Steps / Chain-of-Thought | PraisonAIUI Docs

Steps / Chain-of-ThoughtVisualize agent reasoning and tool calls as collapsible, nested steps in the chat interface.Basic UsageNested StepsSteps can be nested to show hierarchical reasoning:Step TypesCommon step patterns:Frontend VisualizationSteps appear in the chat as collapsible panels showing:Icons indicating step type (🔧 🧠 🤖 📚 ⚡)Expandable content with input/output detailsNested hierarchy for complex reasoning chainsReal-time updates as steps stream contentAPI Reference`aiui.Step(name, type="reasoning", parent=None, metadata={})`Parameters:name (str): Display name for the steptype (StepType, optional): Step type - one of "tool_call", "reasoning", "sub_agent", "retrieval", "custom" (default: "reasoning")parent (Step, optional): Parent step for nestingmetadata (dict, optional): Additional step metadataMethods:async stream_token(token): Stream content to the stepContext manager protocol: async with step: ...`@aiui.step(name, type="reasoning", **metadata)`Decorator Parameters:name (str): Display name for the steptype (StepType, optional): Step type (default: "reasoning")**metadata: Additional metadata to include with the stepUsage:Events EmittedSteps emit these RunEventType events:REASONING_STARTED: Step begins (includes step_type, parent_id, metadata)REASONING_STEP: Content streamed (includes step_type)REASONING_COMPLETED: Step finishes (includes step_type, duration, error, metadata)