TinyMCE-for-Deepseek-Harness: Visually Edit HTML in DSH Sidebar

A client plugin maintained by gustock that integrates TinyMCE 6 into DeepSeek Harness's Better Sidebar, enabling WYSIWYG editing of `.html`/`.htm` files in the sidebar. It saves data via `/sidebar/write` with mtime conflict detection, replacing only the `body` while byte-preserving `doctype`, `head`, `script`, and comments. It is compatible with DSH >= 0.2.1-rc.2, Better Sidebar >= 0.28.0, and Node >= 20. It bundles TinyMCE 6.8.6 (MIT) and makes no network requests at runtime. This article provides the official installation commands, steps to reproduce `sample.html`, the responsibilities of the Host and Client halves, applicable scenarios, and limitations such as body-only mode, relative paths, and tag normalization.