Forge
Terminal MCP server for AI coding agents. Spawn, manage, and monitor real PTY sessions via the Model Context Protocol.
forgemcp.dev
---
## Why
AI coding agents (Claude Code, Codex, etc.) typically run one command at a time. Forge gives them persistent terminals — run your React frontend, Java API, and Postgres migrations in parallel, monitor all three, and only read what changed. Full-stack work without the bottleneck.
Works with **any MCP-compatible client** — Claude Code, Codex, Gemini CLI, or your own agent.
**Key differentiators:**
- **Real PTY** via `node-pty` (same lib as VS Code terminal) — interactive programs, colors, TUI apps all work
- **Incremental reads** — ring buffer with per-consumer cursors means each `read_terminal` only returns NEW output, saving context window tokens
- **Clean screen reads** — `@xterm/headless` renders the terminal server-side, so `read_screen` returns exactly what a human would see (no ANSI escape codes)
- **Multi-agent orchestration** — spawn Claude, Codex, and Gemini sub-agents, session groups, output multiplexing, event subscriptions, and templates for managing multiple concurrent sessions
- **Web dashboard** — real-time Preact-based browser UI to watch what your agents are doing across all terminals, browse past chat sessions, and monitor activity
- **Zero config** — single `npx` command or HTTP MCP endpoint
## Install
```bash
# bun (recommended)
bun install -g forge-terminal-mcp
# npm (requires Node.js ≥ 18)
npm install -g forge-terminal-mcp
# Or standalone binary (no Node.js required)
curl -fsSL https://forgemcp.dev/install.sh | sh
```
After install, the `forge` command is available globally:
```bash
forge start # Start the server
forge start -d # Start as background daemon
forge start -d --dashboard --port 3141 # With web dashboard
```
### Update
```bash
# bun
bun update -g forge-terminal-mcp
# npm
npm update -g forge-terminal-mcp
# Standalone binary — re-run the install script
curl -fsSL https://forgemcp.dev/install.sh | sh
# Desktop app updates automatically on restart
```
## Quick Start
### 1. Add to Your Agent
Claude Code
```bash
# Recommended: auto-starts daemon and registers HTTP transport
forge setup --agent claude-code
# Or manually:
forge start -d # Start daemon in background
claude mcp add --transport http forge http://127.0.0.1:3141/mcp
```
> **Note:** Always use HTTP transport so Claude Code connects to the running daemon. This ensures sessions appear in the dashboard and avoids conflicts from isolated processes.
Codex
```bash
# Add Forge as HTTP MCP server
codex mcp add forge --url http://127.0.0.1:3141/mcp
# Verify
codex mcp list
codex mcp get forge
```
Codex stores this in `~/.codex/config.toml`:
```toml
[mcp_servers.forge]
url = "http://127.0.0.1:3141/mcp"
```
Gemini CLI
```bash
# Start Forge daemon first
npx forge-terminal-mcp start -d --dashboard --port 3141
# Add Forge as HTTP MCP server
gemini mcp add --transport http forge http://127.0.0.1:3141/mcp
```
HTTP MCP (any client)
Start the daemon (choose one launch mode), then point any MCP client at the HTTP endpoint:
```bash
# If forge is on PATH (global install or npm link)
forge start -d
# From this repo (local clone)
node dist/cli.js start -d
# Without install (published package)
npx forge-terminal-mcp start -d
```
```json
{
"mcpServers": {
"forge": {
"type": "http",
"url": "http://127.0.0.1:3141/mcp"
}
}
}
```
Restart your agent and Forge tools are available.
Important: Claude Code, Codex, and Gemini CLI load MCP servers at process start. If you add/remove servers, restart the current agent session.
### 2. Smoke Test (60s)
```bash
# Codex MCP registration
codex mcp list
codex mcp get forge
# Forge daemon status
node dist/cli.js status
```
Expected:
- `codex mcp list` shows `forge` as enabled
- `node dist/cli.js status` reports running and `http://127.0.0.1:3141`
### Troubleshooting
| Symptom | Fix |
|---------|-----|
| `forge: command not found` | Use `node dist/cli.js ...` from the repo root, or `npx forge-terminal-mcp ...`. |
| `No MCP servers configured yet` in Codex | Run `codex mcp add forge --url http://127.0.0.1:3141/mcp`, then restart Codex. |
| `listen EPERM ... 127.0.0.1:3141` | Run Forge in an environment that allows local port binding, or use a different port with `--port` and update the MCP URL to match. |
| A message appears typed but agent does not answer | The input may be queued; press `Enter` (or use `submit=true` when writing programmatically). |
| MCP server is configured but tools do not appear | Restart the current agent session so MCP servers reload. |
### 3. Use It
Your agent now has access to 23 tools across 7 categories:
**Session Lifecycle**
```
create_terminal → Spawn a PTY session with optional name, tags, buffer size
create_from_template → Spawn from a built-in template (shell, next-dev, vite-dev, etc.)
spawn_claude → Launch a Claude Code sub-agent in a dedicated session
spawn_codex → Launch a Codex sub-agent in a dedicated session
spawn_gemini → Launch a Gemini CLI sub-agent in a dedicated session
close_terminal → Kill a session and free resources
close_group → Close all sessions matching a tag
list_terminals → List sessions, optionally filtered by tag
list_templates → Show available session templates
```
**I/O**
```
write_terminal → Send input (appends newline by default)
read_terminal → Read NEW output since last read (incremental)
read_screen → Get rendered viewport as clean text (no ANSI)
read_multiple → Batch read from up to 20 sessions at once
send_control → Send Ctrl+C, arrow keys, Tab, Enter, etc.
resize_terminal → Change terminal dimensions
```
**Search & Wait**
```
grep_terminal → Regex search across a session's output buffer
wait_for → Block until output matches a pattern or process exits
```
**Execution**
```
run_command → Run a command to completion, return output, auto-cleanup
```
**Events**
```
subscribe_events → Get notified when a session exits or matches a pattern
unsubscribe_events → Cancel an event subscription
```
**Agent Delegation**
```
delegate_task → Delegate a task to another agent — oneshot or interactive multi-turn
```
**Ops**
```
health_check → Server version, uptime, session count, memory usage
get_session_history → Tool call history for agent sessions
clear_history → Clear persisted stale session entries
```
### Example Conversations
> **You:** Start a Next.js dev server and run the test suite in parallel
>
> **Agent:** *(uses `create_from_template` with "next-dev", `wait_for` "Ready", then creates a second session for `npm test`, uses `read_multiple` to poll both)*
> **You:** Spin up 3 sub-agents to research different parts of the codebase
>
> **Agent:** *(uses `spawn_claude` three times with tag "research", monitors with `list_terminals` filtered by tag, cleans up with `close_group`)*
> **You:** Build and test, just give me the result
>
> **Agent:** *(uses `run_command` with `npm run build && npm test` — creates terminal, waits for exit, returns output, auto-cleans up)*
## Best Practices
### `run_command` vs `create_terminal`
Use **`run_command`** when you want a result and don't need the session afterwards:
- Build steps (`npm run build`, `cargo build`)
- Test runs (`npm test`, `pytest`)
- Install commands (`npm install`, `pip install`)
- One-off scripts that exit cleanly
Use **`create_terminal`** when you need an ongoing session:
- Dev servers (`npm run dev`, `vite`, `next dev`)
- Watchers (`npm run watch`, `tsc --watch`)
- REPLs or interactive processes
- Long-running processes you'll poll with `read_terminal`
```
# Good — build is a one-shot task
run_command({ command: "npm run build && npm test" })
# Good — dev server needs to stay alive
create_terminal({ command: "npm run dev", name: "dev-server" })
wait_for({ id, pattern: "ready on" })
```
### `waitForExit` vs pattern matching
Use **pattern matching** (default) when the process stays alive after printing the signal:
```
wait_for({ id, pattern: "Server running on port 3000" })
# returns as soon as the line appears — process keeps running
```
Use **`waitForExit: true`** when the process exits naturally and you want all output:
```
wait_for({ id, pattern: ".", waitForExit: true })
# waits for the process to finish, returns everything
```
### `fromSession` for sub-agents
When spawning a sub-agent to work on the same project, use `fromSession` instead of hardcoding paths:
```
# Instead of this (brittle):
spawn_claude({ prompt: "...", cwd: "/Users/me/projects/my-app" })
# Do this (inherits cwd from current session):
spawn_claude({ prompt: "...", fromSession: currentSessionId })
```
This ensures the sub-agent works in the correct directory even when Forge is used across different machines or worktrees.
### Worktrees for parallel agents
When running multiple agents on the same codebase, use `worktree: true` to isolate changes:
```
spawn_claude({ prompt: "Add auth", worktree: true, branch: "feature/auth" })
spawn_claude({ prompt: "Add payments", worktree: true, branch: "feature/payments" })
# Both agents work in parallel without stepping on each other
```
## Tools Reference
### `create_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `command` | string | User's `$SHELL` | Command to run |
| `args` | string[] | `[]` | Command arguments |
| `cwd` | string | Process cwd | Working directory |
| `env` | object | `{}` | Additional env vars (merged with process env) |
| `cols` | number | 120 | Terminal width |
| `rows` | number | 24 | Terminal height |
| `name` | string | — | Human-readable session name |
| `tags` | string[] | — | Tags for filtering/grouping (max 10) |
| `bufferSize` | number | Server default | Ring buffer size in bytes (1 KB – 10 MB) |
Returns session info including the `id` used by all other tools.
### `create_from_template`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `template` | string | *required* | Template name (see `list_templates`) |
| `cwd` | string | — | Working directory override |
| `env` | object | — | Additional env vars |
| `name` | string | Template name | Session name override |
Built-in templates:
| Template | Command | Tags | Wait For |
|----------|---------|------|----------|
| `shell` | `$SHELL` | shell | — |
| `next-dev` | `npx next dev` | dev-server, next | "Ready" |
| `vite-dev` | `npx vite` | dev-server, vite | "Local:" |
| `docker-compose` | `docker compose up` | docker | — |
| `npm-test` | `npm test` | test | — |
| `npm-test-watch` | `npm run test:watch` | test, watch | — |
Templates with `waitFor` automatically block until the pattern appears (30s timeout).
### `spawn_claude`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `prompt` | string | *required* | Prompt to send to Claude |
| `cwd` | string | — | Working directory (explicit path) |
| `fromSession` | string | — | Copy `cwd` from an existing session ID (alternative to setting `cwd` manually) |
| `model` | string | — | Model (e.g., "sonnet", "opus") |
| `name` | string | Auto from prompt | Session name |
| `tags` | string[] | `["claude-agent"]` | Tags (claude-agent always included) |
| `maxBudget` | number | — | Max budget in USD |
| `bufferSize` | number | Server default | Ring buffer size |
| `worktree` | boolean | `false` | Create a git worktree (isolates file changes) |
| `branch` | string | — | Branch name for worktree (required when worktree: true) |
| `oneShot` | boolean | `false` | Run in `--print` mode (process prompt and exit) |
### `run_command`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `command` | string | *required* | Command to run (supports `&&` chaining) |
| `cwd` | string | — | Working directory |
| `timeout` | number | 300000 | Timeout in ms (max 5 minutes) |
Creates a terminal, waits for the process to exit, returns all output, and auto-cleans up the session. Ideal for build/test/install commands.
### `write_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `input` | string | *required* | Text to send |
| `newline` | boolean | `true` | Append `\n` after input |
### `read_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
Returns `{ status, data, bytes, droppedBytes? }`. Only returns output produced since the last read. If `droppedBytes > 0`, some output was lost because the ring buffer wrapped.
### `read_screen`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
Returns the current terminal viewport as plain text — rendered through a headless xterm instance. No ANSI codes. Useful for TUI apps like `htop`, `vim`, or interactive prompts.
### `read_multiple`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `ids` | string[] | *required* | Session IDs (1–20) |
| `mode` | string | `"incremental"` | `"incremental"` or `"screen"` |
Returns a JSON array with per-session results. Sessions that error (e.g., not found) include an inline `error` field — the tool never fails as a whole, so partial results are always returned.
### `grep_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `pattern` | string | *required* | Regex pattern |
| `context` | number | 0 | Lines of context around each match (0–10) |
Returns `{ matches: [{ lineNumber, text, context? }], totalMatches }`.
### `wait_for`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `pattern` | string | — | Regex pattern to wait for |
| `timeout` | number | 30000 | Timeout in ms (100–300000) |
| `waitForExit` | boolean | `false` | Wait for process to exit instead of pattern match |
Checks the existing buffer first (instant match if pattern already appeared), then watches new output. Returns `{ matched, data?, reason?, elapsed }`.
### `subscribe_events`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `events` | string[] | *required* | `["exit"]` and/or `["pattern_match"]` |
| `pattern` | string | — | Regex (required if `pattern_match` in events) |
Notifications are delivered as MCP logging messages with JSON payloads. Pattern match subscriptions auto-unsubscribe after the first match.
### `unsubscribe_events`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `subscriptionId` | string | *required* | Subscription ID from `subscribe_events` |
### `list_terminals`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `tag` | string | — | Filter sessions by tag |
Returns all sessions with `id`, `pid`, `command`, `cwd`, `status`, `cols`, `rows`, `createdAt`, `lastActivityAt`, `name`, `tags`.
### `close_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
### `close_group`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `tag` | string | *required* | Tag to match |
Closes all active sessions with the matching tag. Returns the count closed.
### `send_control`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `key` | string | *required* | Control key name |
Available keys: `ctrl+c`, `ctrl+d`, `ctrl+z`, `ctrl+\`, `ctrl+l`, `ctrl+a`, `ctrl+e`, `ctrl+k`, `ctrl+u`, `ctrl+w`, `ctrl+r`, `ctrl+p`, `ctrl+n`, `up`, `down`, `right`, `left`, `home`, `end`, `tab`, `enter`, `escape`, `backspace`, `delete`, `pageup`, `pagedown`
### `resize_terminal`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
| `cols` | number | *required* | New width (1–500) |
| `rows` | number | *required* | New height (1–200) |
### `health_check`
No parameters. Returns `{ version, uptime, sessions: { active, max }, memory: { rss, heapUsed, heapTotal } }`.
### `get_session_history`
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `id` | string | *required* | Session ID |
Returns timestamped tool call history for agent sessions (Claude, Codex).
### `clear_history`
No parameters. Clears persisted stale session entries from previous server runs.
## MCP Resources
Sessions are also exposed as MCP resources at `terminal://sessions/{sessionId}`, returning session metadata and rendered screen content. The resource list updates automatically when sessions are created or closed.
## Web Dashboard
Enable the real-time web dashboard to monitor all terminals from your browser:
```json
{
"mcpServers": {
"forge": {
"command": "npx",
"args": ["forge-terminal-mcp", "--dashboard", "--port", "3141"]
}
}
}
```
Open `http://localhost:3141` to see:
- **Live terminal sessions** with real-time output via WebSocket
- **Session grouping** — terminals organized by working directory
- **Activity log** — tool calls and events for agent sessions
- **Status bar** — working directory, session ID, running/exited status
- **Chat history browser** — search, browse, and continue past Claude Code and Codex conversations grouped by project
- **Session management** — create, close, and switch between terminals
- **Auto-follow mode** — automatically switch to newly created sessions
- **Memory monitoring** — per-session and total RAM usage
If `--auth-token` is enabled, open the dashboard with `?token=YOUR_TOKEN` so browser API/WebSocket calls are authorized.
The dashboard is built with Preact + htm + Preact Signals, loaded from CDN with zero build step. All UI code is bundled as string constants inside the server binary.
## Desktop App (macOS)
> **Note**: The pre-built macOS app is currently unavailable for general download. macOS requires apps to be code-signed with an Apple Developer certificate ($99/year) before they can be opened without security warnings. We're working on getting this set up — in the meantime, you can run the desktop app from source (see below) or use the CLI via `npx forge-terminal-mcp`.
Forge includes an Electron-based desktop app for macOS with native window management, system tray, and notifications.
### Running in Development
```bash
npm run build # Build forge core
cd desktop && npm install # Install Electron deps
npx @electron/rebuild # Rebuild node-pty for Electron
npm run dev # Launch the desktop app
```
Or from the repo root: `npm run desktop:dev`
### Features
- Native macOS title bar with traffic light integration
- System tray with session count, new terminal, start-at-login toggle
- Close-to-tray (app keeps running when window closed)
- Native notifications on session created/exited
- Window state persistence across restarts
- Auto-detects existing CLI daemon — connects to it or starts in-process
- Automatic updates via GitHub Releases (downloads silently, installs on restart)
- Security hardened: sandboxed renderer, navigation lock, CSP, permission deny-all
### Packaging
```bash
cd desktop
npm run package # Build DMG + ZIP
```
Produces a signed `Forge.app` in `desktop/release/`. Requires Apple Developer certificate for notarization (see `desktop/forge.entitlements.plist`).
## Configuration
All settings follow the precedence: **CLI flag > environment variable > default**.
| Flag | Env Var | Default | Description |
|------|---------|---------|-------------|
| `--max-sessions` | `FORGE_MAX_SESSIONS` | 10 | Max concurrent PTY sessions |
| `--idle-timeout` | `FORGE_IDLE_TIMEOUT` | 1800000 | Session idle timeout in ms (30 min) |
| `--buffer-size` | `FORGE_BUFFER_SIZE` | 1048576 | Ring buffer size per session (1 MB) |
| `--shell` | `SHELL` | `/bin/bash` | Default shell for `create_terminal` |
| `--claude-path` | `FORGE_CLAUDE_PATH` | `claude` | Path to Claude CLI binary |
| `--auth-token` | `FORGE_AUTH_TOKEN` | unset | Require Bearer token for `/mcp`, `/api`, and `/ws` |
| `--dashboard` | `FORGE_DASHBOARD` | off | Enable web dashboard |
| `--port` | `FORGE_DASHBOARD_PORT` | 3141 | Dashboard port |
| `--verbose` | — | off | Enable debug logging to stderr |
Example with custom config:
```json
{
"mcpServers": {
"forge": {
"command": "npx",
"args": ["forge-terminal-mcp", "--max-sessions", "20", "--idle-timeout", "3600000", "--dashboard"]
}
}
}
```
## Architecture
```
MCP Client <--HTTP--> MCP Server (23 tools + 1 resource)
(Claude Code,
Codex, etc)
|
SessionManager
(lifecycle, groups, persistence)
|
+---------+---------+
v v v
TerminalSession TerminalSession ...
+---------------+
| node-pty | <-- real PTY (colors, signals, TUI)
| RingBuffer | <-- 1 MB circular, per-consumer cursors
| @xterm/headless| <-- server-side rendering
+---------------+
|
+---------------+---------------+
v v v
MCP Client Dashboard WS Event Subs
(incremental) (live stream) (notifications)
```
- **Single Node.js process** — MCP server communicates over HTTP (streamable)
- **All logging to stderr** — stdout is reserved for the MCP protocol
- **Ring buffer per session** — 1 MB circular buffer with cursor-based reads. When the buffer fills, old data is overwritten and `droppedBytes` tells the consumer how much was lost
- **Headless xterm per session** — full terminal emulation server-side. `read_screen` returns the rendered viewport, correctly handling cursor positioning, alternate screen, line wrapping
- **Idle timeout** — sessions auto-close after 30 minutes of inactivity (configurable)
- **Session persistence** — session metadata saved to `~/.forge/sessions.json`, reloaded as stale entries on restart
- **Event system** — subscribe to session exit or pattern match events, delivered as MCP logging messages
- **Agent env stripping** — spawned terminals have agent-specific env vars (e.g., `CLAUDECODE`) removed to prevent nesting errors
## Development
```bash
git clone https://github.com/ferodrigop/forge-terminal-mcp.git
cd forge-terminal-mcp
npm install
npm run build # Compile with tsup
npm test # 161 tests (unit + integration)
npm run typecheck # TypeScript strict mode
npm run lint # ESLint
npm run dev # Watch mode
```
### Project Structure
```
src/
cli.ts # Entry point, arg parsing, daemon management
server.ts # McpServer + 22 tool registrations + resources
core/
types.ts # ForgeConfig, SessionInfo, defaults
ring-buffer.ts # Circular buffer with multi-consumer cursors
terminal-session.ts # PTY + headless xterm + ring buffer
session-manager.ts # CRUD, max sessions, groups, persistence
state-store.ts # ~/.forge/sessions.json persistence
templates.ts # Built-in session templates
claude-chats.ts # Claude Code chat session discovery
command-history.ts # Tool call history tracking
dashboard/
dashboard-server.ts # HTTP + WebSocket + MCP transport server
dashboard-html.ts # HTML assembler (imports frontend parts)
ws-handler.ts # WebSocket message handling
frontend/
styles.ts # CSS styles (Tokyo Night theme)
state.ts # Preact Signals + WebSocket + chat API
utils.ts # timeAgo, formatSize, formatToolBlock
app.ts # Root App component + JS concatenation
assets.ts # Base64-embedded favicon + logo
components/
sidebar.ts # Session list, chat browser, connection status
terminal-view.ts # XTerm container, activity log, status bar
chat-view.ts # Chat message viewer with bubbles
modals.ts # New terminal + delete chat modals
utils/
logger.ts # stderr-only JSON logger
config.ts # CLI flags > env vars > defaults
control-chars.ts # Named key -> escape sequence map
daemon.ts # Daemon lifecycle (PID, port, lock files)
desktop/
main/
index.ts # Electron main process entry
daemon.ts # Forge server lifecycle (start/detect existing)
window.ts # BrowserWindow + state persistence
preload.ts # Context bridge (forgeDesktop API)
tray.ts # System tray + context menu
menu.ts # macOS application menu
notifications.ts # Native notification bridge
auto-launch.ts # Login item registration
html-server.ts # Lightweight HTTP server for desktop HTML
daemon-bridge.ts # WebSocket relay to existing daemon
updater.ts # Auto-update via GitHub Releases
electron-builder.yml # Build config (DMG, universal binary)
forge.entitlements.plist # macOS entitlements
test/
unit/ # ring-buffer, config, control-chars, state-store, templates
integration/ # terminal-session, session-manager, mcp-tools E2E
```
### Test Coverage
| Suite | Tests | Covers |
|-------|-------|--------|
| Ring Buffer | 13 | Circular writes, multi-consumer, wrap-around, dropped bytes |
| Config | 10 | CLI parsing, env vars, defaults, precedence, codex path |
| Control Chars | 6 | Key resolution, case insensitivity, unknown keys |
| State Store | 4 | Load/save round-trip, corruption handling |
| Templates | 3 | Lookup, unknown template, list all |
| Stream JSON Parser | 11 | Claude event parsing, tool use extraction |
| Terminal Session | 8 | PTY spawn, read/write, screen render, resize, exit |
| Session Manager | 7 | CRUD, max limit, close all, stale entries |
| MCP Tools E2E | 51 | All 23 tools end-to-end via MCP client |
| Forge 0.7 Features | 28 | Codex spawn, worktree, dashboard API, chat history |
| Command History | 6 | Event tracking, retrieval, cleanup |
| Claude Chats | 14 | Session discovery, message parsing, search |
| **Total** | **161** | |
## Requirements
- Node.js >= 18
- macOS, Linux, or Windows (anywhere `node-pty` builds)
## License
MIT