DSH 永久插件：LVAL 工程运行/代码查看/程序版本快照回退 + VTD 虚拟对话树（编辑/重试/分支、消息小版本）+ DET 管理器。A permanent DeepSeek Harness plugin: project run & code viewer, program snapshots, an in-session conversation tree (edit/retry/branches), message micro-versions and a feature manager.
DLT (DeepSeek Light Tool) - a permanent DeepSeek Harness (DSH) plugin: per-turn CNY cost, DeepSeek account balance, native PDF/Word/Excel/CSV read-write tools and right-sidebar previews, a hardcoded compiler/runtime registry with direct run/build tools, and a runtime master switch (DLT manager).
DBS (DSH BGM service) — 独立于 DET 的 DeepSeek Harness 音乐播放器插件：本地音乐库 + 浮动播放器 + AI 依任务控制播放。A standalone DSH BGM player plugin: local music library, floating player, AI-driven playback.
