Plugins

Loopback-first multi-agent message relay: HMAC-authenticated broker plus dsh plugin (relay_send/recv/peers/history), zero-dependency CLI and Python clients, wire protocol v1.0.

Embedded task management engine: decision-point protocol, idea capture wall, Linear-style issue store.

A read_graph tool backed by a codebase knowledge graph (CONTAINS / EXPORTS / IMPORTS / IMPORTS_SYMBOL relations).

Bounded, cell-addressed `doc_read`/`doc_write` for xlsx / pdf / docx / pptx / ipynb, plus an MCP server and CLI.

HTML↔Markdown conversion, GFM table normalization, and TOC generation.

base64/url/hex encoding, common hashes, and UUID generation.

Parse/query/aggregate/convert CSV (RFC 4180) with a zero-dependency state-machine parser.

Search, list and read past and current sessions through the harness's own `sessionQuery` service: uses the SQLite FTS5 index where a deployment enables it, and falls back to a bounded newest-first scan where it does not.

Cross-session messaging for DSH: any session on the machine can list and message any other, Claude Code-style, via a local heartbeat registry and inbox.

Side web-preview panel: local static hosting, Markdown/code/image preview, one-click run of non-static projects (Cargo/npm/Go/Python) with live logs, drag files into the chat (saved to the workspace), element mark & annotate, workspace file search on 404, and link-click takeover into the side panel.

Native Windows desktop window (WebView2) for DSH: one-command install, auto-fetches the app zip from GitHub Releases, creates a desktop shortcut, and adds a desktop_launch tool to start it from chat.

Draggable grid-aligned workbench of 28 mini-cards in the margins of the conversation (API balance, token usage, cost, context pressure, todos, goal, usage heatmap, GitHub repo, image relay), with S/M/L/XL size tiers.

DeepSeek account balance and per-session cost card in the sidebar foot.

DeepSeek API spend (current session and all sessions) and account balance in the aside panel, with official pricing and peak/off-peak support.

Desktop pet for the DSH Web UI: sprite-sheet animation, agent state linkage, drag, alarm (daily/one-shot) and pomodoro widgets, skin picker with preview.

Deep links: open a specific session or workspace via `?session=` / `?workspace=`.

Interactive character for Harness Desktop with task expressions, rice feeding, an iron-basin hat, dragging, and time-based greetings.

Adds a Batch Uninstall page to the DSH settings dialog: a checklist of every installed bundle with multi-select, select-all, a confirmation dialog and per-plugin progress, where official bundles stay locked and each removal goes through the host pluginManager service.

Two-way bridge between GNU Emacs and a running DeepSeek Harness session over loopback HTTP + SSE: submit prompts, stream replies, manage sessions and workspaces, and answer ask-user/approval prompts from Emacs, with a Plugins-page card that installs the Emacs package.

Per-event sound alerts and system notifications for DeepSeek Harness. Four events — turn complete, question, approval and error — each get a switch, a sound picker with instant preview and a system-notification master switch. Nine built-in tones (four per-event defaults plus chime, bell, soft and alert, and a silent option) are synthesized at runtime with the Web Audio API, so no audio files ship with the package. A mode dropdown in General settings offers on, off and a smart mode that defers to the whale widget so the two never double up; the same row has a preview button and a gear opening a full settings dialog with volume, a skip-while-focused option and upload of your own audio up to 2 MB. A speaker button in the composer mutes sound without touching notifications. Works in the web GUI and the Electron desktop app.

Multi-agent roundtable discussion: each member runs as a subagent on its own model and speaks in turn, a host summarizes each round, and termination writes meeting-minutes Markdown.

Provides three learning skills for course notes, conceptual explanations, and self-contained lecture chapters, with bundled references and course helper scripts.