151 lines
3.8 KiB
Plaintext
151 lines
3.8 KiB
Plaintext
---
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title: useCopilotKit
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description: "useCopilotKit Hook API Reference"
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---
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`useCopilotKit` is a React hook that provides access to the CopilotKit context, including the core instance, tool
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rendering capabilities, and runtime connection status. It's the primary way to interact with CopilotKit's core
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functionality from React components.
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## What is useCopilotKit?
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The useCopilotKit hook:
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- Provides access to the `CopilotKitCore` instance for agent and tool management
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- Exposes render tool calls for visual tool execution feedback
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- Subscribes to runtime connection status changes
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- Enables programmatic control over agents, tools, and context
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## Basic Usage
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```tsx
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import { useCopilotKit } from "@copilotkit/react-core";
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function MyComponent() {
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const { copilotkit } = useCopilotKit();
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// Access runtime status
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console.log("Runtime status:", copilotkit.runtimeConnectionStatus);
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// Get an agent
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const agent = copilotkit.getAgent("assistant");
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return (
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<div>Connected: {copilotkit.runtimeConnectionStatus === "Connected"}</div>
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);
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}
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```
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## Return Value
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The hook returns a `CopilotKitContextValue` object with the following properties:
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### copilotkit
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`CopilotKitCore`
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The core CopilotKit instance that manages agents, tools, context, and runtime connections. This is the main interface
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for interacting with CopilotKit programmatically.
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### renderToolCalls
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`ReactToolCallRenderer<any>[]`
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An array of tool call render configurations defined at the provider level. These are used to render visual feedback when
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tools are executed.
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### currentRenderToolCalls
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`ReactToolCallRenderer<unknown>[]`
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The current list of render tool calls, including both static configurations and dynamically registered ones.
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### setCurrentRenderToolCalls
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`React.Dispatch<React.SetStateAction<ReactToolCallRenderer<unknown>[]>>`
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A setter function to update the current render tool calls. Useful for dynamically adding or removing tool renderers.
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## Examples
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### Running an Agent
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```tsx
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import { useCopilotKit } from "@copilotkit/react-core";
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import { useAgent } from "@copilotkit/react-core";
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function AgentRunner() {
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const { copilotkit } = useCopilotKit();
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const { agent } = useAgent({ agentId: "assistant" });
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const [message, setMessage] = useState("");
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const handleSubmit = async () => {
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if (!message) return;
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// Add user message
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agent.addMessage({
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id: crypto.randomUUID(),
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role: "user",
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content: message,
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});
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// Run the agent
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await copilotkit.runAgent({ agent, agentId: "assistant" });
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setMessage("");
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};
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return (
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<div>
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<input
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value={message}
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onChange={(e) => setMessage(e.target.value)}
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placeholder="Type a message..."
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/>
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<button onClick={handleSubmit}>Send</button>
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</div>
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);
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}
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```
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### Monitoring Runtime Connection
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```tsx
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import { useCopilotKit } from "@copilotkit/react-core";
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function ConnectionStatus() {
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const { copilotkit } = useCopilotKit();
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const getStatusColor = () => {
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switch (copilotkit.runtimeConnectionStatus) {
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case "Connected":
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return "green";
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case "Connecting":
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return "yellow";
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case "Error":
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return "red";
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default:
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return "gray";
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}
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};
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return (
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<div className="connection-status">
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<div className={`indicator ${getStatusColor()}`} />
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<span>Runtime: {copilotkit.runtimeConnectionStatus}</span>
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{copilotkit.runtimeVersion && <span>v{copilotkit.runtimeVersion}</span>}
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</div>
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);
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}
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```
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## Automatic Re-renders
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The hook automatically subscribes to runtime connection status changes and triggers re-renders when:
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- The runtime connects or disconnects
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- The connection status changes
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- Connection errors occur
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This ensures your components always display the current connection state without manual subscriptions.
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