feat(agent): Add Support for Google's Agent2Agent (A2A) Protocol

[Appointat]

Context: Google Cloud recently announced the Agent2Agent (A2A) protocol on April 9, 2025. As described in their announcement (link), A2A is a new, open protocol designed to allow AI agents to communicate, securely exchange information, and coordinate actions, even if built by different vendors or using different frameworks.

Motivation: The A2A protocol aims to enable a multi-agent ecosystem, allowing agents to collaborate across siloed systems and applications. Integrating A2A support into our project would:

1. Enhance Interoperability: Allow our agents to communicate and collaborate with a potentially wide range of external agents built using the A2A standard (supported by partners like Atlassian, Salesforce, SAP, ServiceNow, Langchain, etc.).
2. Enable Complex Workflows: Facilitate the automation of more complex tasks that require coordination across multiple specialized agents or enterprise platforms.
3. Future-Proofing: Align our agent capabilities with an emerging open standard backed by Google and numerous industry partners.
4. Leverage Standard Features: Utilize A2A's built-in capabilities for capability discovery, task management (including long-running tasks), secure communication, and user experience negotiation across different modalities.

Proposed Solution: Investigate and implement support for the Agent2Agent (A2A) protocol. This would likely involve:

• Understanding the A2A specification (draft available on the A2A website mentioned in the announcement).
• Implementing the necessary components for our agents to potentially act as both A2A clients (initiating tasks) and A2A remote agents (responding to tasks).
• Ensuring compliance with A2A's design principles (built on existing standards like HTTP/JSON-RPC, security, handling long-running tasks, modality agnostic).

Resources:

• A2A Announcement Details: Based on the Google Developers Blog post dated April 9, 2025.