/**
 * Evaluator execution engine (FR-23).
 *
 * Reads evaluator configs for a given stage, spawns each evaluator script
 * as a child process, passes standardized JSON via stdin, parses JSON from
 * stdout, and aggregates results.
 *
 * AC-23.1: Execute evaluators in registration order.
 * AC-23.2: stdin/stdout JSON protocol.
 * AC-23.3: Any fail → overall fail.
 * AC-23.4: Empty evaluator list → skip (pure LLM fallback).
 * AC-23.5: Timeout → error, not pass.
 * AC-23.7: Any executable format (shell, Node.js, Python, etc.).
 */
import type { EvaluatorConfig, EvaluatorInput, EvaluatorExecution, EvaluatorResultSet, EvaluatorRegistry } from './evaluator-types.js';
/**
 * Run a single evaluator script.
 *
 * The script receives JSON on stdin and must output JSON on stdout.
 * Exit code 0 = normal execution (verdict from output).
 * Non-zero exit code = evaluator error (not equivalent to fail).
 */
export declare function runSingleEvaluator(config: EvaluatorConfig, input: EvaluatorInput, evaluatorsDir: string): Promise<EvaluatorExecution>;
/**
 * Run all evaluators registered for a given stage.
 *
 * AC-23.1: Executes in registration order.
 * AC-23.3: Any fail → overall fail.
 * AC-23.4: Empty list → returns null (caller falls back to pure LLM).
 */
export declare function runEvaluators(stage: string, registry: EvaluatorRegistry, artifactPaths: string[], projectMeta: Record<string, unknown>, evaluatorsDir: string): Promise<EvaluatorResultSet | null>;
/**
 * Load evaluator registry from project config.
 *
 * Reads from sevo.config.json `evaluators` field, or returns empty registry.
 */
export declare function loadEvaluatorRegistry(projectRoot: string): EvaluatorRegistry;
/**
 * Get the evaluators directory path for a project.
 */
export declare function getEvaluatorsDir(projectRoot: string): string;
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