React Loop With Memory And Callback Hooks

Hugging Face's lightweight agent framework — code-as-action, minimal abstraction, MCP support.

Unique: Implements ReAct as a minimal, callback-driven loop in MultiStepAgent where memory is a simple list and lifecycle events fire through AgentLogger/Monitor, avoiding heavy instrumentation frameworks. This design keeps the core loop transparent and hackable while enabling rich observability through optional callbacks.

vs others: Simpler and more transparent than LangChain's agent executors because memory is a plain list and callbacks are explicit, making it easier to understand agent behavior and implement custom monitoring without framework magic.