chore(1.0-dev): release 1.0.0-alpha.1

[a2a-bot]

🤖 I have created a release beep boop

1.0.0-alpha.1 (2026-04-09)

⚠ BREAKING CHANGES

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

Features

• A2A Version Header validation on server side. (#865) (b261ceb)
• Add GetExtendedAgentCard Support to RequestHandlers (#919) (2159140)
• Add support for more Task Message and Artifact fields in the Vertex Task Store (#908) (5e0dcd7)
• Add support for more Task Message and Artifact fields in the Vertex Task Store (#936) (605fa49)
• Create EventQueue interface and make tap() async. (#914) (9ccf99c), closes #869
• EventQueue - unify implementation between python versions (#877) (7437b88), closes #869
• EventQueue is now a simple interface with single enqueue_event method. (#944) (f0e1d74)
• Implementation of DefaultRequestHandlerV2 (#933) (462eb3c), closes #869
• InMemoryTaskStore creates a copy of Task by default to make it consistent with database task stores (#887) (8c65e84), closes #869
• merge metadata of new and old artifact when append=True (#945) (cc094aa)
• server: add async context manager support to EventQueue (#743) (f68b22f)
• server: validate presence according to google.api.field_behavior annotations (#870) (4586c3e)
• Unhandled exception in AgentExecutor marks task as failed (#943) (4fc6b54)

Bug Fixes

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

Documentation

• add Database Migration Documentation (#864) (fd12dff)

Miscellaneous Chores

• release 1.0.0-alpha.1 (a61f6d4)

Code Refactoring

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

---

This PR was generated with Release Please. See documentation.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request represents an automated release for version "1.1.0-alpha.0", generated by Release Please. It incorporates a new feature that introduces asynchronous context manager support for the EventQueue in the server, enhancing its capabilities.

Highlights

• Version Update: The project's version has been incremented to "1.1.0-alpha.0" as part of this release.
• New Feature: Asynchronous context manager support has been added to the EventQueue within the server component.

Ignored Files

• Ignored by pattern: CHANGELOG.md (1)
  • CHANGELOG.md

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[gemini-code-assist]

Code Review

This pull request is an automated release for version 1.1.0-alpha.0, generated by release-please. The change updates the version in .release-please-manifest.json, which is consistent with the release process.

[ishymko]

Safety net blocking comment.

[github-actions]

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