/** The hard, locked batch threshold enforced by the runtime gate. */
export declare const DEFAULT_SPAWN_THRESHOLD = 4;
/** The justification a large batch must supply to pass the hard gate. */
export interface SpawnPlanReceipt {
    whyParallel: string;
    whyNotLocal: string;
    independence: string;
    expectedReceiptShape: string;
    maxInlineTokens: number;
}
export interface SpawnGateRequest {
    /** Number of children the batch wants to spawn. */
    childCount: number;
    /** The spawn-plan receipt, when provided. */
    plan?: SpawnPlanReceipt;
}
export type SpawnGateOutcome = "allowed" | "rejected";
export interface SpawnGateDecision {
    outcome: SpawnGateOutcome;
    /** Human-readable reason, suitable for a blocked-result message. */
    reason: string;
    /** Whether a plan was required for this request. */
    planRequired: boolean;
    /** Missing plan field names when rejected for an incomplete plan. */
    missingFields: readonly string[];
}
export declare function findMissingPlanFields(plan: SpawnPlanReceipt | undefined): string[];
export declare function decide(childCount: number, threshold: number, plan: SpawnPlanReceipt | undefined): SpawnGateDecision;
export declare function evaluateSpawnGate(request: SpawnGateRequest): SpawnGateDecision;