/**
 * [WHO]: BuiltinExtension, getBuiltinExtensionPaths(), builtInExtensions
 * [FROM]: Depends on node:fs, node:path, config
 * [TO]: Consumed by main.ts, test files
 * [HERE]: builtin-extensions.ts - built-in extension registry for Catui
 */
export type BuiltinExtensionRiskLevel = "passive" | "command" | "tool" | "background" | "write-capable";
export type BuiltinExtensionTestContract = "lifecycle" | "external-process" | "resource-discovery" | "write-guard";
export interface BuiltinExtension {
    id: string;
    category: "default" | "optional" | "package";
    defaultEnabled: boolean;
    riskLevel: BuiltinExtensionRiskLevel;
    requiresUI: boolean;
    startsTimers: boolean;
    writesWorkspace: boolean;
    externalProcess: boolean;
    resourceDiscovery?: boolean;
    testContracts?: readonly BuiltinExtensionTestContract[];
    testFiles?: readonly string[];
}
export declare const builtInExtensions: readonly BuiltinExtension[];
/**
 * Get the list of built-in extension paths that Catui loads by default
 *
 * Returns all default-enabled extension paths (builtin/):
 * - NanoMem (persistent memory)
 * - Soul (AI personality evolution)
 * - LinkWorld (internet search)
 * - SecurityAudit (security audit)
 * - MCP (MCP protocol adapter)
 *
 * Optional extensions need to be enabled via configuration or --extension:
 * - Simplify (code simplification) - extensions/optional/simplify/
 * - export-html (HTML export) - extensions/optional/export-html/
 * - Browser harness (CDP automation) - extensions/builtin/browser/ (opt-in since P6/EV03; source stays
 *   under builtin/ until the Q2 physical/package opt-in decision moves it to extensions/optional/ or a package)
 */
export declare function getBuiltinExtensionPaths(): string[];
/**
 * @deprecated Use getBuiltinExtensionPaths() instead
 */
export declare function getNanopencilDefaultExtensionPaths(): string[];
/**
 * @deprecated Use getBuiltinExtensionPaths() instead
 */
export declare function getCatuiDefaultExtensionPaths(): string[];