Agent skill

Uloop Hello World

by hatayama in hatayama/unity-cli-loop

Sample uloop hello-world tool. An agent skill from hatayama/unity-cli-loop.

MITAuto-check passedGame Development

Install Uloop Hello World

skills CLI
$ npx skills add hatayama/unity-cli-loop --skill uloop-hello-world -a claude-code

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

GitHub CLI
$ gh skill install hatayama/unity-cli-loop uloop-hello-world --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/hatayama/unity-cli-loop.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/uloop-hello-world .claude/skills/uloop-hello-world && 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/

Facts

Skill name
uloop-hello-world
GitHub stars
577
Token cost
~321 tokens
SKILL.md length
79 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
MIT

At a glance

Sample uloop hello-world tool. An agent skill from hatayama/unity-cli-loop.

  • Verify custom tool wiring
  • SKILL.md covers Usage, Parameters, Examples and Output, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Inspect a minimal tool implementation example

What it does

Uloop Hello World is an agent skill from hatayama/unity-cli-loop. Sample uloop hello-world tool. Use to verify custom tool wiring or inspect a minimal tool implementation example.

Its SKILL.md is about 320 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Game Development. The repository describes itself as: Let AI Drive Unity, from Editor to Play Mode. The licence is MIT.

When your agent uses it

  • Verify custom tool wiring
  • Inspect a minimal tool implementation example

Example prompts

  • “/uloop-hello-world”

What it can do on your machine

Read from SKILL.md and the folder at commit b05bd95. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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.

Context cost

Uloop Hello World loads about 321 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 79 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~33
When it runs · the whole SKILL.md, loaded when a task matches
~321

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from hatayama/unity-cli-loop at commit b05bd95, republished under its MIT licence (© hatayama). 79 words, ~321 tokens.

Download SKILL.mdSave it as .claude/skills/uloop-hello-world/SKILL.md (or your agent's skills folder).
name
uloop-hello-world
description
Sample uloop hello-world tool. Use to verify custom tool wiring or inspect a minimal tool implementation example.

uloop hello-world

Personalized hello world tool with multi-language support.

Usage

bash
uloop hello-world [options]

Parameters

ParameterTypeDefaultDescription
--namestringWorldName to greet
--languagestringenglishLanguage for greeting: english, japanese, spanish, french
--no-include-timestampflag-Exclude timestamp from response

Examples

bash
# Default greeting
uloop hello-world

# Greet with custom name
uloop hello-world --name "Alice"

# Japanese greeting
uloop hello-world --name "太郎" --language japanese

# Spanish greeting without timestamp
uloop hello-world --name "Carlos" --language spanish --no-include-timestamp

Output

Returns JSON with:

  • Message: The greeting message
  • Language: Language used for greeting
  • Timestamp: Current timestamp (if enabled)

Notes

This is a sample custom tool demonstrating:

  • Type-safe parameter handling with Schema
  • Enum parameters for language selection
  • Value-less flag parameters
  • Multi-language support

© hatayama, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/uloop-hello-world of hatayama/unity-cli-loop.

Open the folder on GitHubat commit b05bd95

Compare with similar skills

Uloop Hello World 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.

Uloop Hello World compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Uloop Hello World this skillhatayama/unity-cli-loop577—~321Automated safety check: PassMIT
Image to Three.js Modelimg2threejs/img2threejs18k1 repos~8.2kAutomated safety check: PassApache-2.0
Web CloneJane-xiaoer/claude-skill-web-clone1k1 repos~2.7kAutomated safety check: PassMIT
Threejs Game Directormajidmanzarpour/threejs-game-skills2.5k—~2.2kAutomated safety check: PassMIT
Game Asset Generatorhtdt/godogen7.1k—~2.8kAutomated safety check: PassMIT
Threejs Gameplay Systemsvalkor-ai/loom1.2k1 repos~1.4kAutomated safety check: PassApache-2.0

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Questions about Uloop Hello World

What does Uloop Hello World do?

Sample uloop hello-world tool. An agent skill from hatayama/unity-cli-loop. Uloop Hello World is an agent skill from hatayama/unity-cli-loop. Sample uloop hello-world tool.

When should I use Uloop Hello World?

Uloop Hello World fits situations like: verify custom tool wiring; inspect a minimal tool implementation example.

How do I install Uloop Hello World in Claude Code?

Run `npx skills add hatayama/unity-cli-loop --skill uloop-hello-world -a claude-code`. Or copy the skill folder (.agents/skills/uloop-hello-world in hatayama/unity-cli-loop) into .claude/skills/uloop-hello-world in your project. Claude Code loads it when a task matches its description.

How do I install Uloop Hello World in Codex?

Run `npx skills add hatayama/unity-cli-loop --skill uloop-hello-world -a codex`. Or copy the skill folder (.agents/skills/uloop-hello-world in hatayama/unity-cli-loop) into .agents/skills/uloop-hello-world in your project. Codex loads it when a task matches its description.

Can I use Uloop Hello World 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 hatayama/unity-cli-loop --skill uloop-hello-world -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/uloop-hello-world, .gemini/skills/uloop-hello-world, .github/skills/uloop-hello-world and .opencode/skills/uloop-hello-world in your project.

What does Uloop Hello World need to run?

SKILL.md names no scripts, command-line tools or credentials: Uloop Hello World is instructions for the agent only.

Does Uloop Hello World access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Uloop Hello World 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. Review the folder before installing.

What licence does Uloop Hello World use?

Uloop Hello World is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Uloop Hello World use?

About 321 tokens (SKILL.md is roughly 1.3k 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 Uloop Hello World?

Skills that share tags, products or a category with Uloop Hello World: Image to Three.js Model (img2threejs/img2threejs, 18k stars), Web Clone (Jane-xiaoer/claude-skill-web-clone, 1k stars), Threejs Game Director (majidmanzarpour/threejs-game-skills, 2.5k stars) and Game Asset Generator (htdt/godogen, 7.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Uloop Hello World?

hatayama (a GitHub user) maintains it in hatayama/unity-cli-loop, which has 577 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 9, 2026.

Source: hatayama/unity-cli-loop on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.