export type CrashKind = 'uncaught-exception' | 'unhandled-rejection';
/**
 * Synchronously record a crash to fd 2 and to
 * `~/.cache/obsidian-brain/last-startup-error.log`.
 *
 * Both writes are blocking syscalls so the bytes land before the caller
 * issues `process.exit(1)`. Both swallow their own errors via try/catch
 * because the calling context is already a fatal-error path — we don't
 * want a teardown-time write failure to mask the original crash.
 *
 * Exported so tests can verify the file/banner shape without having to
 * trigger a real `process.on('uncaughtException')` event (which would
 * otherwise need a forked-process harness).
 */
export declare function recordCrash(kind: CrashKind, err: unknown): void;
/**
 * Named handler for `uncaughtException`. Exported for tests; the
 * registration call below installs this same function on `process`.
 */
export declare function onUncaughtException(err: Error): void;
/**
 * Named handler for `unhandledRejection`. Exported for tests; the
 * registration call below installs this same function on `process`.
 */
export declare function onUnhandledRejection(reason: unknown): void;