Agent skill

Asdf

A skill your agent uses whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager.

MITAuto-check: notesDevOps & Cloud

Install Asdf

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install jjmartres/opencode asdf --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .claude/skills && cp -r skills-src/opencode/skills/asdf .claude/skills/asdf && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .claude/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install jjmartres/opencode asdf --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .agents/skills && cp -r skills-src/opencode/skills/asdf .agents/skills/asdf && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .agents/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install jjmartres/opencode asdf --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/opencode/skills/asdf .cursor/skills/asdf && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .cursor/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/jjmartres/opencode.git --path opencode/skills/asdf

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install jjmartres/opencode asdf --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/opencode/skills/asdf .gemini/skills/asdf && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .gemini/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install jjmartres/opencode asdf

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .github/skills && cp -r skills-src/opencode/skills/asdf .github/skills/asdf && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .github/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jjmartres/opencode --skill asdf -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install jjmartres/opencode asdf --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jjmartres/opencode.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/opencode/skills/asdf .opencode/skills/asdf && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "asdf" agent skill from https://github.com/jjmartres/opencode/tree/main/opencode/skills/asdf into .opencode/skills/asdf/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "asdf", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: asdf
GitHub stars: 133
Token cost: ~2.1k tokens
SKILL.md length: 510 words
Files: 1
Skills in repo: 11
Repo updated: Apr 20, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

A skill your agent uses whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager.

The user wants to install
SKILL.md covers When to Use This Skill, Core Concepts, Installation and Essential Commands, plus 7 more sections
Calls asdf, git and python; reaches github.com
Use asdf (asdf-vm)

What it does

Asdf is an agent skill from jjmartres/opencode. Use this skill whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager. Trigger for any mention of asdf, .tool-versions files, managing runtime versions, switching between versions of Node.js, Python, Ruby, Go, Terraform, kubectl, Java, Erlang, Elixir, or any other tool managed by asdf. Also trigger when migrating from nvm, pyenv, rbenv, goenv, tfenv, or similar single-language version managers. Use this skill for help with asdf plugins, asdf install, asdf…

Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: opencode

It sits in DevOps & Cloud, covering Container orchestration and Infrastructure as code. It works with Bash, Node.js, Kubernetes and Terraform. The repository describes itself as: A powerful, custom opencode configuration, complete with a suite of agents, commands, rules, skills, and a pre-configured MCP server. It's designed to be a flexible starting… The licence is MIT.

When your agent uses it

The user wants to install
Use asdf (asdf-vm)
The universal version manager
Any mention of asdf

Example prompts

“/asdf”

Requirements

Python 3
Node.js
Compatibility (from SKILL.md): opencode

What it can do on your machine

Read from SKILL.md and the folder at commit 28dc323. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- asdf
- git
- python
- apt
- brew
- node
- terraform
- kubectl
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- github.com
Also links to:
- asdf-vm.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
opencode
From compatibility in the SKILL.md frontmatter.

Context cost

Asdf loads about 2.1k tokens when it runs. Until then it costs about 158 tokens; SKILL.md has 510 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~158
When it runs · the whole SKILL.md, loaded when a task matches: ~2.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteRuns commands with sudoSKILL.md:47
```
sudo apt install -y git curl
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jjmartres/opencode at commit 28dc323, republished under its MIT licence (© jjmartres). 510 words, ~2,119 tokens.

Download SKILL.mdSave it as .claude/skills/asdf/SKILL.md (or your agent's skills folder).

name: asdf
description: Use this skill whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager. Trigger for any mention of asdf, .tool-versions files, managing runtime versions, switching between versions of Node.js, Python, Ruby, Go, Terraform, kubectl, Java, Erlang, Elixir, or any other tool managed by asdf. Also trigger when migrating from nvm, pyenv, rbenv, goenv, tfenv, or similar single-language version managers. Use this skill for help with asdf plugins, asdf install, asdf set/global/local, troubleshooting shims, Fish/Bash/Zsh shell configuration, and multi-project version isolation workflows.
compatibility: opencode
license: MIT

asdf Version Manager Skill

asdf is a universal CLI version manager — one tool to replace nvm, pyenv, rbenv, tfenv, goenv and more. It manages per-project versions via .tool-versions files and switches versions automatically as you navigate directories.

When to Use This Skill

Use this skill when the user is:

Installing or setting up asdf on a new machine (any OS, any shell)
Adding plugins for a language or tool (Node.js, Python, Go, Terraform, kubectl, Helm, etc.)
Installing or switching versions of any tool managed by asdf
Managing .tool-versions files — creating, editing, or understanding version resolution
Migrating from single-language version managers like nvm, pyenv, rbenv, goenv, tfenv, or sdkman
Configuring shell integration for Bash, Zsh, Fish, or Elvish
Debugging version resolution — wrong version active, shims not working, command not found errors
Onboarding to a project that uses .tool-versions for reproducible environments
Setting up CI/CD pipelines that need deterministic tool versions via asdf
Configuring .asdfrc for legacy file support, concurrency, or plugin repository settings

Core Concepts

Plugin: Adapter for a specific tool (nodejs, python, terraform, kubectl, etc.)
Tool: The actual runtime/binary managed (e.g., Node.js 20.11.0)
.tool-versions: Project-level file declaring exact versions; asdf resolves it by traversing up the directory tree to $HOME
Shims: Lightweight wrappers in ~/.asdf/shims/ that intercept tool invocations and dispatch to the right version
Version scopes: project (.tool-versions in cwd) → parent dirs → $HOME/.tool-versions → env var ASDF_${TOOL}_VERSION

Installation

Dependencies (all platforms)

bash

# Debian/Ubuntu
sudo apt install -y git curl

# macOS
brew install git curl

Install asdf binary (recommended: binary download)

bash

# Download latest release from https://github.com/asdf-vm/asdf/releases
# Or via git clone (classic method):
git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.16.7

Shell Configuration

Fish shell (Jean-Jacques' setup):

fish

# Add to ~/.config/fish/config.fish
source ~/.asdf/asdf.fish

# Install completions
mkdir -p ~/.config/fish/completions
ln -s ~/.asdf/completions/asdf.fish ~/.config/fish/completions/asdf.fish

Bash:

bash

# Add to ~/.bashrc or ~/.bash_profile
. "$HOME/.asdf/asdf.sh"
. "$HOME/.asdf/completions/asdf.bash"

Zsh:

zsh

# Add to ~/.zshrc
. "$HOME/.asdf/asdf.sh"

After configuration, restart shell or source the config file.

Essential Commands

Plugin Management

bash

asdf plugin list all              # Browse all available plugins
asdf plugin list all | grep terra # Search for specific plugins
asdf plugin add nodejs            # Add plugin by shortname (from registry)
asdf plugin add nodejs https://github.com/asdf-vm/asdf-nodejs.git  # Add by URL
asdf plugin list                  # List installed plugins
asdf plugin update nodejs         # Update a plugin
asdf plugin update --all          # Update all plugins
asdf plugin remove nodejs         # Remove plugin + all its installs

Version Management

bash

asdf list all nodejs              # List all installable versions
asdf list all nodejs 20           # List versions matching prefix
asdf install nodejs latest        # Install latest version
asdf install nodejs 20.11.0       # Install specific version
asdf install                      # Install all versions in .tool-versions
asdf list nodejs                  # List installed versions
asdf uninstall nodejs 18.0.0      # Remove a version

Setting Versions

bash

asdf set nodejs 20.11.0           # Set version in ./.tool-versions (project)
asdf set -u nodejs 20.11.0        # Set version in ~/.tool-versions (global/user default)
asdf set -p nodejs 20.11.0        # Set in nearest parent .tool-versions
asdf set nodejs latest            # Resolve and write latest version
asdf current                      # Show active version for all tools in cwd
asdf current nodejs               # Show active version for one tool
asdf where nodejs                 # Show install path for active version
asdf which node                   # Show shim path for a command

Note: asdf set replaced the older asdf local / asdf global commands in asdf v0.15+. Both still work but asdf set is the modern API.

Environment Variable Override

bash

# Temporarily override without editing .tool-versions
ASDF_NODEJS_VERSION=18.0.0 node --version

Show full SKILL.md (221 more words)Show less

.tool-versions Format

nodejs 20.11.0
python 3.12.2
terraform 1.7.4
kubectl 1.29.2
golang 1.22.1

One tool per line, <name> <version>
Multiple versions separated by spaces (fallback chain): python 3.12.2 2.7.18
Special keywords: system (use OS-installed version), path:~/my/custom/build
Commit to version control — this is the contract for the project's tool versions

.asdfrc Configuration

Located at ~/.asdfrc:

ini

# Support .nvmrc, .ruby-version, etc. (per-plugin support required)
legacy_version_file = yes

# Keep downloaded archives (useful for slow connections)
always_keep_download = no

# Concurrency for parallel installs
concurrency = auto

# Plugin repository refresh interval in minutes
plugin_repository_last_check_duration = 60

Common Plugins for DevOps/Cloud (Jean-Jacques' stack)

Tool	Plugin add command
Node.js	`asdf plugin add nodejs`
Python	`asdf plugin add python`
Go	`asdf plugin add golang`
Terraform	`asdf plugin add terraform`
kubectl	`asdf plugin add kubectl`
Helm	`asdf plugin add helm`
gcloud CLI	`asdf plugin add gcloud`
Skaffold	`asdf plugin add skaffold`
Java	`asdf plugin add java`
Ruby	`asdf plugin add ruby`
Erlang	`asdf plugin add erlang`
Elixir	`asdf plugin add elixir`

Many plugins may require system dependencies — always check the plugin's README before installing.

Migration from Other Version Managers

Enable legacy file support in ~/.asdfrc:

ini

legacy_version_file = yes

Old file	Tool
`.nvmrc`	nodejs (via asdf-nodejs)
`.node-version`	nodejs
`.ruby-version`	ruby (via asdf-ruby)
`.python-version`	python (via asdf-python)

Troubleshooting

Shims not working / command not found

bash

asdf reshim nodejs          # Regenerate shims for a plugin
asdf reshim                 # Regenerate all shims
echo $PATH                  # Verify ~/.asdf/shims is early in PATH
type -a node                # Fish: check which binary is resolved

Version not being picked up

bash

asdf current                # See what version is resolved and from where
# Look for "No version set" warnings
# Check .tool-versions exists in project dir or a parent

Plugin install failures

Check plugin README for system dependency requirements
Ensure git is installed and accessible
For nodejs: may need gnupg for keyring verification

Data directory

Default: ~/.asdf/ — override with export ASDF_DATA_DIR=/custom/path in shell config.

Typical Project Onboarding Workflow

bash

# 1. Clone project
git clone <repo> && cd <repo>

# 2. Add plugins for each tool in .tool-versions (if not already added)
asdf plugin add nodejs
asdf plugin add python

# 3. Install all versions specified in .tool-versions
asdf install

# 4. Verify
asdf current

Reference

Full docs: https://asdf-vm.com/
Plugin list: https://github.com/asdf-vm/asdf-plugins
All commands: asdf --help or asdf <command> --help

Files

Just SKILL.md in opencode/skills/asdf of jjmartres/opencode.

Open the folder on GitHubat commit 28dc323

Compare with similar skills

Asdf next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Asdf compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Asdf this skilljjmartres/opencode	133	—	~2.1k	Automated safety check: Notes	MIT	5 mo ago
Carefulyonatangross/orchestkit	290	—	~1.2k	Automated safety check: Pass	MIT	today
Security Analyzeraiskillstore/marketplace	430	—	~1.2k	Automated safety check: Notes	None	today
Eks Best Practicesaws-samples/appmod-blueprints	115	—	~5k	Automated safety check: Pass	MIT-0	yesterday
Supercheck Infrastructure Deploymentsupercheck-io/supercheck	215	—	~1.4k	Automated safety check: Notes	AGPL-3.0	today
Cloud Devopsdavila7/claude-code-templates	32k	4 repos	~1.4k	Automated safety check: Pass	MIT	today

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Questions about Asdf

What does Asdf do?

A skill your agent uses whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager. Asdf is an agent skill from jjmartres/opencode. Use this skill whenever the user wants to install, configure, or use asdf (asdf-vm), the universal version manager.

When should I use Asdf?

Asdf fits situations like: the user wants to install; use asdf (asdf-vm); the universal version manager; any mention of asdf.

How do I install Asdf in Claude Code?

Run `npx skills add jjmartres/opencode --skill asdf -a claude-code`. Or copy the skill folder (opencode/skills/asdf in jjmartres/opencode) into .claude/skills/asdf in your project. Claude Code loads it when a task matches its description.

How do I install Asdf in Codex?

Run `npx skills add jjmartres/opencode --skill asdf -a codex`. Or copy the skill folder (opencode/skills/asdf in jjmartres/opencode) into .agents/skills/asdf in your project. Codex loads it when a task matches its description.

Can I use Asdf in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jjmartres/opencode --skill asdf -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/asdf, .gemini/skills/asdf, .github/skills/asdf and .opencode/skills/asdf in your project.

What does Asdf need to run?

Going by SKILL.md and its folder, Asdf needs the command-line tools its instructions call (asdf, git, python, apt, brew and node). Our summary lists: Python 3; Node.js. Compatibility (from SKILL.md): opencode.

Does Asdf access the network?

SKILL.md names 2 domains. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. As links in the text: asdf-vm.com. This is read from the text; nothing was executed.

Is Asdf safe to install?

Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Asdf use?

Asdf is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Asdf use?

About 2.1k tokens (SKILL.md is roughly 8.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Asdf?

Skills that share tags, products or a category with Asdf: Careful (yonatangross/orchestkit, 290 stars), Security Analyzer (aiskillstore/marketplace, 430 stars), Eks Best Practices (aws-samples/appmod-blueprints, 115 stars) and Supercheck Infrastructure Deployment (supercheck-io/supercheck, 215 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Asdf?

jjmartres (a GitHub user) maintains it in jjmartres/opencode, which has 133 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on April 20, 2026.

Source: jjmartres/opencode on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Asdf

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Compatibility

Context cost

Safety

SKILL.md

asdf Version Manager Skill

When to Use This Skill

Core Concepts

Installation

Dependencies (all platforms)

Install asdf binary (recommended: binary download)

Shell Configuration

Essential Commands

Plugin Management

Version Management

Setting Versions

Environment Variable Override

.tool-versions Format

.asdfrc Configuration

Common Plugins for DevOps/Cloud (Jean-Jacques' stack)

Migration from Other Version Managers

Troubleshooting

Shims not working / command not found

Version not being picked up

Plugin install failures

Data directory

Typical Project Onboarding Workflow

Reference

Files

Compare with similar skills

Similar skills

More from jjmartres/opencode

Related

Questions about Asdf