dsh-plugin-custom-css

DeepSeek Harness ships with a fixed set of Web UI styles. Want a different font stack, tighter line-height, or a sidebar background that matches your palette, and the only route was digging through source CSS and hoping you did not break it during the next update. This plugin collapses that workflow into a single row in the Settings panel: flip the toggle on, paste or write CSS in the textarea, and every keystroke refreshes the live interface instantly, no page reload required.

It deliberately stays out of the way. The injected snippet is appended to the end of the style list, so styles from other sources are never removed. Switching the toggle off pauses injection without deleting your saved code. Persistence uses a local JSON file plus a localStorage mirror, so the snippet is applied before the first paint on the next launch, eliminating any flash of unstyled content. A practical bonus: the textarea can reference the Harness design tokens (--dsw-alias-, --dsw-font-), meaning your tweaks automatically follow the active light or dark variant and never produce a white-on-white mishap.

It is built for anyone who wants DSH Desktop to feel just a little more like theirs without touching the source: a new font stack, a slightly narrower sidebar, a brand-color accent on the primary button, a subtle inner shadow on the textarea. A few lines of CSS, saved once, applied everywhere.