Manual update spec

[holtskinner]

Description

Thank you for opening a Pull Request!
Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Follow the CONTRIBUTING Guide.
• Make your Pull Request title in the https://www.conventionalcommits.org/ specification.
  • Important Prefixes for release-please:
    • fix: which represents bug fixes, and correlates to a SemVer patch.
    • feat: represents a new feature, and correlates to a SemVer minor.
    • feat!:, or fix!:, refactor!:, etc., which represent a breaking change (indicated by the !) and will result in a SemVer major.
• Ensure the tests and linter pass (Run bash scripts/format.sh from the repository root to format)
• Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Summary of Changes

Hello @holtskinner, 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 updates the a2a.types module, which contains the Python data models for the A2A specification. The changes reflect an evolution of the specification, primarily focusing on enhancing data validation through stricter type annotations and minimum length constraints for lists, introducing a new API method for authenticated extended agent cards, and improving versioning clarity.

Highlights

• Specification Update: The src/a2a/types.py file, which is code-generated from a specification, has been manually updated to reflect changes in the underlying A2A specification, including a change in the source branch used for generation.
• Improved Data Validation: Numerous string fields representing URLs have been updated to pydantic.AnyUrl for stricter validation, ensuring that these fields contain valid URL formats. Additionally, several list fields now enforce a min_length of 1, preventing empty lists where content is expected.
• New JSON-RPC Method: A new JSON-RPC method, agent/getAuthenticatedExtendedCard, has been introduced. This includes the definition of its corresponding request, a new success response type (GetAuthenticatedExtendedCardSuccessResponse), and a new specific error type (AuthenticatedExtendedCardNotConfiguredError).
• Semantic Versioning Enforcement: The AgentCard.version field now includes a regex pattern constraint, enforcing adherence to Semantic Versioning for agent versions.
• Type Refinements: The TaskStatus.timestamp field has been updated from a generic str to datetime for more accurate and robust date/time handling.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in issue comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments or fill out our survey to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request updates the Pydantic models in src/a2a/types.py by regenerating them from an updated specification. The changes introduce stricter validation by using AnyUrl and datetime types, enforcing non-empty lists with min_length=1, and adding a regex pattern for semantic versioning.

A new JSON-RPC method agent/getAuthenticatedExtendedCard is also defined, but the server-side implementation appears to be missing.

[gemini-code-assist]

This change adds GetAuthenticatedExtendedCardRequest to the A2ARequest discriminated union. It seems the corresponding server-side logic to handle this new request type is missing. Without a handler, any request of this new type will result in an UnsupportedOperationError.

Please ensure that the server-side implementation is added, or clarify if it's intended for a future PR.