dsh-tui

A full-screen interactive terminal UI for the DeepSeek Harness agent runtime — the web UI, reimagined for the terminal.

dsh-tui runs the official DeepSeek Harness agent (tools, file editing, shell, subagents, sessions, permissions, plan mode) behind a Claude Code / opencode-style interface — live token streaming, reasoning blocks, boxed tool cards, prompt history, and a full slash-command suite. No browser, no Electron, just your terminal.

It is not a model wrapper or a plain chat REPL — it drives the real agent runtime.

---

Features

• Live streaming — answers render token-by-token as the model generates.
• Reasoning display — thinking blocks stream dim/italic, with per-turn effort control (/model <id> high).
• Tool cards — box-drawn ⏱ bash blocks with lifecycle markers (● running → ✓ done / ✖ error) and arg/result previews.
• Full agent toolkit — the agent can read/edit files, run commands, delegate subagents, and execute plans.
• Session management — list and resume any persisted session (/resume).
• Permission modes — read-only / workspace-write / danger-full-access, switchable live (/permissions).
• Plan mode — toggle plan-first behavior (/plan).
• Compaction — shrink the conversation on demand (/compact).
• Trajectory — a filtered event timeline of the whole session (/trajectory).
• Diagnostics — environment + model-catalog health check (/doctor).
• Scrollback — mouse wheel / PgUp / PgDn, with ↑ N indicator.
• Markdown rendering — fenced code blocks, inline code, bold, headings, lists.
• Cross-platform — macOS and Linux terminals (iTerm2, Terminal.app, kitty, alacritty, xterm, …).

---

Install

dsh-tui is a DeepSeek Harness plugin. You need the official dsh installed first:

# 1. Install the official DeepSeek Harness (once)
npx @deepseek-ai/dsh web --help   # or: npm i -g @deepseek-ai/dsh

# 2. Create a `tui` profile and add this plugin
dsh plugin --profile tui add @nexlineai/dsh-tui

# 3. Run it
dsh --profile tui

The profile initializes on first use; dsh-tui composes over the same @deepseek-ai/dsh-base core as the web UI.

Model key

export DEEPSEEK_API_KEY=sk-...

The TUI uses the same credential sources as the harness (DEEPSEEK_API_KEY / settings.yaml).

---

Demo

A representative session transcript — streaming answer, reasoning block, tool card, trajectory, doctor, model picker — is in demo/session.md.

---

Commands

Command	Description
/help	list commands
/model	list models + reasoning efforts; ● active marks current
/model <id> [effort]	switch live, e.g. /model deepseek-v4-pro high
/resume	list persisted sessions (id, title, date)
/resume <n>	continue that session with full history
/permissions	list permission presets
/permissions <name>	switch (read-only / workspace-write / danger-full-access)
/plan	toggle plan mode
/compact	compact the conversation now
/trajectory	show the session event timeline
/settings	one-screen summary of model/permission/plan/stream state
/doctor	environment + model catalog health check
/version	dsh-tui + runtime versions
/status	session, cwd, event and turn counts
/reasoning on|off	show/hide the thinking display
/stream on|off	toggle live token streaming
/clear	clear the conversation area
/exit (or q, quit, :q, Ctrl+D)	leave

---

Keybindings

Key	Action
Enter	submit
↑ / ↓	prompt history
← / →	move cursor
Home / End (Ctrl+A / Ctrl+E)	line start / end
Backspace / Delete	delete
Ctrl+U / Ctrl+K	kill to start / end
Ctrl+W	delete previous word
Esc	clear the input line
Tab	complete a slash command
Ctrl+C	clear (empty → exit)
Ctrl+D	exit
PgUp / PgDn / mouse wheel	scroll the conversation

---

Layout

┌ DeepSeek Harness TUI            deepseek-official/deepseek-v4-pro · session a1b2c3d4 ┐
│ ─────────────────────────────────────────────────────────────── 15:35:34 · 2s · 12→45 tok │
│ ❯ list the files                                                                     │
│ ✻ thinking                                                                            │
│   · a simple listing; I'll use bash ls                                                 │
│ This is the repository root — a plugin-based agent harness with pnpm workspaces...    │
│ ┌─ ⏱ bash ──────────────────────────────────────────────────────────────────────────┐ │
│ │ $ ls -la                                                                           │ │
│ └─ ✓ done ───────────────────────────────────────────────────────────────────────────┘ │
│ ❯ your input                                                                          │
│ ~/project · stream on · 1 turns · 500→120 tok                              ↑ /help  │
└───────────────────────────────────────────────────────────────────────────────────────┘

---

How it differs from the web UI

Same agent, same permissions, same sessions — but everything happens in your terminal. dsh-tui is aimed at people who live in a terminal, want a keyboard-first flow, or run the harness over SSH / inside a multiplexer like herdr or tmux.

Why a separate CLI?

The official dsh ships a web UI and a one-shot headless mode — no interactive terminal agent. dsh-tui fills that gap as an installable plugin, without forking the runtime.

---

License

MIT — see LICENSE. Not affiliated with DeepSeek AI; the runtime it drives is MIT-licensed upstream.