• .vscode/settings.json
  • Added a directory filter to exclude the new compatibility test directory from gopls UI.
• a2aclient/agentcard/resolver.go
  • Introduced a Parser type and DefaultCardParser for custom AgentCard unmarshaling.
  • Updated DefaultResolver and Resolver struct to include the new CardParser field.
  • Modified the Resolve method to utilize the configurable CardParser for processing AgentCard responses.
• a2aclient/jsonrpc.go
  • Removed internal jsonrpcRequest and jsonrpcResponse structs.
  • Updated client-side JSON-RPC request and response handling to use centralized types from internal/jsonrpc.
• a2aclient/jsonrpc_test.go
  • Updated test helper functions and test cases to reflect the use of jsonrpc.ClientRequest and jsonrpc.ClientResponse.
• a2acompat/a2av0/agentcard.go
  • Added NewAgentCardParser to convert v0.3 AgentCards to v1.0 format.
  • Added NewStaticAgentCardProducer and NewAgentCardProducer to serialize v1.0 AgentCards into a union of v1.0 and v0.3 formats.
  • Implemented extensive mapping functions for converting between v0.3 and v1.0 AgentCard structures, including security schemes, interfaces, and skills.
  • Defined v0.3 specific agentCard and related structs for compatibility.
• a2acompat/a2av0/agentcard_test.go
  • Added unit tests for AgentCard compatibility, covering conversions from new-to-new, compat-to-new, and old-to-new formats.
• a2acompat/a2av0/conversions.go
  • Added comprehensive conversion functions between v1.0 (a2a) and v0.3 (a2av0) types for tasks, messages, events, and push configurations.
• a2acompat/a2av0/doc.go
  • Updated copyright year to 2026.
  • Removed the ProtocolVersion type alias, directly using a2a.ProtocolVersion.
• a2acompat/a2av0/jsonrpc.go
  • Added constants for JSON-RPC method names specific to the v0.3 protocol.
• a2acompat/a2av0/jsonrpc_client.go
  • Added a new JSON-RPC client transport implementation for v0.3, including methods for sending messages, streaming, task management, and push notification configuration.
  • Integrated conversion functions to translate between v1.0 and v0.3 data structures for client requests and responses.
• a2acompat/a2av0/jsonrpc_server.go
  • Added a new JSON-RPC server handler for v0.3, capable of processing various A2A methods and streaming requests.
  • Incorporated conversion logic to handle incoming v0.3 requests and outgoing v0.3 responses.
• a2acompat/a2av0/types.go
  • Defined v0.3 specific data structures for messages, tasks, events, content parts, and various request/response parameters.
  • Implemented custom JSON marshaling and unmarshaling logic for these v0.3 types to ensure proper serialization and deserialization.
• a2asrv/agentcard.go
  • Introduced AgentCardJSONProducer interface for producers that return raw JSON.
  • Modified NewAgentCardHandler to prioritize AgentCardJSONProducer for direct JSON output, falling back to standard AgentCardProducer if not implemented.
• a2asrv/jsonrpc.go
  • Removed internal jsonrpcRequest and jsonrpcResponse structs.
  • Updated server-side JSON-RPC request and response handling to use centralized types from internal/jsonrpc.
  • Replaced internal isValidID function with jsonrpc.IsValidID.
• a2asrv/jsonrpc_test.go
  • Updated test cases to use jsonrpc.ServerRequest for JSON-RPC request payloads.
• e2e/compat/compat_test.go
  • Added end-to-end compatibility tests to validate interaction between new and old A2A clients and servers.
  • Included scenarios for an old client communicating with a new server and a new client communicating with an old server.
• e2e/compat/v0_3/go.mod
  • Added a new Go module file for the v0.3 compatibility test binary, specifying github.com/a2aproject/a2a-go v0.3.6 as a dependency.
• e2e/compat/v0_3/go.sum
  • Added a new Go sum file for the v0.3 compatibility test binary, listing module checksums.
• e2e/compat/v0_3/main.go
  • Added a main application for the v0.3 compatibility test binary, implementing both client and server modes for testing against different versions of the A2A SDK.
• internal/jsonrpc/jsonrpc.go
  • Added IsValidID function for validating JSON-RPC request IDs.
  • Defined new centralized structs: ServerRequest, ServerResponse, ClientRequest, and ClientResponse to standardize JSON-RPC type definitions across the SDK.

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