dsh-markdown-preview

When using DeepSeek Harness Web, the default behavior of clicking a produced-file chip hands the file to the system's default application, such as opening code files with Xcode on macOS, which disrupts the workflow. The dsh-markdown-preview plugin addresses this by taking over the produced-files row and rendering file previews inline in the conversation, eliminating the need to switch applications or open new tabs.

The plugin offers comprehensive preview capabilities. Markdown files are rendered server-side with markdown-it, supporting GFM tables, fenced code blocks, and syntax highlighting via highlight.js; images including PNG, JPEG, GIF, WebP, and SVG are displayed inline; code files across 40+ extensions (e.g., .json, .js, .py) are presented in a dark editor-style view with full syntax highlighting; and other text files fall back to plain text. Additional features include a fullscreen viewer, theme-aware panels that follow DSH's light/dark modes, and security measures like file size caps and HTML escaping for safe, efficient previews.

This plugin is ideal for all DeepSeek Harness users, particularly developers, data scientists, and content creators who frequently handle generated code, documents, or images. By integrating previews directly into the chat interface, it enhances productivity, allowing users to stay focused on their tasks without constant context switching.