/**
 * [WHO]: Simplify extension - Claude Code style code simplification tool
 * [FROM]: Depends on @catui/ai, @catui/tui, child_process, fs, path, core/extensions-host/types, modes/interactive/components/dynamic-border, modes/interactive/theme/theme
 * [TO]: Consumed by builtin-extensions.ts as optional extension
 * [HERE]: extensions/optional/simplify/index.ts - code simplification for Catui
 *
 * Features:
 * 1. Perception layer: Scan Git Diff + read project rules + analyze code
 * 2. Decision layer: Apply refactoring patterns (guard clauses, expression folding, redundancy removal)
 * 3. Execution layer: Generate Diff and apply to files
 * 4. Validation layer: Run tests to verify, rollback on failure
 */
import type { ExtensionAPI } from "../../../core/extensions-host/types.js";
declare function getGitDiff(cwd: string): string;
declare function getFileDiff(cwd: string, file: string): string;
declare function resolveWorkspaceFile(cwd: string, filePath: string): string | undefined;
interface TestCommand {
    command: string;
    args: string[];
    label: string;
}
declare function detectTestCommand(cwd: string): TestCommand | null;
declare function runTests(cwd: string): {
    success: boolean;
    output: string;
};
export default function simplifyExtension(api: ExtensionAPI): void;
export declare const __testUtils: {
    getGitDiff: typeof getGitDiff;
    getFileDiff: typeof getFileDiff;
    resolveWorkspaceFile: typeof resolveWorkspaceFile;
    detectTestCommand: typeof detectTestCommand;
    runTests: typeof runTests;
};
export {};