CodeReader: View and edit workspace files in DSH Web

CodeReader is a plugin designed specifically for DeepSeek Harness (DSH) Web, maintained by PathChan and licensed under the MIT License. It aims to integrate a workspace file tree and a multi-tab editing canvas into the conversational interface, enabling users to browse, verify, edit, and write back files in the current workspace without switching windows. Key features include an expandable file tree, a multi-tab editor supporting syntax highlighting and line numbers, and the ability to save and validate content via keyboard shortcuts or the toolbar. The plugin supports agent collaboration by automatically switching to read-only mode when a model generates a file to prevent conflicts, and allows opening files with the system's default program. User preferences are stored locally in the browser and are not transmitted to the server. Installation requires configuring DSH Web first, followed by adding the plugin via the `npx` command from GitHub or local source code.