import type { ChildProcess } from 'node:child_process';
import type { CgroupOomSnapshot } from './oxigraph-memory.js';
export interface OxigraphMemoryLimits {
    highMiB?: number;
    maxMiB: number;
}
export interface OxigraphSpawnSpec {
    command: string;
    args: string[];
    environment?: NodeJS.ProcessEnv;
}
export type ListenOwnerResolver = (child: ChildProcess, port: number, host: string, ownership?: 'child-only' | 'process-tree') => Promise<number | null>;
export interface OxigraphLaunchStrategy {
    readonly mode: 'direct' | 'systemd-scope';
    nextSpawnSpec(binaryPath: string, binaryArgs: string[]): OxigraphSpawnSpec;
    resolveListenerPid(child: ChildProcess, port: number, host: string, resolver: ListenOwnerResolver): Promise<number | null>;
    observeStderr(child: ChildProcess, text: string): void;
    classifyOomExit(input: {
        child: ChildProcess;
        code: number | null;
        signal: NodeJS.Signals | null;
        snapshot?: CgroupOomSnapshot;
        readOomKill: (dir: string) => number | null;
    }): boolean;
    logSummary(): string | null;
}
export declare function normalizeOxigraphMemoryLimits(input: {
    highMiB?: unknown;
    maxMiB?: unknown;
}): OxigraphMemoryLimits | undefined;
export declare function createOxigraphLaunchStrategy(opts: {
    memoryLimits?: OxigraphMemoryLimits;
    platform: NodeJS.Platform;
    parentPid: number;
    uid: number;
    nodeExecutable?: string;
    watchdogPath?: string;
}): OxigraphLaunchStrategy;
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