Update to specification from 1e5f46206403982cc629a0dad535856b28c269aa

[a2a-bot]

Commit: a2aproject/A2A@1e5f462

[gemini-code-assist]

Summary of Changes

Hello @a2a-bot, 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 brings a significant update to the A2A protocol specification, focusing on enhancing clarity, consistency, and functionality. It introduces tenant-aware operations across various API calls, renames several fields and methods to improve semantic meaning, and refines field requirements for better data integrity. Key additions include a new task listing capability and an extended agent card retrieval, alongside updated documentation to reflect these changes and align with the latest protocol version.

Highlights

• API Field Renames and Requirements: Several fields across various message types have been renamed for clarity and consistency (e.g., 'push_notification' to 'push_notification_config', 'mime_type' to 'media_type', 'content' to 'parts', 'update' to 'message'). Additionally, many fields have been explicitly marked as required, ensuring stricter data validation.
• Introduction of Tenant-Aware Operations: A new 'tenant' field has been added to several request messages (e.g., SendMessageRequest, GetTaskRequest, CancelTaskRequest) and AgentInterface, indicating support for multi-tenancy within the A2A protocol. Corresponding HTTP annotations have been updated to include tenant paths.
• New Task Listing and Extended Agent Card Functionality: New ListTasksRequest and ListTasksResponse message types have been introduced, along with a ListTasks gRPC method, enabling retrieval of tasks with filtering and pagination. The GetAgentCard method has been renamed to GetExtendedAgentCard, suggesting an enhanced agent card retrieval mechanism.
• Updated Task Push Notification and Subscription Mechanisms: The CreateTaskPushNotificationConfig method has been renamed to SetTaskPushNotificationConfig, and TaskSubscriptionRequest to SubscribeToTaskRequest, reflecting a more precise naming convention for these operations. Documentation for SubscribeToTask now clarifies behavior for tasks in terminal states.
• Refined Documentation and Specification Versioning: Documentation for various identifier fields (e.g., id, context_id, task_id, artifact_id) has been updated to remove redundant examples like '(e.g. UUID)' and to use 'identifier' for consistency. The datamodel-codegen reference has been updated to v0.3.0 of the A2A specification.

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Code Review

This pull request updates generated code to align with version 0.3.0 of the A2A specification. This update introduces significant breaking changes, including renamed RPC methods and message fields, and adds new features. While the generated files themselves appear correct, the PR is critically incomplete because it does not update the client, server, and test code that consumes this generated code. This will cause the build to fail. To proceed, the PR must be updated to include all necessary changes in the dependent files to ensure they are compatible with the new specification.