🤖 I have created a release *beep* *boop*
---


##
[1.0.0-alpha.1](v1.0.0-alpha.0...v1.0.0-alpha.1)
(2026-04-10)


### ⚠ BREAKING CHANGES

* **client:** make ClientConfig.push_notification_config singular
([#955](#955))
* **client:** reorganize ClientFactory API
([#947](#947))
* **server:** add build_user function to DefaultContextBuilder to allow
A2A user creation customization
([#925](#925))
* **client:** remove `ClientTaskManager` and `Consumers` from client
([#916](#916))
* **server:** migrate from Application wrappers to Starlette route-based
endpoints for rest
([#892](#892))
* **server:** migrate from Application wrappers to Starlette route-based
endpoints for jsonrpc
([#873](#873))

### Features

* A2A Version Header validation on server side.
([#865](#865))
([b261ceb](b261ceb))
* Add GetExtendedAgentCard Support to RequestHandlers
([#919](#919))
([2159140](2159140))
* Add support for more Task Message and Artifact fields in the Vertex
Task Store ([#936](#936))
([605fa49](605fa49))
* Create EventQueue interface and make tap() async.
([#914](#914))
([9ccf99c](9ccf99c)),
closes [#869](#869)
* EventQueue - unify implementation between python versions
([#877](#877))
([7437b88](7437b88)),
closes [#869](#869)
* EventQueue is now a simple interface with single enqueue_event method.
([#944](#944))
([f0e1d74](f0e1d74))
* Implementation of DefaultRequestHandlerV2
([#933](#933))
([462eb3c](462eb3c)),
closes [#869](#869)
* InMemoryTaskStore creates a copy of Task by default to make it
consistent with database task stores
([#887](#887))
([8c65e84](8c65e84)),
closes [#869](#869)
* merge metadata of new and old artifact when append=True
([#945](#945))
([cc094aa](cc094aa))
* **server:** add async context manager support to EventQueue
([#743](#743))
([f68b22f](f68b22f))
* **server:** validate presence according to `google.api.field_behavior`
annotations
([#870](#870))
([4586c3e](4586c3e))
* Simplify ActiveTask.subscribe()
([#958](#958))
([62e5e59](62e5e59))
* Support AgentExectuor enqueue of a Task object.
([#960](#960))
([12ce017](12ce017))
* Support Message-only simplified execution without creating Task
([#956](#956))
([354fdfb](354fdfb))
* Unhandled exception in AgentExecutor marks task as failed
([#943](#943))
([4fc6b54](4fc6b54))


### Bug Fixes

* Add `packaging` to base dependencies
([#897](#897))
([7a9aec7](7a9aec7))
* **client:** do not mutate SendMessageRequest in
BaseClient.send_message
([#949](#949))
([94537c3](94537c3))
* fix `athrow()` RuntimeError on streaming responses
([#912](#912))
([ca7edc3](ca7edc3))
* fix docstrings related to `CallContextBuilder` args in constructors
and make ServerCallContext mandatory in `compat` folder
([#907](#907))
([9cade9b](9cade9b))
* fix error handling for gRPC and SSE streaming
([#879](#879))
([2b323d0](2b323d0))
* fix JSONRPC error handling
([#957](#957))
([6c807d5](6c807d5))
* fix REST error handling
([#893](#893))
([405be3f](405be3f))
* handle SSE errors occurred after stream started
([#894](#894))
([3a68d8f](3a68d8f))
* remove the use of deprecated types from VertexTaskStore
([#889](#889))
([6d49122](6d49122))
* Remove unconditional SQLAlchemy dependency from SDK core
([#898](#898))
([ab762f0](ab762f0)),
closes [#883](#883)
* remove unused import and request for FastAPI in pyproject
([#934](#934))
([fe5de77](fe5de77))
* replace stale entry in a2a.types.__all__ with actual import name
([#902](#902))
([05cd5e9](05cd5e9))
* wrong method name for ExtendedAgentCard endpoint in JsonRpc compat
version ([#931](#931))
([5d22186](5d22186))


### Documentation

* add Database Migration Documentation
([#864](#864))
([fd12dff](fd12dff))


### Miscellaneous Chores

* release 1.0.0-alpha.1
([a61f6d4](a61f6d4))


### Code Refactoring

* **client:** make ClientConfig.push_notification_config singular
([#955](#955))
([be4c5ff](be4c5ff))
* **client:** remove `ClientTaskManager` and `Consumers` from client
([#916](#916))
([97058bb](97058bb)),
closes [#734](#734)
* **client:** reorganize ClientFactory API
([#947](#947))
([01b3b2c](01b3b2c))
* **server:** add build_user function to DefaultContextBuilder to allow
A2A user creation customization
([#925](#925))
([2648c5e](2648c5e))
* **server:** migrate from Application wrappers to Starlette route-based
endpoints for jsonrpc
([#873](#873))
([734d062](734d062))
* **server:** migrate from Application wrappers to Starlette route-based
endpoints for rest
([#892](#892))
([4be2064](4be2064))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).