/**
 * Live-agent registry — which sessions are running RIGHT NOW, and where.
 *
 * Session JSONL on disk can't distinguish a live session from a dead one;
 * this registry can: one small JSON per session under ~/.blockrun/agents/,
 * refreshed on every state change, with pid-based reconciliation (the same
 * liveness model as the task subsystem). The panel's Agents tab reads it
 * to render the fleet; serve's AgentHost and the CLI loop both write it.
 */
import type { AgentRunState } from '../events/types.js';
export interface LiveAgentRecord {
    sessionId: string;
    pid: number;
    state: AgentRunState;
    label: string;
    model: string;
    /** Which process type hosts the loop — panel can only drive 'serve' agents. */
    host: 'serve' | 'cli';
    startedAt: number;
    updatedAt: number;
    /** Count of approvals parked waiting for a human. */
    pendingApprovals?: number;
}
export declare function liveAgentsDir(): string;
export declare function writeLiveAgent(record: LiveAgentRecord): void;
export declare function removeLiveAgent(sessionId: string): void;
/**
 * All records, with dead-pid reconciliation: a record whose process is gone
 * flips to 'failed' if it claimed to be running (crash without cleanup), and
 * terminal records older than a day are pruned.
 */
export declare function readLiveAgents(): LiveAgentRecord[];