Agent skill

Npx CLI

Build and publish npx-executable CLI tools using Bun as the primary toolchain with npm-compatible output.

No licenceAuto-check passedDevelopment

Install Npx CLI

skills CLI

$ npx skills add jwynia/agent-skills --skill npx-cli -a claude-code

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

GitHub CLI

$ gh skill install jwynia/agent-skills npx-cli --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/jwynia/agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .claude/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .claude/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli

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 jwynia/agent-skills --skill npx-cli -a codex

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

GitHub CLI

$ gh skill install jwynia/agent-skills npx-cli --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .agents/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .agents/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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 jwynia/agent-skills --skill npx-cli -a cursor

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

GitHub CLI

$ gh skill install jwynia/agent-skills npx-cli --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .cursor/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .cursor/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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/jwynia/agent-skills.git --path skills/tech/development/tooling/npx-cli

--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 jwynia/agent-skills --skill npx-cli -a gemini-cli

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

GitHub CLI

$ gh skill install jwynia/agent-skills npx-cli --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/jwynia/agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .gemini/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .gemini/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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 jwynia/agent-skills npx-cli

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 jwynia/agent-skills --skill npx-cli -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .github/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .github/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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 jwynia/agent-skills --skill npx-cli -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 jwynia/agent-skills npx-cli --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/tech/development/tooling/npx-cli .opencode/skills/npx-cli && 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 "npx-cli" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/tech/development/tooling/npx-cli into .opencode/skills/npx-cli/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "npx-cli", 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: npx-cli
GitHub stars: 166
Token cost: ~2.4k tokens
SKILL.md length: 736 words
Files: 18 (incl. scripts)
Skills in repo: 112
Repo updated: Feb 24, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

Build and publish npx-executable CLI tools using Bun as the primary toolchain with npm-compatible output.

Works in 3 steps: Parses arguments with citty → Calls into the library/core modules → Formats output for the terminal
The user wants to create a new CLI tool
SKILL.md covers When to Use This Skill, Toolchain, Scaffolding a New CLI and Project Structure, plus 9 more sections
Runs TypeScript scripts from its folder; calls bun, node and bunx; needs NPM_CONFIG_TOKEN and NODE_AUTH_TOKEN

What it does

Npx CLI is an agent skill from jwynia/agent-skills. Build and publish npx-executable CLI tools using Bun as the primary toolchain with npm-compatible output. Use when the user wants to create a new CLI tool, set up a command-line package for npx execution, configure argument parsing and terminal output, or publish a CLI to npm. Covers scaffolding, citty arg parsing, sub-commands, terminal UX, strict TypeScript, Biome + ESLint linting, Vitest testing, Bunup bundling, and publishing workflows. Keywords: npx, cli, command-line, binary, bin, tool, bun, citty…

Its SKILL.md is about 2.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 22 other files, including scripts (for example `reference/cli-patterns.md`, `reference/esm-cjs-guide.md` and `reference/publishing-workflow.md`).

It sits in Development, covering Linting and formatting, Unit testing and Project scaffolding. It works with npm, TypeScript, Vitest and ESLint.

When your agent uses it

The user wants to create a new CLI tool
Set up a command-line package for npx execution
Configure argument parsing and terminal output
Publish a CLI to npm

Example prompts

“/npx-cli”

Requirements

Node.js
A credential in NPM_CONFIG_TOKEN
A credential in NODE_AUTH_TOKEN

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

Parses arguments with citty
Calls into the library/core modules
Formats output for the terminal

What it can do on your machine

Read from SKILL.md and the folder at commit e02ec7e. 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
Ships 1 file in scripts/ (TypeScript, from the files we listed), which the agent can run.
Shell commands in SKILL.md call:
- bun
- node
- bunx
- npm
- tsc
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use bunx and npm, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- NPM_CONFIG_TOKEN
- NODE_AUTH_TOKEN
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Npx CLI loads about 2.4k tokens when it runs. Until then it costs about 144 tokens; SKILL.md has 736 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~144
When it runs · the whole SKILL.md, loaded when a task matches: ~2.4k

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 passed

The automated check found no risky patterns in SKILL.md.

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); the scripts in this folder are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 736 words (~2,374 tokens).

“Build and publish npx-executable command-line tools using Bun as the primary runtime and toolchain, producing binaries that work for all npm/npx users (Node.js runtime).”

— opening of SKILL.md by jwynia

name: npx-cli

Outline of SKILL.md

npx CLI Tool Development (Bun-First)
When to Use This Skill
Toolchain
Scaffolding a New CLI
Project Structure
Dual (Library + CLI) — Default
CLI-Only (No Library Exports)
Architecture Pattern
Key Rules (Non-Negotiable)
Binary Configuration
Package Configuration
Code Quality
Reference Documentation
Argument Parsing with citty
Single Command
Sub-Commands
Testing Strategy
Unit Tests — Test the Logic
Integration Tests — Test the Binary
Development Workflow
Adding Sub-Commands Later
Converting a CLI-Only Package to Dual (Library + CLI)
Bun-Specific Gotchas

Read the full SKILL.md on GitHub

Files

SKILL.md and 17 other files (scripts) in skills/tech/development/tooling/npx-cli of jwynia/agent-skills.

SKILL.md
reference/cli-patterns.md
reference/esm-cjs-guide.md
reference/publishing-workflow.md
reference/strict-typescript.md
scripts/scaffold.ts
templates/biome.json
templates/bunup.config.ts
templates/eslint.config.ts
templates/gitignore
templates/package.json.hbs
templates/scripts/postbuild.ts
templates/src/cli.test.ts.hbs
templates/src/cli.ts.hbs
templates/src/index.test.ts.hbs
templates/src/index.ts.hbs
… and 2 more

Open the folder on GitHubat commit e02ec7e

Compare with similar skills

Npx CLI 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.

Npx CLI compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Npx CLI this skilljwynia/agent-skills	166	—	~2.4k	Automated safety check: Pass	None	7 mo ago
Create Saleor Packagesaleor/apps	162	—	~608	Automated safety check: Pass	Custom licence	yesterday
Typescript ToolingHoangNguyen0403/agent-skills-standard	571	—	~688	Automated safety check: Pass	MIT	yesterday
Antfuoyjt/uniapp-vue3-template	627	—	~1.3k	Automated safety check: Pass	MIT	4 mo ago
Eslint Vitest Rule Testerantfu-collective/eslint-vitest-rule-tester	142	—	~1.3k	Automated safety check: Pass	MIT	28 days ago
Implementing Lint Rulesflint-fyi/flint	312	—	~857	Automated safety check: Pass	MIT	today

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Questions about Npx CLI

What does Npx CLI do?

Build and publish npx-executable CLI tools using Bun as the primary toolchain with npm-compatible output. Npx CLI is an agent skill from jwynia/agent-skills. Build and publish npx-executable CLI tools using Bun as the primary toolchain with npm-compatible output.

When should I use Npx CLI?

Npx CLI fits situations like: the user wants to create a new CLI tool; set up a command-line package for npx execution; configure argument parsing and terminal output; publish a CLI to npm.

How do I install Npx CLI in Claude Code?

Run `npx skills add jwynia/agent-skills --skill npx-cli -a claude-code`. Or copy the skill folder (skills/tech/development/tooling/npx-cli in jwynia/agent-skills) into .claude/skills/npx-cli in your project. Claude Code loads it when a task matches its description.

How do I install Npx CLI in Codex?

Run `npx skills add jwynia/agent-skills --skill npx-cli -a codex`. Or copy the skill folder (skills/tech/development/tooling/npx-cli in jwynia/agent-skills) into .agents/skills/npx-cli in your project. Codex loads it when a task matches its description.

Can I use Npx CLI 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 jwynia/agent-skills --skill npx-cli -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/npx-cli, .gemini/skills/npx-cli, .github/skills/npx-cli and .opencode/skills/npx-cli in your project.

What does Npx CLI need to run?

Going by SKILL.md and its folder, Npx CLI needs TypeScript for the scripts in its folder, the command-line tools its instructions call (bun, node, bunx, npm and tsc) and credentials named NPM_CONFIG_TOKEN and NODE_AUTH_TOKEN. Our summary lists: Node.js; A credential in NPM_CONFIG_TOKEN; A credential in NODE_AUTH_TOKEN.

Does Npx CLI access the network?

SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Npx CLI safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Npx CLI use?

No licence was found for Npx CLI or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Npx CLI use?

About 2.4k tokens (SKILL.md is roughly 9.5k 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 Npx CLI?

Skills that share tags, products or a category with Npx CLI: Create Saleor Package (saleor/apps, 162 stars), Typescript Tooling (HoangNguyen0403/agent-skills-standard, 571 stars), Antfu (oyjt/uniapp-vue3-template, 627 stars) and Eslint Vitest Rule Tester (antfu-collective/eslint-vitest-rule-tester, 142 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Npx CLI?

jwynia (a GitHub user) maintains it in jwynia/agent-skills, which has 166 GitHub stars. The repository holds 112 skills in this directory. The repository was last updated on February 24, 2026.

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

Npx CLI

Install Npx CLI

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Create Saleor Package

Typescript Tooling

Antfu

Eslint Vitest Rule Tester

Implementing Lint Rules

Vite Plus Conventions

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Questions about Npx CLI

Install Npx CLI

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from jwynia/agent-skills

Related

Questions about Npx CLI