export declare function fdSoftLimit(): number;
export declare function deriveRequestBudget(cpus: number, fdLimit?: number): number;
export declare function requestBudget(explicit?: number): number;
export declare function packageConcurrency(depCount: number, budget: number, threads?: number): number;
export declare function fileThreadsPerPackage(packages: number, budget?: number): number;
export declare function copyConcurrency(budget: number): number;
export declare function isTransientNetworkError(err: unknown, depth?: number): boolean;
export type InstallScope = {
    threads: number;
    inFlight: Map<string, Promise<boolean>>;
    transientErrors: string[];
};
export declare function getInstallScope(): InstallScope | undefined;
export declare function createInstallScope(threads: number): InstallScope;
export declare function noteTransientNetworkError(err: unknown): void;
export declare const MAX_INSTALL_ATTEMPTS = 3;
export declare function nextRetryBudget(scope: InstallScope, thrown: unknown, attempt: number, budget: number): number | undefined;
export declare function runInInstallScope<T>(scope: InstallScope, fn: () => Promise<T>): Promise<T>;
export declare function installWithRetry(install: (threads: number) => Promise<boolean>): Promise<boolean>;
export declare function dedupeInstall(key: string, fn: () => Promise<boolean>): Promise<boolean>;