Dew

Sandboxed Linux compute, agent-native and human-friendly.

Boot a real Linux environment locally. Drive it from a shell, a script, or an agent.

$ dew up
  detected: vite (npm)
  ✓ http://localhost:5173

$ dew exec --json "go test ./..."
  {"stdout":"PASS\nok  ./...","exitCode":0}

Install

# macOS / Linux
curl -fsSL https://dewvm.dev/install.sh | sh

# macOS Homebrew
brew install solcreek/tap/dew

# npm (all platforms)
npm install -g dew

# Windows (PowerShell)
irm https://github.com/solcreek/dew/releases/latest/download/install.ps1 | iex

One-off try-out without installing: npx dew run -- uname -a works too. Once dew is installed (brew, install.sh, or npm install -g), call dew directly — npx dew always resolves the npm package and ignores the binary already on your PATH, adding startup overhead on every call.

Then try:

dew run -- uname -a
# (first time: downloads kernel + minimal initramfs, ~15s; then boots a
#  real Linux VM and prints its uname)

What it does

Dev environments

Auto-detects your project and starts a dev environment with hot reload.

cd my-vite-app
dew up                               # detect, boot, install, start
dew up --with postgres,redis          # dev with services
dew down                             # stop

Supports: Vite, Next.js, Astro, Nuxt, SvelteKit, Django, Flask, FastAPI, static HTML.

Share instantly

Temporary public HTTPS URL for any local port. Zero config, zero account.

dew share 3000
  ✓ https://random-words.trycloudflare.com
  Press Ctrl+C to stop

Deploy to a VPS

Build locally, deploy to any VPS. No extra runtime on the server.

dew build                             # package app (421KB tarball)
dew server create --provider hetzner  # provision VPS ($5/mo)
dew deploy 5.161.53.168               # deploy with SSE progress

The server runs dew serve (7.1MB Linux binary) — containerd for isolation, self-signed TLS, health checks.

dew server create auto-discovers an SSH public key from ~/.ssh/id_ed25519.pub (or id_rsa.pub) and locks root password auth in the same boot. Override with --ssh-key, the DEW_SSH_KEY env, or --no-ssh-key to keep the provider's emailed password.

DigitalOcean Web Console caveat: if you ever need to paste a long command (an SSH key, a recovery script) into DO's browser console, note that it does not support bracketed paste — long lines wrap and corrupt mid-paste. Prefer --ssh-key at create time so SSH works from the first boot and the console isn't needed.

Agent integration

Every command supports --json for machine-readable output and --dry-run for validation without execution.

dew up --dry-run --json
# {"type":"dry-run","framework":"vite","profile":"node",...}

dew deploy prod --dry-run
# Would deploy my-app.tar.gz to https://prod:9080
# No changes made.

dew run --json -- npm test
# {"exit_code":0,"stdout":"5 passing\n"}

Input hardening: rejects path traversal, query injection, control characters. --events for NDJSON lifecycle streaming.

AI agent skills

dew ships agentskills.io-compatible skill files that teach coding agents (Claude Code, Cursor, Codex, Copilot, Gemini CLI, 70+ others) how to use the CLI correctly — including when not to reach for it.

npx skills add solcreek/dew

Installs four skills: dew-server-create, dew-deploy, dew-diagnose, dew-upgrade. Source lives in skills/ and versions with each release.

Architecture

Local                       Linux server
─────                       ────────────
dew                         dew (deploy receiver)
├── dew up                  ├── HTTP deploy API
├── dew run                 ├── containers
├── dew exec                ├── TLS
├── dew build               ├── process management
├── dew deploy ──────────→  └── health check
└── Linux VM
    └── containers inside

Profiles

| Profile | Use case | |---|---| | minimal | Generic Linux shell, lightest footprint | | node | Node.js / npm projects | | python | Python projects | | standard | Containers, services |

Running x86_64 (amd64) containers on Apple Silicon

Add --rosetta to mount Apple's Rosetta translator into the guest and register binfmt_misc, so amd64 binaries and containers run transparently under translation:

dew run --profile standard --network --rosetta -- \
  nerdctl run --rm --platform linux/amd64 alpine uname -m   # -> x86_64

Apple Silicon only (Intel Macs have no Rosetta-for-Linux). Performance depends on the workload's hot path: roughly 70-80% of native for ordinary compiled code, less for interpreter-heavy or crypto/SIMD-heavy code. For peak performance prefer a native linux/arm64 image.

Security

• Hardware-VM isolation. Network off until you flip --network. Input validated against path traversal, control characters, and injection.

Full command reference

Dev:
  dew up [dir]                   Start dev environment
  dew up --with postgres,redis   Dev with services
  dew down                       Stop dev environment

Share:
  dew share [port]               Temporary public HTTPS URL

Deploy:
  dew build [dir]                Package app for deployment
  dew deploy <target>            Deploy to remote server
  dew env ...                    Manage environment variables
  dew auth ...                   Manage credentials

Infrastructure:
  dew server create [--provider]  Provision a VPS
  dew server list                 List managed servers
  dew server destroy <name>       Remove a server
  dew serve                       Run deploy receiver (VPS)

Advanced:
  dew run [--] <cmd>             Execute in ephemeral VM
  dew exec <cmd>                 Execute in running VM
  dew assets ...                 Manage VM images
  dew update                     Update to latest version

Output:
  --json        Machine-readable JSON (all commands)
  --events      NDJSON lifecycle stream
  --dry-run     Validate without executing

License

MIT