/**
 *
 * Writes a JSON snapshot of the current session's state to
 * `_runtime/<sessionId>/checkpoints/<iso>.json`. Designed for skill
 * invocation; the CLI is the muscle, the LLM decides the cadence.
 */
import type { Command } from 'commander';
import { type ProgramIO } from '../cli-helpers.js';
export declare function registerSessionCheckpointCommand(session: Command, _io: ProgramIO): void;