dsh-cloud-workspaces

Cloud workspaces for DeepSeek Harness (DSH).

Pick Cloud (SSH) in DSH's workspace picker, and the coding agent works directly on your Linux server: bash, read, write, edit, glob, grep — the entire built-in toolset — transparently execute over SSH. Files, search, editing and terminal all live on the remote box.

Zero install on the server. No vscode-server-style remote agent, no daemon, nothing to download — a standard OpenSSH server is all it takes.

中文文档：README.zh-CN.md

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Why

DSH's agent runs on your local machine. When your code, data or production box lives on a remote Linux server, you either SSH in separately or fight with sync tools. Competing remote solutions ship a fat remote component (hundreds of MB) that must be downloaded to the server on first connect.

dsh-cloud-workspaces takes a different route: everything rides standard SSH channels (exec / SFTP / PTY via ssh2). The server needs nothing beyond what it already has.

Features

Cloud workspaces (the headline)

• Dual-tab workspace picker — "Local" and "Cloud (SSH)" tabs; cloud workspaces are adopted by DSH's official workspace registry and show up in every session picker as host / path.
• Transparent toolset redirect — when a session's cwd falls under a cloud placeholder, the plugin replaces the official ctx.fs (13 file methods) and ctx.subprocess seams with SSH-backed implementations. Local sessions are untouched; the seam is swapped per session scope.
• Shadow tools with official UI — session-scoped remote bash / read / write / edit / glob / grep register in the agent's scope only, and implement the official presentCall / presentResult presenters, so chat rows render as real terminal / read / search cards — expandable, copyable, native.

SSH settings card (in DSH Settings → SSH Connections)

• Host manager — display name, host, port, user; password auth (keyboard-interactive aware — works with PAM/Ubuntu servers that never offer the plain password method) or private key (path; ssh-agent fallback).
• Connection test — one-click probe with latency; saved credentials are reattached server-side (the browser only ever sees a redacted view).
• Remote directory browser — list, navigate, create and delete folders on the server; then bind any directory as a cloud workspace in one click.
• ProxyJump — jump-host chains, per-hop credentials.

Agent tools

• ssh_list / ssh_exec / ssh_ls / ssh_read / ssh_write — explicit remote access from any session (subject to preset scoping).
• ssh_workspace — create a cloud workspace binding from chat.

Connection layer

• ssh2 connection pooling with keepalive, broken-connection detection and transparent rebuild.
• Per-host latency-tested test endpoint reused by both the settings card and the picker.

Security

• Hosts are stored in DSH's settings namespace; password fields are write-only secrets — the browser receives a redacted view and can never read stored credentials back.
• Remote sessions are scoped: shadow tools exist only inside sessions bound to a cloud workspace. Local workspaces are never affected.
• Remote file reads are capped; large files stream instead of buffering into memory.

Install

Requires DSH (web profile), Node ≥ 22, and a reachable SSH server.

From npm

dsh plugin --profile web add dsh-cloud-workspaces

From source

git clone https://github.com/harryopo/dsh-cloud-workspaces.git
cd dsh-cloud-workspaces
pnpm install
pnpm build

# link into the DSH web profile (use a junction on Windows if the path has spaces)
dsh plugin --profile web add link:C:\path\to\dsh-cloud-workspaces

Restart dsh web after installing or rebuilding (the host half loads in the Node process).

Usage

1. Add a host — Settings → SSH Connections → Add host → fill credentials → Test → Save.
2. Bind a cloud workspace — Add workspace → Cloud (SSH) tab → pick host → browse to your project → Use this directory as workspace.
3. Open a session on that workspace — the agent now runs entirely on the server. Ask it: run pwd, then list the files here and watch bash execute remotely.
4. Or drive it explicitly: use ssh_exec to run docker ps on web-1.

Architecture

DSH host process (Node)
┌────────────────────────────────────────────────────────────┐
│  ctx.fs ────────► fs-ssh adapter ──────┐                    │
│  ctx.subprocess ► subprocess-ssh ──────┤   seam swap per    │
│  shadow tools ─► session scope ────────┘   session scope   │
│                                          │                 │
│  SshEngine (ssh2) ◄──────────────────────┘                 │
│   ├─ connection pool / keepalive / rebuild                 │
│   ├─ exec · SFTP CRUD · PTY                                │
│   └─ ProxyJump hops                                        │
└──────────────┬─────────────────────────────────────────────┘
               │ SSH (exec / sftp / pty)  — nothing else
        ┌──────▼──────┐
        │ Linux server │  stock sshd. zero remote install.
        └─────────────┘

Browser (dsh web GUI): settings card + cloud-workspace picker
speak to the host over the official Typert remote bridge.

• Host half (src/, TypeScript): SshEngine, fs-ssh / subprocess-ssh adapters, session tool registration, Typert remote endpoints, settings schema.
• Client half (client/, plain ESM React via createElement): settings section + dual-tab workspace picker injected through official slots (settings.section, workspace.*). No JSX build step, --dsw-* design tokens only.

Development

pnpm build        # tsc d.ts + tsdown bundle
pnpm typecheck    # tsc --noEmit
pnpm test         # vitest — 100 unit tests
node scripts/e2e-real-server.mjs   # 25 E2E tests over a real SSH server (WSL sshd on 127.0.0.1:2223)

Roadmap

• SSH engine: pooling, keepalive, broken-connection rebuild, ProxyJump
• Cloud workspaces: dual-tab picker, placeholder dirs, official adoption
• Transparent ctx.fs / ctx.subprocess redirect
• Shadow tools with official terminal/read cards
• Settings card: hosts, password/key auth (keyboard-interactive), test, remote dir browser
• Background remote jobs (ctx.jobs)
• Remote search tuning (ripgrep detection on the server)
• SSH tunnel (local port forwarding)
• npm first release (dsh-cloud-workspaces@0.2.1)

Acknowledgements

• DeepSeek Harness — the harness and its official plugin SDK (@deepseek-ai/dsh-*); this plugin builds only on official npm SDK packages.
• dsh-ssh (Apache-2.0) — UI patterns for the settings card and workspace placeholder design.
• ssh2 (MIT) — the SSH transport.

License

Apache-2.0