dsh-file-explorer

File Explorer for DeepSeek Harness: a right-side, resizable file tree with Markdown rendering, syntax highlighting, in-panel editing, and one-click open in VS Code or the system file manager.

A community plugin for DeepSeek Harness (tagged dsh-plugin). This repository is a vendored, hardened fork. Upstream is joejojoking-cloud/dsh-file-explorer; this fork is frozen (no upstream updates) and adds security fixes, a fully English UI, and a panel background that matches the Harness theme. See FORK.md for the provenance and the complete patch list, and AUDIT.md for the security audit.

It is a global file explorer for DeepSeek Harness: every session gets a folder toggle in the header that opens a resizable file-tree panel on the right of the page.

Features

• Right-side panel (shell.overlay, toggleable). The file tree and the preview pane collapse independently: each has its own > handle on its left edge. Collapsing the tree keeps the preview and snaps it to the right edge; collapsing the preview keeps every tab, and reopening restores it. Drag the left edge to resize (260 to 900 px).
• Tabbed preview. Browser-style tabs, one per file, in open order. Clicking a background tab does not reorder, the strip scrolls when it overflows, switching does not reload, each tab closes with ×, and closing the last one hides the pane.
• Double-click the chat area collapses both panes and applies a project filter: tabs whose file lives inside the current project folder are kept (hidden) and restored when the tree reopens, while tabs from elsewhere are closed.
• Header: "Files" plus six icons: VS Code (open the whole workspace in VS Code), system file manager (open the current selection: a directory opens directly, a file is revealed and highlighted in its folder, nothing selected opens the project root), expand/collapse all, refresh, edit, and collapse the file tree (preview kept).
• Search box: recursively scans the workspace (skips .git and node_modules, capped at 300 matches).
• File tree: the root is expanded by default, directories expand and collapse on click (lazy), and a single or double click on a file opens it in the preview.
• Preview: .md files render Markdown (headings, lists, code blocks, quotes, links); fenced code blocks are highlighted by language, and other text files are highlighted by extension (JSON, YAML, JS, TS, Python, C, C++, Java, Go, Rust, Shell, SQL, TOML, INI, CSS, HTML, and more). The edit icon switches to an editable textarea and saving writes back to disk; clicking the previewed file again closes its tab.
• Files larger than 1 MB report that preview is not supported.

Install

dsh plugin --profile web add 

Restart the harness afterwards: every session then loads the plugin (host routes under /plugins/file-explorer/* plus the web client panel).

Layout

• src/index.ts - host half (built to lib/index.js): the fs service plus the webServer HTTP routes (list, search, read, write, open-vscode, open-folder).
• src/client/index.ts - web client half (tsc to lib/client/index.js, then tsdown to lib/client.js): registers the shell.overlay panel and the conversation.session.header.actions toggle.
• cordis.patch.yml - bundle patch that inserts the file-explorer row into the profile's host composition.

Development (important)

pnpm run build        # clean && tsc && tsc -p tsconfig.client.json && tsdown
node --check lib/client.js
pnpm test             # host half unit tests (node --test)

Never edit the artifacts under lib/ directly: they are generated from src/. Historically a hand edit put a backtick inside the CSS template literal, which terminated the template early, produced a SyntaxError in the whole bundle, and made startup report "loaded without registering"; the next build also overwrites hand edits. Put style and logic changes in src/.

Convention already in place: the right-hand padding concession on [data-phase=active] applies instantly (no transition / will-change). An animated chat column width competes with scroll anchoring while the transcript streams, which made messages jump, the bottom rise, or the column paint blank.

Notes specific to this fork

• The client bundle (lib/client.js) is hand-patched here, because the upstream client build toolchain cannot be installed standalone (its declared @deepseek-ai/dsh-client-* peers pull an unpublished @deepseek-ai/dsh-compact). Every client change is mirrored into src/client/index.ts, so a future build reproduces it.
• The host half is regenerated mechanically: tsc -p tsconfig.json reproduces lib/index.js byte for byte from src/index.ts (verified).
• Security fixes and the edit-button fix were also contributed upstream as PRs #7 and #8; the English UI and the theme-matched panel are intentionally fork-only.