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Introduction Quickstart Build with agents

Concepts

Architecture Generative UI OSS vs Enterprise

Agentic Protocols

Build Chat UIs

CSS Customization Slots (Subcomponents)Fully Headless UI Reasoning Messages

Multimodal Attachments Voice Reasoning

Build Generative UI

Components as Tools Tool Call Rendering State Rendering

Add Agent Powers

Frontend Tools Shared State

Human-in-the-Loop

Sub-Agents Agent Config Programmatic Control

Runtime

Copilot Runtime Use any model router Connect AG-UI agents Deploy to any runtime Authentication

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Inspector VS Code Extension

Enterprise

How the Enterprise Intelligence Platform Works How Threads & Persistence Work Observability Self-Hosting Intelligence Threads

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Platforms

Other

Anonymous Telemetry

Docs Custom Look and FeelSlots (Subcomponents)

Slots (Subcomponents)

Customize any part of the chat UI by overriding individual sub-components via slots.

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What is this?What it looks like in code Welcome screen slot Assistant message slot Disclaimer slot Tailwind Classes Props Override Custom Components Nested Slots (Drill-Down)Two levels deep Three levels deep Labels Available Slots CopilotChat / CopilotSidebar / CopilotPopup

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