import { z } from 'zod';
/** The registry filename for a daemon on `port` (sibling of daemon-<port>.pid /.log). */
export declare function daemonRegistryFileName(port: number): string;
/** Extract the port from a registry filename, or null when the name isn't a registry entry. */
export declare function daemonRegistryPort(fileName: string): number | null;
/** One daemon's registry entry: enough to match it to a project and prove it's still alive. */
export declare const DaemonRegistryEntrySchema: z.ZodObject<{
    port: z.ZodNumber;
    pid: z.ZodNumber;
    cwd: z.ZodString;
    projectId: z.ZodOptional<z.ZodString>;
    startedAt: z.ZodNumber;
}, "strip", z.ZodTypeAny, {
    port: number;
    pid: number;
    cwd: string;
    startedAt: number;
    projectId?: string | undefined;
}, {
    port: number;
    pid: number;
    cwd: string;
    startedAt: number;
    projectId?: string | undefined;
}>;
export type DaemonRegistryEntry = z.infer<typeof DaemonRegistryEntrySchema>;
/**
 * Pick the daemon port an app should connect to, given the registry entries, the app's projectId, and
 * a liveness probe. Pure so both the vite and next plugins share one rule and it's unit-testable:
 * 1. drop dead daemons (crashed, stale entry);
 * 2. among the living, prefer the one whose projectId matches the app's — lowest port wins on a tie;
 * 3. return null when nothing matches, so the caller falls back to the default port (never guesses a
 * mismatched daemon — a wrong auto-connect is worse than the honest default).
 */
export declare function pickDaemonPort(entries: readonly DaemonRegistryEntry[], projectId: string | undefined, isAlive: (pid: number) => boolean): number | null;