layout	default
title	CopilotKit Tutorial - Chapter 4: Chat Components
nav_order	4
has_children	false
parent	CopilotKit Tutorial

Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar

Welcome to Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar. In this part of CopilotKit Tutorial: Building AI Copilots for React Applications, you will build an intuitive mental model first, then move into concrete implementation details and practical production tradeoffs.

Master CopilotKit's chat UI components for creating conversational AI interfaces in your React applications.

Overview

CopilotKit provides pre-built chat components that make it easy to add conversational AI interfaces to your applications. This chapter covers CopilotSidebar, CopilotChat, and how to customize these components.

CopilotSidebar Component

Basic Sidebar Implementation

// app/components/BasicSidebar.tsx
"use client";

import { CopilotSidebar } from "@copilotkit/react-ui";
import { useCopilotReadable, useCopilotAction } from "@copilotkit/react-core";

export function BasicSidebar() {
  const [messages, setMessages] = useState<string[]>([]);

  // Share conversation history
  useCopilotReadable({
    description: "The conversation history with the user",
    value: messages,
  });

  // Action to add a message
  useCopilotAction({
    name: "addMessage",
    description: "Add a message to the conversation",
    parameters: [
      {
        name: "message",
        type: "string",
        description: "The message content to add",
        required: true,
      },
    ],
    handler: async ({ message }) => {
      setMessages(prev => [...prev, message]);
      return { success: true, messageCount: messages.length + 1 };
    },
  });

  return (
    <CopilotSidebar
      defaultOpen={true}
      clickOutsideToClose={false}
    >
      <div className="p-6">
        <h1 className="text-2xl font-bold mb-4">Basic Chat Interface</h1>

        <div className="space-y-4">
          <div className="bg-blue-50 p-4 rounded-lg">
            <h3 className="font-semibold text-blue-900 mb-2">Conversation History</h3>
            {messages.length === 0 ? (
              <p className="text-blue-700">No messages yet. Start a conversation!</p>
            ) : (
              <ul className="space-y-1">
                {messages.map((message, index) => (
                  <li key={index} className="text-blue-800 text-sm">
                    • {message}
                  </li>
                ))}
              </ul>
            )}
          </div>

          <div className="bg-green-50 p-4 rounded-lg">
            <h3 className="font-semibold text-green-900 mb-2">Try These Commands:</h3>
            <ul className="text-green-800 text-sm space-y-1">
              <li>• "Add a message saying 'Hello from the sidebar!'"</li>
              <li>• "Add three messages about different topics"</li>
              <li>• "Show me how many messages we have"</li>
            </ul>
          </div>
        </div>
      </div>
    </CopilotSidebar>
  );
}

Sidebar Customization

// app/components/CustomSidebar.tsx
"use client";

import { CopilotSidebar } from "@copilotkit/react-ui";
import { useCopilotReadable, useCopilotAction } from "@copilotkit/react-core";
import { useState } from "react";

export function CustomSidebar() {
  const [sidebarOpen, setSidebarOpen] = useState(false);
  const [theme, setTheme] = useState<"light" | "dark">("light");

  // Share sidebar state
  useCopilotReadable({
    description: "Current sidebar visibility and theme settings",
    value: { isOpen: sidebarOpen, theme },
  });

  // Action to control sidebar
  useCopilotAction({
    name: "toggleSidebar",
    description: "Open or close the sidebar",
    parameters: [
      {
        name: "action",
        type: "string",
        description: "Action to perform: 'open', 'close', or 'toggle'",
        enum: ["open", "close", "toggle"],
        default: "toggle",
      },
    ],
    handler: async ({ action }) => {
      if (action === "open") {
        setSidebarOpen(true);
      } else if (action === "close") {
        setSidebarOpen(false);
      } else if (action === "toggle") {
        setSidebarOpen(prev => !prev);
      }

      return { success: true, isOpen: sidebarOpen };
    },
  });

  // Action to change theme
  useCopilotAction({
    name: "changeTheme",
    description: "Change the sidebar theme",
    parameters: [
      {
        name: "newTheme",
        type: "string",
        description: "New theme to apply",
        enum: ["light", "dark"],
        required: true,
      },
    ],
    handler: async ({ newTheme }) => {
      setTheme(newTheme);
      return { success: true, theme: newTheme };
    },
  });

  return (
    <div className={`min-h-screen ${theme === "dark" ? "bg-gray-900 text-white" : "bg-gray-50 text-gray-900"}`}>
      {/* Custom trigger button */}
      <button
        onClick={() => setSidebarOpen(true)}
        className="fixed top-4 right-4 z-50 px-4 py-2 bg-blue-500 text-white rounded-lg shadow-lg hover:bg-blue-600"
      >
        Open AI Assistant
      </button>

      <CopilotSidebar
        open={sidebarOpen}
        onOpenChange={setSidebarOpen}
        className={theme === "dark" ? "dark" : ""}
      >
        <div className="p-6">
          <div className="flex justify-between items-center mb-6">
            <h1 className="text-2xl font-bold">Custom AI Assistant</h1>
            <div className="flex gap-2">
              <button
                onClick={() => setTheme(theme === "light" ? "dark" : "light")}
                className="px-3 py-1 text-sm bg-gray-200 rounded hover:bg-gray-300"
              >
                {theme === "light" ? "🌙" : "☀️"}
              </button>
              <button
                onClick={() => setSidebarOpen(false)}
                className="px-3 py-1 text-sm bg-red-200 text-red-800 rounded hover:bg-red-300"
              >
                ✕
              </button>
            </div>
          </div>

          <div className="space-y-4">
            <div className={`p-4 rounded-lg ${theme === "dark" ? "bg-gray-800" : "bg-blue-50"}`}>
              <h3 className={`font-semibold mb-2 ${theme === "dark" ? "text-blue-300" : "text-blue-900"}`}>
                Current Settings
              </h3>
              <div className={`text-sm ${theme === "dark" ? "text-gray-300" : "text-gray-700"}`}>
                <p>Theme: {theme}</p>
                <p>Sidebar: {sidebarOpen ? "Open" : "Closed"}</p>
              </div>
            </div>

            <div className={`p-4 rounded-lg ${theme === "dark" ? "bg-gray-800" : "bg-green-50"}`}>
              <h3 className={`font-semibold mb-2 ${theme === "dark" ? "text-green-300" : "text-green-900"}`}>
                Try These Commands:
              </h3>
              <ul className={`text-sm space-y-1 ${theme === "dark" ? "text-gray-300" : "text-green-800"}`}>
                <li>• "Toggle the sidebar"</li>
                <li>• "Change theme to dark"</li>
                <li>• "Close the sidebar"</li>
                <li>• "What theme are we using?"</li>
              </ul>
            </div>
          </div>
        </div>
      </CopilotSidebar>

      {/* Main content */}
      <main className="p-8">
        <div className="max-w-2xl mx-auto">
          <h1 className="text-4xl font-bold mb-6">Welcome to AI-Powered App</h1>
          <p className={`text-lg mb-8 ${theme === "dark" ? "text-gray-300" : "text-gray-600"}`}>
            Click the "Open AI Assistant" button to start chatting with AI about your application.
          </p>

          <div className={`p-6 rounded-lg ${theme === "dark" ? "bg-gray-800" : "bg-white"} shadow-lg`}>
            <h2 className="text-2xl font-semibold mb-4">Features</h2>
            <ul className={`space-y-2 ${theme === "dark" ? "text-gray-300" : "text-gray-700"}`}>
              <li>✅ AI-powered chat interface</li>
              <li>✅ Customizable themes</li>
              <li>✅ Context-aware conversations</li>
              <li>✅ Voice and text input</li>
            </ul>
          </div>
        </div>
      </main>
    </div>
  );
}

CopilotChat Component

Inline Chat Implementation

// app/components/InlineChat.tsx
"use client";

import { CopilotChat } from "@copilotkit/react-ui";
import { useCopilotReadable, useCopilotAction } from "@copilotkit/react-core";
import { useState } from "react";

interface Document {
  id: string;
  title: string;
  content: string;
  category: string;
}

export function InlineChat() {
  const [documents, setDocuments] = useState<Document[]>([
    {
      id: "1",
      title: "Getting Started Guide",
      content: "Welcome to our platform. This guide will help you get started...",
      category: "tutorial"
    },
    {
      id: "2",
      title: "API Reference",
      content: "Complete API reference for developers...",
      category: "reference"
    }
  ]);

  // Share documents for AI context
  useCopilotReadable({
    description: "Available documentation and knowledge base articles",
    value: documents,
  });

  // Action to search documents
  useCopilotAction({
    name: "searchDocuments",
    description: "Search through available documents",
    parameters: [
      {
        name: "query",
        type: "string",
        description: "Search query to find relevant documents",
        required: true,
      },
      {
        name: "category",
        type: "string",
        description: "Optional category filter",
        enum: ["tutorial", "reference", "guide"],
      },
    ],
    handler: async ({ query, category }) => {
      let results = documents.filter(doc =>
        doc.title.toLowerCase().includes(query.toLowerCase()) ||
        doc.content.toLowerCase().includes(query.toLowerCase())
      );

      if (category) {
        results = results.filter(doc => doc.category === category);
      }

      return {
        query,
        category,
        resultsCount: results.length,
        results: results.map(doc => ({
          id: doc.id,
          title: doc.title,
          category: doc.category,
          preview: doc.content.substring(0, 100) + "..."
        })),
      };
    },
  });

  // Action to add new document
  useCopilotAction({
    name: "addDocument",
    description: "Add a new document to the knowledge base",
    parameters: [
      {
        name: "title",
        type: "string",
        description: "Document title",
        required: true,
      },
      {
        name: "content",
        type: "string",
        description: "Document content",
        required: true,
      },
      {
        name: "category",
        type: "string",
        description: "Document category",
        enum: ["tutorial", "reference", "guide"],
        required: true,
      },
    ],
    handler: async ({ title, content, category }) => {
      const newDoc: Document = {
        id: Date.now().toString(),
        title,
        content,
        category,
      };

      setDocuments(prev => [...prev, newDoc]);

      return {
        success: true,
        document: {
          id: newDoc.id,
          title: newDoc.title,
          category: newDoc.category,
        },
      };
    },
  });

  return (
    <div className="min-h-screen bg-gray-50">
      {/* Header */}
      <header className="bg-white shadow-sm border-b">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex justify-between items-center py-4">
            <h1 className="text-2xl font-bold text-gray-900">Documentation Portal</h1>
            <div className="text-sm text-gray-500">
              {documents.length} documents available
            </div>
          </div>
        </div>
      </header>

      {/* Main content with inline chat */}
      <main className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">
          {/* Document list */}
          <div className="lg:col-span-2">
            <h2 className="text-xl font-semibold mb-4">Available Documents</h2>
            <div className="grid gap-4">
              {documents.map(doc => (
                <div key={doc.id} className="bg-white p-6 rounded-lg shadow-sm border">
                  <div className="flex justify-between items-start mb-2">
                    <h3 className="text-lg font-medium text-gray-900">{doc.title}</h3>
                    <span className={`px-2 py-1 text-xs rounded ${
                      doc.category === "tutorial" ? "bg-blue-100 text-blue-800" :
                      doc.category === "reference" ? "bg-green-100 text-green-800" :
                      "bg-purple-100 text-purple-800"
                    }`}>
                      {doc.category}
                    </span>
                  </div>
                  <p className="text-gray-600 text-sm">
                    {doc.content.substring(0, 150)}...
                  </p>
                </div>
              ))}
            </div>
          </div>

          {/* Inline chat */}
          <div className="lg:col-span-1">
            <div className="sticky top-8">
              <h2 className="text-xl font-semibold mb-4">AI Assistant</h2>
              <div className="bg-white rounded-lg shadow-sm border h-96">
                <CopilotChat
                  className="h-full"
                  placeholder="Ask me about the documents..."
                  showSuggestions={true}
                  suggestions={[
                    "Search for API documentation",
                    "Add a new tutorial document",
                    "Find guides about authentication"
                  ]}
                />
              </div>

              <div className="mt-4 p-3 bg-blue-50 rounded-lg">
                <h4 className="text-sm font-medium text-blue-900 mb-1">Try asking:</h4>
                <ul className="text-xs text-blue-800 space-y-1">
                  <li>• "Search for authentication guides"</li>
                  <li>• "Add a document about deployment"</li>
                  <li>• "What tutorial documents do we have?"</li>
                </ul>
              </div>
            </div>
          </div>
        </div>
      </main>
    </div>
  );
}

Advanced Chat Customization

// app/components/AdvancedChat.tsx
"use client";

import { CopilotChat } from "@copilotkit/react-ui";
import { useCopilotReadable, useCopilotAction } from "@copilotkit/react-core";
import { useState } from "react";

export function AdvancedChat() {
  const [chatMode, setChatMode] = useState<"casual" | "professional" | "technical">("casual");
  const [conversationHistory, setConversationHistory] = useState<any[]>([]);

  // Share chat configuration
  useCopilotReadable({
    description: "Current chat mode and conversation preferences",
    value: { mode: chatMode, historyLength: conversationHistory.length },
  });

  // Action to change chat mode
  useCopilotAction({
    name: "setChatMode",
    description: "Change the conversation style and tone",
    parameters: [
      {
        name: "mode",
        type: "string",
        description: "Conversation mode to use",
        enum: ["casual", "professional", "technical"],
        required: true,
      },
    ],
    handler: async ({ mode }) => {
      setChatMode(mode);
      return {
        success: true,
        mode,
        description: mode === "casual" ? "Friendly and conversational" :
                    mode === "professional" ? "Formal business communication" :
                    "Technical and detailed explanations"
      };
    },
  });

  // Action to get conversation summary
  useCopilotAction({
    name: "summarizeConversation",
    description: "Provide a summary of our conversation so far",
    parameters: [],
    handler: async () => {
      const summary = {
        totalMessages: conversationHistory.length,
        currentMode: chatMode,
        topics: ["chat customization", "AI assistance", "conversation modes"],
        keyPoints: [
          "Multiple chat modes available",
          "Conversation history tracking",
          "Customizable AI assistance"
        ]
      };

      return summary;
    },
  });

  const getModeConfig = () => {
    switch (chatMode) {
      case "professional":
        return {
          placeholder: "How can I assist you professionally?",
          welcomeMessage: "I'm here to help with your professional needs.",
          suggestions: [
            "Prepare a business proposal",
            "Analyze market trends",
            "Draft professional correspondence"
          ]
        };
      case "technical":
        return {
          placeholder: "What technical problem can I help solve?",
          welcomeMessage: "Ready to dive deep into technical challenges.",
          suggestions: [
            "Debug this error message",
            "Explain this algorithm",
            "Review this code architecture"
          ]
        };
      default: // casual
        return {
          placeholder: "What's on your mind?",
          welcomeMessage: "Hey there! I'm here to chat and help out.",
          suggestions: [
            "Tell me about your project",
            "What's something you're curious about?",
            "Let's brainstorm some ideas"
          ]
        };
    }
  };

  const modeConfig = getModeConfig();

  return (
    <div className="min-h-screen bg-gradient-to-br from-blue-50 to-indigo-100">
      <div className="container mx-auto px-4 py-8">
        <div className="max-w-4xl mx-auto">
          {/* Header */}
          <div className="text-center mb-8">
            <h1 className="text-4xl font-bold text-gray-900 mb-4">
              Advanced AI Chat Assistant
            </h1>
            <div className="flex justify-center gap-4 mb-4">
              {["casual", "professional", "technical"].map(mode => (
                <button
                  key={mode}
                  onClick={() => setChatMode(mode as any)}
                  className={`px-4 py-2 rounded-lg font-medium transition-colors ${
                    chatMode === mode
                      ? "bg-indigo-600 text-white"
                      : "bg-white text-gray-700 hover:bg-gray-50"
                  }`}
                >
                  {mode.charAt(0).toUpperCase() + mode.slice(1)}
                </button>
              ))}
            </div>
            <p className="text-lg text-gray-600">
              {modeConfig.welcomeMessage}
            </p>
          </div>

          {/* Chat Interface */}
          <div className="bg-white rounded-2xl shadow-xl overflow-hidden">
            <div className="h-96">
              <CopilotChat
                className="h-full"
                placeholder={modeConfig.placeholder}
                showSuggestions={true}
                suggestions={modeConfig.suggestions}
                onMessage={(message) => {
                  setConversationHistory(prev => [...prev, {
                    role: "user",
                    content: message,
                    timestamp: new Date(),
                    mode: chatMode
                  }]);
                }}
              />
            </div>
          </div>

          {/* Status and Controls */}
          <div className="mt-6 grid grid-cols-1 md:grid-cols-3 gap-4">
            <div className="bg-white p-4 rounded-lg shadow">
              <h3 className="font-semibold text-gray-900 mb-2">Current Mode</h3>
              <p className="text-indigo-600 font-medium capitalize">{chatMode}</p>
            </div>

            <div className="bg-white p-4 rounded-lg shadow">
              <h3 className="font-semibold text-gray-900 mb-2">Conversation</h3>
              <p className="text-gray-600">{conversationHistory.length} messages</p>
            </div>

            <div className="bg-white p-4 rounded-lg shadow">
              <h3 className="font-semibold text-gray-900 mb-2">AI Status</h3>
              <p className="text-green-600">Online & Ready</p>
            </div>
          </div>

          {/* Help Section */}
          <div className="mt-8 bg-white p-6 rounded-lg shadow">
            <h2 className="text-xl font-semibold mb-4">Try These Commands:</h2>
            <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
              <div>
                <h3 className="font-medium text-gray-900 mb-2">Mode Switching:</h3>
                <ul className="text-sm text-gray-600 space-y-1">
                  <li>• "Switch to professional mode"</li>
                  <li>• "Use technical mode for coding questions"</li>
                  <li>• "Change to casual conversation"</li>
                </ul>
              </div>

              <div>
                <h3 className="font-medium text-gray-900 mb-2">Conversation:</h3>
                <ul className="text-sm text-gray-600 space-y-1">
                  <li>• "Summarize our conversation"</li>
                  <li>• "What mode are we in?"</li>
                  <li>• "Tell me about your capabilities"</li>
                </ul>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}

Custom Chat Components

Building Custom Chat UI

// app/components/CustomChatUI.tsx
"use client";

import { useCopilotChat } from "@copilotkit/react-core";
import { useState, useRef, useEffect } from "react";

export function CustomChatUI() {
  const [messages, setMessages] = useState<any[]>([]);
  const [inputValue, setInputValue] = useState("");
  const [isLoading, setIsLoading] = useState(false);
  const messagesEndRef = useRef<HTMLDivElement>(null);

  const { sendMessage, isLoading: chatLoading } = useCopilotChat();

  // Auto-scroll to bottom
  useEffect(() => {
    messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
  }, [messages]);

  const handleSendMessage = async () => {
    if (!inputValue.trim() || isLoading) return;

    const userMessage = inputValue.trim();
    setInputValue("");
    setIsLoading(true);

    // Add user message
    setMessages(prev => [...prev, {
      role: "user",
      content: userMessage,
      timestamp: new Date()
    }]);

    try {
      // Send to CopilotKit
      const response = await sendMessage(userMessage);

      // Add AI response
      setMessages(prev => [...prev, {
        role: "assistant",
        content: response,
        timestamp: new Date()
      }]);
    } catch (error) {
      // Add error message
      setMessages(prev => [...prev, {
        role: "assistant",
        content: "Sorry, I encountered an error. Please try again.",
        timestamp: new Date(),
        isError: true
      }]);
    } finally {
      setIsLoading(false);
    }
  };

  const handleKeyPress = (e: React.KeyboardEvent) => {
    if (e.key === "Enter" && !e.shiftKey) {
      e.preventDefault();
      handleSendMessage();
    }
  };

  return (
    <div className="flex flex-col h-screen bg-gray-50">
      {/* Header */}
      <div className="bg-white border-b px-6 py-4">
        <h1 className="text-xl font-semibold text-gray-900">Custom AI Chat</h1>
        <p className="text-sm text-gray-600">Powered by CopilotKit</p>
      </div>

      {/* Messages */}
      <div className="flex-1 overflow-y-auto px-6 py-4 space-y-4">
        {messages.length === 0 ? (
          <div className="text-center text-gray-500 mt-20">
            <div className="text-6xl mb-4">💬</div>
            <h3 className="text-lg font-medium mb-2">Start a conversation</h3>
            <p>Type a message below to begin chatting with AI.</p>
          </div>
        ) : (
          messages.map((message, index) => (
            <div
              key={index}
              className={`flex ${message.role === "user" ? "justify-end" : "justify-start"}`}
            >
              <div
                className={`max-w-xs lg:max-w-md px-4 py-2 rounded-lg ${
                  message.role === "user"
                    ? "bg-blue-500 text-white"
                    : message.isError
                    ? "bg-red-100 text-red-900"
                    : "bg-white text-gray-900 border"
                }`}
              >
                <p className="text-sm">{message.content}</p>
                <p className="text-xs opacity-70 mt-1">
                  {message.timestamp.toLocaleTimeString()}
                </p>
              </div>
            </div>
          ))
        )}

        {isLoading && (
          <div className="flex justify-start">
            <div className="bg-white border px-4 py-2 rounded-lg">
              <div className="flex items-center space-x-2">
                <div className="flex space-x-1">
                  <div className="w-2 h-2 bg-gray-400 rounded-full animate-bounce"></div>
                  <div className="w-2 h-2 bg-gray-400 rounded-full animate-bounce" style={{animationDelay: "0.1s"}}></div>
                  <div className="w-2 h-2 bg-gray-400 rounded-full animate-bounce" style={{animationDelay: "0.2s"}}></div>
                </div>
                <span className="text-sm text-gray-600">AI is thinking...</span>
              </div>
            </div>
          </div>
        )}

        <div ref={messagesEndRef} />
      </div>

      {/* Input */}
      <div className="bg-white border-t px-6 py-4">
        <div className="flex space-x-4">
          <div className="flex-1">
            <textarea
              value={inputValue}
              onChange={(e) => setInputValue(e.target.value)}
              onKeyPress={handleKeyPress}
              placeholder="Type your message..."
              className="w-full px-4 py-2 border rounded-lg resize-none focus:outline-none focus:ring-2 focus:ring-blue-500"
              rows={1}
              disabled={isLoading}
            />
          </div>
          <button
            onClick={handleSendMessage}
            disabled={!inputValue.trim() || isLoading}
            className="px-6 py-2 bg-blue-500 text-white rounded-lg hover:bg-blue-600 disabled:bg-gray-300 disabled:cursor-not-allowed"
          >
            {isLoading ? "Sending..." : "Send"}
          </button>
        </div>

        <div className="mt-2 text-xs text-gray-500 text-center">
          Press Enter to send, Shift+Enter for new line
        </div>
      </div>
    </div>
  );
}

Summary

In this chapter, we've covered:

CopilotSidebar: Sliding panel chat interface with customization options
CopilotChat: Inline chat components for embedded conversations
Advanced Customization: Themes, custom triggers, and state management
Custom Chat UI: Building completely custom chat interfaces
Integration Patterns: Embedding chat in various application contexts

Key Takeaways

Component Flexibility: Choose between sidebar and inline chat components
Full Customization: Control themes, behavior, and integration points
Context Awareness: Chat components work with your app's state and actions
User Experience: Customizable placeholders, suggestions, and welcome messages
Responsive Design: Components adapt to different screen sizes and contexts
Accessibility: Built-in keyboard navigation and screen reader support

Next Steps

Now that you can build chat interfaces, let's explore Generative UI - AI-generated React components.

Ready for Chapter 5? Generative UI

Generated for Awesome Code Docs

What Problem Does This Solve?

Most teams struggle here because the hard part is not writing more code, but deciding clear boundaries for className, text, gray so behavior stays predictable as complexity grows.

In practical terms, this chapter helps you avoid three common failures:

coupling core logic too tightly to one implementation path
missing the handoff boundaries between setup, execution, and validation
shipping changes without clear rollback or observability strategy

After working through this chapter, you should be able to reason about Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar as an operating subsystem inside CopilotKit Tutorial: Building AI Copilots for React Applications, with explicit contracts for inputs, state transitions, and outputs.

Use the implementation notes around rounded, font, theme as your checklist when adapting these patterns to your own repository.

How it Works Under the Hood

Under the hood, Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar usually follows a repeatable control path:

Context bootstrap: initialize runtime config and prerequisites for className.
Input normalization: shape incoming data so text receives stable contracts.
Core execution: run the main logic branch and propagate intermediate state through gray.
Policy and safety checks: enforce limits, auth scopes, and failure boundaries.
Output composition: return canonical result payloads for downstream consumers.
Operational telemetry: emit logs/metrics needed for debugging and performance tuning.

When debugging, walk this sequence in order and confirm each stage has explicit success/failure conditions.

Source Walkthrough

Use the following upstream sources to verify implementation details while reading this chapter:

View Repo Why it matters: authoritative reference on View Repo (github.com).
Awesome Code Docs Why it matters: authoritative reference on Awesome Code Docs (github.com).

Suggested trace strategy:

search upstream code for className and text to map concrete implementation paths
compare docs claims against actual runtime/config code before reusing patterns in production

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Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar

Overview

CopilotSidebar Component

Basic Sidebar Implementation

Sidebar Customization

CopilotChat Component

Inline Chat Implementation

Advanced Chat Customization

Custom Chat Components

Building Custom Chat UI

Summary

Key Takeaways

Next Steps

What Problem Does This Solve?

How it Works Under the Hood

Source Walkthrough

Chapter Connections

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Chapter 4: Chat Components - Building Chat Interfaces with CopilotChat and CopilotSidebar

Overview

CopilotSidebar Component

Basic Sidebar Implementation

Sidebar Customization

CopilotChat Component

Inline Chat Implementation

Advanced Chat Customization

Custom Chat Components

Building Custom Chat UI

Summary

Key Takeaways

Next Steps

What Problem Does This Solve?

How it Works Under the Hood

Source Walkthrough

Chapter Connections