Description

As part of the v1.0 release, deprecated fields should be removed from a2a.proto since this is a major version change and provides a clean break for backward compatibility.

Deprecated Fields to Remove

The following fields in the AgentCard message are currently deprecated and should be removed:

1. url (field 3) - deprecated in favor of supported_interfaces
2. preferred_transport (field 14) - deprecated in favor of supported_interfaces
3. additional_interfaces (field 15) - deprecated in favor of supported_interfaces

All three fields were replaced by the supported_interfaces field (field 19).

Location

File: specification/grpc/a2a.proto
Lines: 391-395

Action Items

• Remove the three deprecated fields from the AgentCard message
• Update any documentation that references these deprecated fields
• Consider if any migration guide notes are needed in the changelog

Context

The v0.3 to v1.0 update is a major version change, making this an appropriate time to clean up deprecated fields and simplify the protocol definition.