/**
 * Daemon composition root: the real ACP runner + the HTTP daemon + discovery file +
 * lifecycle. Invoked as `--daemon-run` by the shim's detached spawn, or in the foreground
 * via `daemon run`. All diagnostics go to stderr (the detached spawn redirects it to
 * daemon.log).
 */
export interface RunDaemonOptions {
    port?: number;
    /**
     * Replace a stale daemon that still holds the family's discovery pointer. The predecessor is
     * deliberately left running to finish its in-flight work, so a successor never fights for
     * the port — it binds the explicitly requested port if one was given (falling back to an
     * ephemeral one when that is taken), otherwise an ephemeral one, and repoints the pointer at
     * itself, demoting the predecessor to a lame duck (whose pid no longer matches the pointer).
     * Set by the shim (`--supersede`) when the live daemon is older than the shim.
     */
    supersede?: boolean;
}
export declare function resolveDaemonPort(explicit?: number): number;
export declare function runDaemon(options?: RunDaemonOptions): Promise<"started" | "already-running">;
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