/**
 * @fileoverview defineCheck - Unified check definition API
 *
 * The main API for creating fitness checks. Supports three modes:
 * - analyze: Per-file analysis with content and path
 * - analyzeAll: Multi-file analysis with lazy loading FileAccessor
 * - command: External tool execution with output parsing
 *
 * Check authors return CheckViolation[]. The framework converts each
 * CheckViolation into a universal Signal via createSignal().
 */
import type { UnifiedCheckConfig } from './check-config.js';
import type { Check } from './check-types.js';
/**
 * Define a fitness check using the unified API.
 *
 * @example
 * ```typescript
 * export const noConsoleLog = defineCheck({
 *   id: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
 *   slug: 'no-console-log',
 *   category: 'quality',
 *   description: 'Disallow console.log in production code',
 *   analyze: (content, filePath) => {
 *     const violations: CheckViolation[] = [];
 *     content.split('\n').forEach((line, idx) => {
 *       if (line.includes('console.log')) {
 *         violations.push({ line: idx + 1, message: 'No console.log', severity: 'error' });
 *       }
 *     });
 *     return violations;
 *   },
 * });
 * ```
 * @throws {ValidationError} When the check config is invalid
 */
export declare function defineCheck(config: UnifiedCheckConfig): Check;
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