/**
 * cli-checkpoint.ts
 *
 * Automatic checkpoint: reads recent exchanges from the active O-entry,
 * then spawns a Haiku subagent WITH MCP tool access that writes L/D/E entries
 * and updates the project handoff. The subagent follows the hmem-write skill rules.
 *
 * Designed to run in the background (spawned by the Stop hook when checkpointMode is "auto").
 *
 * Usage: hmem checkpoint
 *
 * Requires env:
 *   HMEM_PATH        — path to .hmem file (auto-detected)
 *   HMEM_PROJECT_DIR — directory for config + company.hmem
 */
export declare function checkpoint(): Promise<void>;