/**
 * Drive mode keep-warm (specs/2026-10-09-drive-mode-v3.md §5): while the
 * owner is in a Drive mode session, the agents he names and the team leads
 * he talks to stay running, so the next thing he says to them is answered in
 * seconds instead of after a cold start.
 *
 * Crewly Cloud tells this machine which of its agents to keep warm (relay
 * push `op:'warm'`, the list read back from `machine/state` with this
 * machine's token) and repeats it every few minutes while the phone is
 * connected. Each list holds until its `until` time (or the session's end),
 * so a phone that drops never pins agents for long.
 *
 * Consulted by every path that stops an idle agent or frees a running slot
 * (idle stop, memory-pressure stop, slot freeing, reconciler wake eviction)
 * and by the start gate, which lets a warm agent's start go ahead of
 * ordinary starts.
 *
 * @module services/drive/drive-keep-warm
 */
/** Which agents Drive mode keeps running right now. */
export declare class DriveKeepWarm {
    private readonly now;
    private readonly sessions;
    /**
     * @param now - Clock (ms)
     */
    constructor(now?: () => number);
    /**
     * Replace a session's warm list.
     *
     * @param driveSessionId - Drive mode session
     * @param agents - Agent sessions to keep warm
     * @param untilMs - Until when (ms)
     * @returns The agents that were not warm before (to pre-start)
     */
    set(driveSessionId: string, agents: readonly string[], untilMs: number): string[];
    /**
     * The session ended: its agents are no longer kept warm.
     *
     * @param driveSessionId - Drive mode session
     */
    end(driveSessionId: string): void;
    /**
     * Whether an agent is kept warm by any live session.
     *
     * @param agentSession - Agent session name
     * @returns True while a session's list holds it
     */
    isWarm(agentSession: string): boolean;
    /**
     * Every agent kept warm now (expired lists are dropped).
     *
     * @returns Agent sessions
     */
    warmAgents(): string[];
}
/** @returns The process-wide keep-warm registry */
export declare function getDriveKeepWarm(): DriveKeepWarm;
/**
 * Replace the registry (tests).
 *
 * @param registry - Registry
 */
export declare function setDriveKeepWarm(registry: DriveKeepWarm): void;
/**
 * Whether Drive mode keeps an agent running right now. Never throws.
 *
 * @param agentSession - Agent session name
 * @returns True while the owner's Drive mode session keeps it warm
 */
export declare function isDriveWarm(agentSession: string): boolean;
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