import type { ProjectIndexServerMetadata } from './project-server-protocol.js';
export declare function removeMetadataIfOwned(metadataPath: string, pid: number): void;
export declare function writeProjectServerMetadata(metadataPath: string, metadata: ProjectIndexServerMetadata): Promise<void>;
/**
 * One SIGINT/SIGTERM pair per PROCESS, not per module instance.
 *
 * The in-process test harness imports this module once per test case with a
 * `?case=<n>` query URL, so every case evaluates this module body fresh; a
 * bare top-level `process.once(signal, ...)` pair accumulates one handler
 * per case until Node raises MaxListenersExceededWarning in every coverage
 * run. The guard lives on globalThis under a Symbol.for key: the first
 * evaluation registers the pair, every evaluation re-targets it at its own
 * `stop`, and a fired signal removes the pair (once semantics).
 */
export interface CodebaseIndexSignalGuard {
    arm(stop: (signal: string) => Promise<void>): void;
}
export declare const SIGNAL_GUARD: unique symbol;
export declare function armCodebaseIndexSignalGuard(stop: (signal: string) => Promise<void>): void;
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