/**
 * Minimal validator for the StageSchema JSON-schema subset. Deliberately tiny:
 * a full JSON Schema implementation would pull a dependency (ajv) for
 * validation depth workflow gates don't need. Supported: type, oneOf,
 * properties, required, additionalProperties, items, minItems/maxItems,
 * minLength/maxLength, pattern, and enum.
 * Returns a list of human-readable problems (empty = valid) so the engine can
 * feed failures back into the retry prompt verbatim.
 */
import type { StageSchema } from "./types.js";
export declare function validateAgainstSchema(value: unknown, schema: StageSchema, path?: string): string[];
/**
 * Parse one schema-gated JSON value.
 *
 * Exact JSON and a whole fenced value remain the normal paths. Some adapters
 * prepend a short narration despite an explicit JSON-only contract. Accept
 * that drift only when the reply contains exactly one unambiguous top-level
 * object or array, the value reaches the end of the reply, and JSON.parse
 * accepts it. Trailing prose, multiple values, and malformed candidates remain
 * failures.
 */
export declare function parseStageOutput(text: string): {
    value?: unknown;
    error?: string;
};
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