import type { GatewayToolExecutionContext } from '../types.js';
type RandomBytes = (size: number) => Buffer;
export type RunContextRegistryErrorCode = 'RUN_CONTEXT_KEY_INVALID' | 'RUN_CONTEXT_LEASE_CONFLICT' | 'RUN_CONTEXT_LEASE_EXPIRED';
export declare class RunContextRegistryError extends Error {
    readonly code: RunContextRegistryErrorCode;
    constructor(code: RunContextRegistryErrorCode, message: string);
}
export declare function createProcessContextKey(randomBytes?: RandomBytes): string;
export declare function isProcessContextKey(value: unknown): value is string;
export interface AcquiredRunContext {
    context: GatewayToolExecutionContext;
    releasePin: () => void;
}
export interface RunContextRegistryOptions {
    now?: () => number;
    hardCapMs?: number;
    createLeaseId?: () => string;
}
export declare class RunContextRegistry {
    private readonly entries;
    private readonly now;
    private readonly hardCapMs;
    private readonly createLeaseId;
    constructor(options?: RunContextRegistryOptions);
    register(contextKey: string, context: GatewayToolExecutionContext): string;
    acquire(contextKey: string): AcquiredRunContext | null;
    close(contextKey: string, leaseId: string): boolean;
    has(contextKey: string): boolean;
    private assertContextKey;
    private isExpired;
    private beginClosing;
    private removeIfCurrent;
}
export declare const runContextRegistry: RunContextRegistry;
export {};
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