import { AihError } from "../errors.js";
/**
 * Plan-time feature-key validation — the W2 orchestrator ruling made concrete:
 * the declaration schema accepts `features` as an open `record<string, boolean>`,
 * and PER-ADAPTER key validation is the enforcement point. Every adapter calls
 * this from `plan` with its own known-key list, so an unknown feature key fails
 * closed before any work is scheduled instead of being silently ignored.
 */
/** A declared feature key no adapter recognizes. Fails closed at plan time. */
export declare class BindingFeatureKeyError extends AihError {
    constructor(message: string);
}
/**
 * Reject unknown `features` keys for a framework. An absent `features` object is
 * valid (no flags declared); an empty known-key list means the framework accepts
 * no feature flags at all, so any declared key is unknown.
 */
export declare function assertKnownFeatureKeys(declared: Record<string, boolean> | undefined, known: readonly string[], framework: string): void;