/**
 * Global instance registry — tracks all active context-mem instances.
 * Each serve process registers itself at startup, deregisters at shutdown.
 * Dashboard reads this to discover all projects.
 *
 * Storage: ~/.context-mem/instances/{hash}.json
 */
export interface InstanceInfo {
    projectDir: string;
    projectName: string;
    dbPath: string;
    pid: number;
    startedAt: string;
}
export declare function registerInstance(projectDir: string, dbPath: string): void;
export declare function deregisterInstance(projectDir: string): void;
/** Get all active instances, pruning stale ones */
export declare function getActiveInstances(): InstanceInfo[];
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