A2A Error Handling

Before writing code

Fetch live docs:

1. Fetch https://a2a-protocol.org/latest/specification/ for the error handling section
2. Web-search site:github.com a2aproject A2A error codes for error code definitions
3. Web-search site:github.com a2aproject a2a-samples error for error handling examples
4. Fetch SDK docs for error classes and exception types

Conceptual Architecture

Error Categories

A2A has three categories of errors:

1. JSON-RPC Protocol Errors — Malformed requests, invalid methods, parse failures
2. A2A-Specific Errors — Protocol-level issues specific to A2A operations
3. Task-Level Failures — The task itself fails during processing (task state → failed)