Agent skill

Uloop Raycast

by Haruma-K in Haruma-K/UnityScreenNavigator

Raycast from Camera.main through a Game View coordinate. An agent skill from Haruma-K/UnityScreenNavigator.

MITAuto-check passedGame Development

Install Uloop Raycast

skills CLI
$ npx skills add Haruma-K/UnityScreenNavigator --skill uloop-raycast -a claude-code

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

GitHub CLI
$ gh skill install Haruma-K/UnityScreenNavigator uloop-raycast --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/Haruma-K/UnityScreenNavigator.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/uloop-raycast .claude/skills/uloop-raycast && 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-raycast
GitHub stars
1.1k
Token cost
~637 tokens
SKILL.md length
204 words
Files
1
Skills in repo
2
Repo updated
First seen
Licence
MIT

At a glance

Raycast from Camera.main through a Game View coordinate. An agent skill from Haruma-K/UnityScreenNavigator.

  • You need to check what a screenshot coordinate would hit in 3D physics before clicking
  • SKILL.md covers Usage, Parameters, Coordinate System and Examples, plus 2 more sections
  • Calls npx
  • Long-pressing with simulate-mouse-input

What it does

Uloop Raycast is an agent skill from Haruma-K/UnityScreenNavigator. Raycast from Camera.main through a Game View coordinate. Use when you need to check what a screenshot coordinate would hit in 3D physics before clicking or long-pressing with simulate-mouse-input.

Its SKILL.md is about 640 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: Library for screen transitions, transition animations, transition history stacking, and screen lifecycle management in Unity's uGUI. The licence is MIT.

When your agent uses it

  • You need to check what a screenshot coordinate would hit in 3D physics before clicking
  • Long-pressing with simulate-mouse-input

Example prompts

  • “/uloop-raycast”

Requirements

  • Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit c7c0c36. 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:

    • npx

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

  • Network

    No URLs in SKILL.md. Its commands use npx, 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 no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Uloop Raycast loads about 637 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 204 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~53
When it runs · the whole SKILL.md, loaded when a task matches
~637

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 Haruma-K/UnityScreenNavigator at commit c7c0c36, republished under its MIT licence (© Haruma-K). 204 words, ~637 tokens.

Download SKILL.mdSave it as .claude/skills/uloop-raycast/SKILL.md (or your agent's skills folder).
name
uloop-raycast
description
Raycast from Camera.main through a Game View coordinate. Use when you need to check what a screenshot coordinate would hit in 3D physics before clicking or long-pressing with simulate-mouse-input.

npx --yes uloop-cli@2.2.0 raycast

Check what a top-left Game View coordinate hits in 3D physics.

Usage

bash
npx --yes uloop-cli@2.2.0 raycast --x <x> --y <y> [--layer-mask <mask>] [--max-distance <distance>]

Parameters

ParameterTypeDefaultDescription
--xnumber0Target X position in Game View pixels (origin: top-left). Use AnnotatedElements[].SimX, RaycastGridPoints[].InputX, or raw image pixels converted with ScreenshotToInputFormula.
--ynumber0Target Y position in Game View pixels (origin: top-left). Use AnnotatedElements[].SimY, RaycastGridPoints[].InputY, or raw image pixels converted with ScreenshotToInputFormula.
--layer-masknumberUnity default raycast layersPhysics layer mask used by the raycast.
--max-distancenumber1000Maximum raycast distance in world units.

Coordinate System

  • --x / --y use the same top-left Game View input coordinates as simulate-mouse-input.
  • Raw image pixels from npx --yes uloop-cli@2.2.0 screenshot --capture-mode rendering must be converted with ScreenshotToInputFormula.
  • AnnotatedElements[].SimX/SimY and RaycastGridPoints[].InputX/InputY can be passed directly to this tool.
  • Do not flip Y in the caller. The tool converts internally:
text
unity_x = input_x
unity_y = gameViewHeight - input_y

Examples

bash
# Check what is under a screenshot coordinate
npx --yes uloop-cli@2.2.0 raycast --x 960 --y 540

# Check only specific layers
npx --yes uloop-cli@2.2.0 raycast --x 960 --y 540 --layer-mask 1

Output

Returns JSON with:

  • Success: Whether the command completed
  • Message: Status message
  • Hit: Whether physics hit anything
  • HitGameObjectName / HitGameObjectPath: Hit object identity when Hit is true
  • HitLayer / HitLayerName: Hit object layer when Hit is true
  • Distance, HitPointX/Y/Z, HitNormalX/Y/Z: Hit details when Hit is true
  • InputCoordinateSystem, UnityCoordinateSystem, GameViewWidth/Height, InputPositionX/Y, InjectedUnityPositionX/Y, CoordinateConversionFormula: Coordinate conversion details

Notes

  • Requires an active Camera.main.
  • Uses Unity Physics raycasts, not UI EventSystem raycasts.

© Haruma-K, 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 .codex/skills/uloop-raycast of Haruma-K/UnityScreenNavigator.

Open the folder on GitHubat commit c7c0c36

Compare with similar skills

Uloop Raycast 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 Raycast compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Uloop Raycast this skillHaruma-K/UnityScreenNavigator1.1k—~637Automated 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 Raycast

What does Uloop Raycast do?

Raycast from Camera.main through a Game View coordinate. An agent skill from Haruma-K/UnityScreenNavigator. Uloop Raycast is an agent skill from Haruma-K/UnityScreenNavigator.main through a Game View coordinate.

When should I use Uloop Raycast?

Uloop Raycast fits situations like: you need to check what a screenshot coordinate would hit in 3D physics before clicking; long-pressing with simulate-mouse-input.

How do I install Uloop Raycast in Claude Code?

Run `npx skills add Haruma-K/UnityScreenNavigator --skill uloop-raycast -a claude-code`. Or copy the skill folder (.codex/skills/uloop-raycast in Haruma-K/UnityScreenNavigator) into .claude/skills/uloop-raycast in your project. Claude Code loads it when a task matches its description.

How do I install Uloop Raycast in Codex?

Run `npx skills add Haruma-K/UnityScreenNavigator --skill uloop-raycast -a codex`. Or copy the skill folder (.codex/skills/uloop-raycast in Haruma-K/UnityScreenNavigator) into .agents/skills/uloop-raycast in your project. Codex loads it when a task matches its description.

Can I use Uloop Raycast 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 Haruma-K/UnityScreenNavigator --skill uloop-raycast -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-raycast, .gemini/skills/uloop-raycast, .github/skills/uloop-raycast and .opencode/skills/uloop-raycast in your project.

What does Uloop Raycast need to run?

Going by SKILL.md and its folder, Uloop Raycast needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Uloop Raycast access the network?

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

Is Uloop Raycast 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 Raycast use?

Uloop Raycast 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 Raycast use?

About 637 tokens (SKILL.md is roughly 2.5k 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 Uloop Raycast?

Skills that share tags, products or a category with Uloop Raycast: 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 Raycast?

Haruma-K (a GitHub user) maintains it in Haruma-K/UnityScreenNavigator, which has 1,124 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on August 18, 2026.

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