dsh-notebook-v2: Run a full Jupyter notebook in the DSH right column

dsh-notebook-v2 is a client plugin for DeepSeek Harness maintained by LearnItHard, featuring a custom-built Jupyter panel in the right sidebar. It supports a persistent kernel, SSE streaming output, CodeMirror 6 editing, four cell types (code / markdown / shell / raw), multi-tab support, lossless read/write of .ipynb files with semantic equivalence, and built-in AI completion and inline rewriting (Mod-K line-level diff). The article details the official script installation command, profile specification, dry-run and uninstallation methods, kernel selection order, the /nb2/diagnostics diagnostic interface, shortcuts, and conflict resolution for tool names (nb_*) with the third-party plugin @beihaizb/dsh-notebook. It is intended for users performing exploration and plotting within DSH, while advising users to run with current process permissions and to check the dry-run and source code license before installation.