild against a2a-pack 0.1.47 for manifest-backed meta-agent defaults
+# rebuild against a2a-pack 0.1.56 for manifest-backed meta-agent defaults

agent_builder/tools.py

@@ -30,7 +30,7 @@ if TYPE_CHECKING:
     from .config import Settings
 
 
-A2A_PACK_MIN_VERSION = "0.1.53"
+A2A_PACK_MIN_VERSION = "0.1.56"
 
 
 @dataclass(frozen=True)

requirements.txt

@@ -1,4 +1,4 @@
-a2a-pack>=0.1.53
+a2a-pack>=0.1.56
 httpx>=0.27
 boto3>=1.34
 deepagents>=0.5.0