export declare const APPS_EXTENSION_KEY = "io.modelcontextprotocol/ui";
export declare const CLIENT_CREDENTIALS_EXTENSION_KEY = "io.modelcontextprotocol/oauth-client-credentials";
export declare const ENTERPRISE_MANAGED_AUTH_EXTENSION_KEY = "io.modelcontextprotocol/enterprise-managed-authorization";
export declare const SKILLS_EXTENSION_KEY = "io.modelcontextprotocol/skills";
export declare const TASKS_EXTENSION_KEY = "io.modelcontextprotocol/tasks";
export type ExtensionSupport = 'full' | 'none';
export interface McpExtension {
    id: string;
    label: string;
    support: ExtensionSupport;
    note: string;
    declaredByClient: boolean;
}
export declare const MCP_EXTENSIONS: readonly McpExtension[];
export declare function findMcpExtension(id: string): McpExtension | undefined;
export declare function clientExtensionDeclarations(): Record<string, Record<string, never>>;
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