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vfox

vfox

A cross-platform SDK version manager

Runs as vfox|macOS, Linux, Windows|vfox.dev
Open form in Otty otty.toml

Command form

ai-draft · 4 tasks · 8 fields

Install and switch SDK versions with the vfox version manager.

Opens the form; the finished command lands at your prompt, unrun
Run in Otty
otty gui vfox

vfox install

Install SDK versions

Install one or more SDKs, e.g. nodejs@20.

Install SDK versionsExample values, fixed in this page — nothing here reaches a terminal
Basic
SDK@version*
string
Skip prompts
--yes
TasksEach one presets the form for one job
Install SDKs
sdksyes
Install everything in .vfox.toml
allyes
ParametersOnly these flags are editable in the form
SDK@version
string · positional 0 · repeatable
Install all from .vfox.toml
boolean
--all-a
Skip prompts
boolean
--yes-y
Reinstall
Replace an installed version with a fresh copy.
boolean
--reinstall

vfox use

Use an SDK version

Set the active version of an SDK in a scope.

Use an SDK versionExample values, fixed in this page — nothing here reaches a terminal
Basic
SDK[@version]*
string
Project scope*
--project
TasksEach one presets the form for one job
Use for this project
sdkproject
Use globally
sdkglobal
ParametersOnly these flags are editable in the form
SDK[@version]
Omit the version to pick from a list.
string · positional 0
Global scope
boolean
--global-g
Project scope
Effective in the current directory.
boolean
--project-p
Session scope
Effective in the current shell session.
boolean
--session-s
SourcesEvery flag above is checked against these
docs
vfox install nodejs@20 golang ... -a, --all: Install all SDK versions recorded in .vfox.toml -y, --yes: Quick installation, skip interactive prompts --reinstall: Replace an installed version with a fresh copy
manual2026-10-27

vfox.dev

docs
vfox use [options] <sdk-name>[@<version>] -g, --global: Effective globally -p, --project: Effective in the current directory($PWD) -s, --session: Effective within the current Shell session
manual2026-10-27

vfox.dev

Before it fills your prompt, Otty checks the installed vfox against its version. A form that does not match your version is not offered.