dsh-markstream

The default streaming Markdown renderer in DeepSeek Harness tends to produce visible flicker and layout shifts during AI conversations, especially when code blocks stream in incrementally or when math and diagrams are involved. dsh-markstream replaces the built-in assistant-step renderer with markstream-react, delivering low-jitter incremental streaming where every intermediate Markdown frame transitions smoothly instead of snapping into place.

Core capabilities span the most common AI-chat content types: stream-diffs incremental code blocks with syntax highlighting, diff views, line numbers, and collapse; Mermaid diagrams; KaTeX math; and safe inline HTML. The original Think disclosure row, image attachment gallery, unknown-block JSON fallback, and stopped marker all behave identically to the shipped renderer, so no existing UI semantics are lost. A floating config panel (gear icon at the bottom-right) lets you adjust theme, typewriter cursor, code-block styling, diagram max-height, and a dozen-plus other parameters in real time; changes take effect immediately and persist to settings.yaml.

This plugin is a good fit for users who run long conversations in DSH Web and frequently review streaming code, formulas, or diagrams. If you want Markdown to appear word by word like a typewriter rather than refreshing in whole chunks, or you want code blocks to show diffs and syntax highlighting while they are still streaming, dsh-markstream lifts the reading experience out of the box. No product code changes are needed — install through the standard plugin channel and it is ready to go.