Write-Ahead Log protocol for agent state persistence. Prevents losing corrections, decisions, and context during conversation compaction. Use when: (1) receiving a user correction — log it before responding, (2) making an important decision or analysis — log it before continuing, (3) pre-compaction memory flush — flush the working buffer to WAL, (4) session start — replay unapplied WAL entries to restore lost context, (5) any time you want to ensure something survives compaction.

用于代理状态持久化的预写日志协议，防止在对话压缩过程中丢失修正、决策和上下文。适用场景：（1）收到用户修正时——在响应前记录日志；（2）做出重要决策或分析时——在继续前记录日志；（3）压缩前内存刷新时——将工作缓冲区刷新至预写日志；（4）会话启动时——重放未应用的预写日志条目以恢复丢失的上下文；（5）任何需要确保内容能抵御压缩的情况。