export type BindingSource = 'canonical' | 'legacy';
/** One stale entry in the project-level binding. */
export type StaleInstance = {
    sid: string;
    callerId: string;
    lastHeartbeat: string;
};
export declare const STALE_TTL_MS = 300000;
export declare function listStaleInstances(projectRoot: string, ttlMs?: number): StaleInstance[];
/** The `staleBinding` block every doctor envelope carries. */
export declare function staleBindingSection(ttlMs: number, staleInstances: readonly StaleInstance[], droppedStale: readonly string[]): {
    ttlMs: number;
    staleCount: number;
    staleInstances: readonly StaleInstance[];
    droppedCount: number;
    droppedSids: readonly string[];
};