context-handoff

Write scoped context handoff packets so a future session, agent, or human can resume work without rereading the whole conversation. Use when the user asks to hand off, compact, summarize for the next agent/session, preserve context, create a resume packet, or says "上下文交接", "交接包", "下一棒", "新会话", "压缩上下文", "续上", or similar. Supports project, user, and session scope; does not write stable docs or execute downstream work.