Ziwen Song is the cofounder of AirJelly, building context-aware proactive AI agents.https://ziwenlab.com/https://ziwenlab.com/posts/claude-code-context-compaction/https://ziwenlab.com/posts/claude-code-context-compaction/拆解 Claude Code 从 Snip、Microcompact、Context Collapse 到 Session Memory 和 Full Compact 的分层压缩管线，以及缓存编辑协议的证据边界。Sun, 26 Jul 2026 16:13:39 GMThttps://ziwenlab.com/posts/rag-retrieval/https://ziwenlab.com/posts/rag-retrieval/系统梳理 RAG 的文档切块、近似最近邻与混合召回、融合精排、上下文构建和分层评估，解释各阶段的职责、取舍与落地基线。Sun, 26 Jul 2026 07:46:07 GMThttps://ziwenlab.com/posts/dynamic-tool-loading/https://ziwenlab.com/posts/dynamic-tool-loading/对比 Kimi Code、Pi、Codex 与 Claude Code 的动态工具加载机制，解释 registry、active set、API 协议、执行路由与缓存之间的关系。Mon, 20 Jul 2026 04:00:00 GMThttps://ziwenlab.com/posts/pi-and-kimi-code-harness-architecture-analysis/https://ziwenlab.com/posts/pi-and-kimi-code-harness-architecture-analysis/对比 Pi 与 Kimi code 两套 Agent Harness 的架构设计：一个是控制流驱动、易于嵌入的状态机，一个是以 StepRequest 为核心、分作用域可恢复的调度内核。Sat, 18 Jul 2026 16:30:00 GMT