Merge branch 'main' into make-fastapi-package-optional

Author: darkhaniop

.github/workflows/unit-tests.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Set postgres for tests
         run: |
           sudo apt-get update && sudo apt-get install -y postgresql-client
-          PGPASSWORD=postgres psql -h localhost -p 5432 -U postgres -d a2a_test -f ${{ github.workspace }}/docker/postgres/init.sql
+          PGPASSWORD=postgres psql -h localhost -p 5432 -U postgres -d a2a_test -f ${{ github.workspace }}/tests/docker/postgres/init.sql
           export POSTGRES_TEST_DSN="postgresql+asyncpg://postgres:postgres@localhost:5432/a2a_test"
 
       - name: Install uv

CHANGELOG.md

@@ -1,5 +1,25 @@
 # Changelog
 
+## [0.2.12](https://github.com/a2aproject/a2a-python/compare/v0.2.11...v0.2.12) (2025-07-14)
+
+
+### Features
+
+* add `metadata` property to `RequestContext` ([#302](https://github.com/a2aproject/a2a-python/issues/302)) ([e781ced](https://github.com/a2aproject/a2a-python/commit/e781ced3b082ef085f9aeef02ceebb9b35c68280))
+* add A2ABaseModel ([#292](https://github.com/a2aproject/a2a-python/issues/292)) ([24f2eb0](https://github.com/a2aproject/a2a-python/commit/24f2eb0947112539cbd4e493c98d0d9dadc87f05))
+* add support for notification tokens in PushNotificationSender ([#266](https://github.com/a2aproject/a2a-python/issues/266)) ([75aa4ed](https://github.com/a2aproject/a2a-python/commit/75aa4ed866a6b4005e59eb000e965fb593e0888f))
+* Update A2A types from specification 🤖 ([#289](https://github.com/a2aproject/a2a-python/issues/289)) ([ecb321a](https://github.com/a2aproject/a2a-python/commit/ecb321a354d691ca90b52cc39e0a397a576fd7d7))
+
+
+### Bug Fixes
+
+* add proper a2a request body documentation to Swagger UI ([#276](https://github.com/a2aproject/a2a-python/issues/276)) ([4343be9](https://github.com/a2aproject/a2a-python/commit/4343be99ad0df5eb6908867b71d55b1f7d0fafc6)), closes [#274](https://github.com/a2aproject/a2a-python/issues/274)
+* Handle asyncio.cancellederror and raise to propagate back ([#293](https://github.com/a2aproject/a2a-python/issues/293)) ([9d6cb68](https://github.com/a2aproject/a2a-python/commit/9d6cb68a1619960b9c9fd8e7aa08ffb27047343f))
+* Improve error handling in task creation ([#294](https://github.com/a2aproject/a2a-python/issues/294)) ([6412c75](https://github.com/a2aproject/a2a-python/commit/6412c75413e26489bd3d33f59e41b626a71807d3))
+* Resolve dependency issue with sql stores ([#303](https://github.com/a2aproject/a2a-python/issues/303)) ([2126828](https://github.com/a2aproject/a2a-python/commit/2126828b5cb6291f47ca15d56c0e870950f17536))
+* Send push notifications for message/send ([#298](https://github.com/a2aproject/a2a-python/issues/298)) ([0274112](https://github.com/a2aproject/a2a-python/commit/0274112bb5b077c17b344da3a65277f2ad67d38f))
+* **server:** Improve event consumer error handling ([#282](https://github.com/a2aproject/a2a-python/issues/282)) ([a5786a1](https://github.com/a2aproject/a2a-python/commit/a5786a112779a21819d28e4dfee40fa11f1bb49a))
+
 ## [0.2.11](https://github.com/a2aproject/a2a-python/compare/v0.2.10...v0.2.11) (2025-07-07)
 
 

src/a2a/server/agent_execution/context.py

@@ -1,5 +1,7 @@
 import uuid
 
+from typing import Any
+
 from a2a.server.context import ServerCallContext
 from a2a.types import (
     InvalidParamsError,
@@ -134,6 +136,13 @@ def call_context(self) -> ServerCallContext | None:
         """The server call context associated with this request."""
         return self._call_context
 
+    @property
+    def metadata(self) -> dict[str, Any]:
+        """Metadata associated with the request, if available."""
+        if not self._params:
+            return {}
+        return self._params.metadata or {}
+
     def _check_or_generate_task_id(self) -> None:
         """Ensures a task ID is present, generating one if necessary."""
         if not self._params:

src/a2a/server/tasks/__init__.py

@@ -1,9 +1,10 @@
 """Components for managing tasks within the A2A server."""
 
+import logging
+
 from a2a.server.tasks.base_push_notification_sender import (
     BasePushNotificationSender,
 )
-from a2a.server.tasks.database_task_store import DatabaseTaskStore
 from a2a.server.tasks.inmemory_push_notification_config_store import (
     InMemoryPushNotificationConfigStore,
 )
@@ -18,6 +19,30 @@
 from a2a.server.tasks.task_updater import TaskUpdater
 
 
+logger = logging.getLogger(__name__)
+
+try:
+    from a2a.server.tasks.database_task_store import (
+        DatabaseTaskStore,  # type: ignore
+    )
+except ImportError as e:
+    _original_error = e
+    # If the database task store is not available, we can still use in-memory stores.
+    logger.debug(
+        'DatabaseTaskStore not loaded. This is expected if database dependencies are not installed. Error: %s',
+        e,
+    )
+
+    class DatabaseTaskStore:  # type: ignore
+        """Placeholder for DatabaseTaskStore when dependencies are not installed."""
+
+        def __init__(self, *args, **kwargs):
+            raise ImportError(
+                'To use DatabaseTaskStore, its dependencies must be installed. '
+                'You can install them with \'pip install "a2a-sdk[sql]"\''
+            ) from _original_error
+
+
 __all__ = [
     'BasePushNotificationSender',
     'DatabaseTaskStore',

src/a2a/utils/task.py

@@ -15,7 +15,16 @@ def new_task(request: Message) -> Task:
 
     Returns:
         A new `Task` object initialized with 'submitted' status and the input message in history.
+
+    Raises:
+        TypeError: If the message role is None.
+        ValueError: If the message parts are empty.
     """
+    if not request.role:
+        raise TypeError('Message role cannot be None')
+    if not request.parts:
+        raise ValueError('Message parts cannot be empty')
+
     return Task(
         status=TaskStatus(state=TaskState.submitted),
         id=(request.taskId if request.taskId else str(uuid.uuid4())),