How do I install the X Env skill?

Run npx skillmds add x-cmd/x-env in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is X Env safe to use?

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Which AI agents work with X Env?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is X Env free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under Apache-2.

x-cmd (@x-cmd) published this skill. Their other Agent Skills are listed on their SkillMD profile.

X Env by x-cmd — Agent Skill

Name: X Env
Rating: 4.666666666666667 (3 reviews)
Author: x-cmd

X Env

x-env is x-cmd's environment and package management module for installing and managing third-party software, programming language runtimes, and command-line tools. Use this skill when: installing or managing runtimes (node, python, go, bun, java, rust); installing CLI tools (jq, yq, fzf, himalaya, claude-code); managing multiple software versions (specify versions, switch versions); cleaning up unused packages; viewing installed software paths or dependencies; asking how to install software; temporarily using software in current shell session (try); permanently installing software to user environment (use); upgrading installed software versions; running scripts with specific software versions. This is the core package manager in x-cmd ecosystem.

x-cmd 0829b4c 2 files · 8.4 KB Updated Sep 10, 2026

File contents

x env - Environment & Package Manager

Prerequisites

Load x-cmd before use:
```
. ~/.x-cmd.root/X
```
x-cmd not installed? → data/install.md

Core Concepts

try: Temporarily use software in current shell session (only valid for current terminal)
use: Permanently install software to user environment (persists after terminal restart)
untry: Cancel temporarily tried software in current session
unuse: Remove installed software from user environment
upgrade: Upgrade installed software versions

Core Functions

List available versions: x env la <pkg>
List installed packages: x env ls, x env ll
Temporary use (try): x env try <pkg>[=<version>]
Permanent install (use): x env use <pkg>[=<version>]
Remove package: x env unuse <pkg>
Upgrade package: x env upgrade <pkg>
Cleanup packages: x env gc <pkg>
Find command path: x env which <cmd>
Check dependencies: x env depend <pkg>

Usage Examples

Install packages

x env use node              # Install default version of node
x env use python            # Install default version of python
x env use go=v1.21.0        # Install specific version
x env use node python go    # Install multiple packages

Temporary use (current shell session only)

x env try node              # Use default node in current session
x env try bun go=v1.17.13   # Use multiple packages with versions
x env untry node            # Cancel temporary use

Version management

x env use --upgrade --all   # Upgrade all installed packages
x env use --upgrade jq yq   # Upgrade specific packages
x env upgrade node python   # Upgrade packages (shorthand)

List and search

x env la node               # List all available node versions
x env ls                    # List packages in use
x env ll                    # List all installed packages
x env which node            # Show node installation path

Cleanup

x env gc jq yq              # Remove specified packages and orphans

Common Scenarios

Install node: x env use node
Install python: x env use python
Install go: x env use go
Install jq: x env use jq
Install specific version: x env use node=v18.12.0
Temporary try: x env try node
Upgrade all: x env upgrade --all
Find path: x env which node

Get Help

Run x env --help for full help documentation.

---name: x-envdescription: x-env is x-cmd's environment and package management module for installing and managing third-party software, programming language runtimes, and command-line tools. Use this skill when: installing or managing runtimes (node, python, go, bun, java, rust); installing CLI tools (jq, yq, fzf, himalaya, claude-code); managing multiple software versions (specify versions, switch versions); cleaning up unused packages; viewing installed software paths or dependencies; asking how to install software; temporarily using software in current shell session (try); permanently installing software to user environment (use); upgrading installed software versions; running scripts with specific software versions. This is the core package manager in x-cmd ecosystem.license: Apache-2.0---# x env - Environment & Package Manager## Prerequisites1. Load x-cmd before use: ```bash . ~/.x-cmd.root/X ```2. x-cmd not installed? → [data/install.md](data/install.md)## Core Concepts- **try**: Temporarily use software in current shell session (only valid for current terminal)- **use**: Permanently install software to user environment (persists after terminal restart)- **untry**: Cancel temporarily tried software in current session- **unuse**: Remove installed software from user environment- **upgrade**: Upgrade installed software versions## Core Functions- **List available versions**: `x env la <pkg>`- **List installed packages**: `x env ls`, `x env ll`- **Temporary use (try)**: `x env try <pkg>[=<version>]`- **Permanent install (use)**: `x env use <pkg>[=<version>]`- **Remove package**: `x env unuse <pkg>`- **Upgrade package**: `x env upgrade <pkg>`- **Cleanup packages**: `x env gc <pkg>`- **Find command path**: `x env which <cmd>`- **Check dependencies**: `x env depend <pkg>`## Usage Examples### Install packages```bashx env use node # Install default version of nodex env use python # Install default version of pythonx env use go=v1.21.0 # Install specific versionx env use node python go # Install multiple packages```### Temporary use (current shell session only)```bashx env try node # Use default node in current sessionx env try bun go=v1.17.13 # Use multiple packages with versionsx env untry node # Cancel temporary use```### Version management```bashx env use --upgrade --all # Upgrade all installed packagesx env use --upgrade jq yq # Upgrade specific packagesx env upgrade node python # Upgrade packages (shorthand)```### List and search```bashx env la node # List all available node versionsx env ls # List packages in usex env ll # List all installed packagesx env which node # Show node installation path```### Cleanup```bashx env gc jq yq # Remove specified packages and orphans```## Common Scenarios- **Install node**: `x env use node`- **Install python**: `x env use python`- **Install go**: `x env use go`- **Install jq**: `x env use jq`- **Install specific version**: `x env use node=v18.12.0`- **Temporary try**: `x env try node`- **Upgrade all**: `x env upgrade --all`- **Find path**: `x env which node`## Get HelpRun `x env --help` for full help documentation.

Frequently asked questions