A2A SDK is a developer toolkit for building, chaining, and managing AI agents in Python. It provides APIs to define agent behaviors via prompts or code, connect agents into pipelines or workflows, and enable asynchronous message passing. Integrations with OpenAI, Llama, Redis, and REST services allow agents to fetch data, call functions, and store state. A built-in UI monitors agent activity, while the modular design ensures you can extend or replace components to fit custom use cases.

Saiki is an open-source agent orchestration framework that empowers developers to build complex AI-driven workflows by writing declarative YAML definitions. Each agent can perform tasks, call external services, or invoke other agents in a chained sequence. Saiki provides a built-in REST API server, execution tracing, detailed log output, and a web-based dashboard for real-time monitoring. It supports retries, fallbacks, and custom extensions, making it easy to iterate, debug, and scale robust automation pipelines.