Sync Simplegraphic
atty303/pob-web
Synchronize pob-web with PathOfBuilding-SimpleGraphic only when the user explicitly invokes $sync-simplegraphic.
Provides xmath API reference and in-place math optimization patterns for Defold.
Install Xmath Usage
$ npx skills add selimanac/defold-astar --skill xmath-usage -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install selimanac/defold-astar xmath-usage --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/xmath-usage .claude/skills/xmath-usage && rm -rf skills-srcUse ~/.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/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .claude/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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 install https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usageType 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.
$ npx skills add selimanac/defold-astar --skill xmath-usage -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install selimanac/defold-astar xmath-usage --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/xmath-usage .agents/skills/xmath-usage && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .agents/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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.
$ npx skills add selimanac/defold-astar --skill xmath-usage -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install selimanac/defold-astar xmath-usage --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/xmath-usage .cursor/skills/xmath-usage && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .cursor/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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 https://github.com/selimanac/defold-astar.git --path .agents/skills/xmath-usage--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add selimanac/defold-astar --skill xmath-usage -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install selimanac/defold-astar xmath-usage --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/xmath-usage .gemini/skills/xmath-usage && rm -rf skills-srcUse ~/.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/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .gemini/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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.
$ gh skill install selimanac/defold-astar xmath-usageInstalls 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).
$ npx skills add selimanac/defold-astar --skill xmath-usage -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/xmath-usage .github/skills/xmath-usage && rm -rf skills-srcUse ~/.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/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .github/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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.
$ npx skills add selimanac/defold-astar --skill xmath-usage -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install selimanac/defold-astar xmath-usage --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/selimanac/defold-astar.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/xmath-usage .opencode/skills/xmath-usage && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "xmath-usage" agent skill from https://github.com/selimanac/defold-astar/tree/master/.agents/skills/xmath-usage into .opencode/skills/xmath-usage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xmath-usage", 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
xmath-usage- GitHub stars
- 111
- Token cost
- ~1.5k tokens
- SKILL.md length
- 501 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- None found
At a glance
Provides xmath API reference and in-place math optimization patterns for Defold.
- Works in 5 steps: Pre-allocate scratch variables at module… → The output variable is always the first… → Functions return nothing — you cannot… → …
- Writing performance-critical math code
- SKILL.md covers Prerequisite: Verify xmath…, Core Concept: In-Place…, Key Rules and Optimization Pattern, plus 1 more section
- Reaches github.com
What it does
Xmath Usage is an agent skill from selimanac/defold-astar. Provides xmath API reference and in-place math optimization patterns for Defold. Use when writing performance-critical math code, optimizing vector/quaternion/matrix operations, or when the user mentions xmath, zero-allocation math, or reducing Lua GC pressure.
Its SKILL.md is about 1.5k 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. It works with Lua. The repository describes itself as: Pathfinder and A solver (astar or a-star) native extension for Defold Engine build on MicroPather.
When your agent uses it
- Writing performance-critical math code
- Optimizing vector/quaternion/matrix operations
- The user mentions xmath
- Zero-allocation math
Example prompts
- “Use the xmath-usage skill to provide xmath API reference and in-place math optimization patterns for Defold”
- “/xmath-usage”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Pre-allocate scratch variables at module scope or in init() — never inside update() or on_message().
- The output variable is always the first argument — this is the fundamental calling convention difference from vmath.
- Functions return nothing — you cannot chain calls. Use a scratch variable at each step.
- Use vmath to create initial objects — vmath.vector3(), vmath.vector4(), vmath.quat(), vmath.matrix4() to allocate scratch buffers, then…
- Type polymorphism — functions like xmath.lerp work for vector3, vector4, and quaternion based on the output argument type.
What it can do on your machine
Read from SKILL.md and the folder at commit 1471c54. 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 lua).
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
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
Xmath Usage loads about 1.5k tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 501 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 501 words (~1,509 tokens).
“Before applying any guidance from this skill, you MUST confirm that the project uses xmath. Check the game.project file for a dependency URL containing thejustinwalsh/defold-xmath (e.g. dependencies#N = https://github.com/thejustinwalsh/defold-xmath/archive/...). Alternatively, check for the presence of xmath/ in the .deps/ directory.”
- name
- xmath-usage
Files
Just SKILL.md in .agents/skills/xmath-usage of selimanac/defold-astar.
Open the folder on GitHubat commit 1471c54
Compare with similar skills
Xmath Usage 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Xmath Usage this skillselimanac/defold-astar | 111 | — | ~1.5k | Automated safety check: Pass | None | |
| Sync Simplegraphicatty303/pob-web | 103 | — | ~1.4k | Automated safety check: Pass | MIT | |
| Dota2 Game LogicXavierCHN/x-template | 216 | — | ~2.7k | Automated safety check: Pass | MIT | |
| Love2d Coregamedev-skills/awesome-gamedev-agent-skills | 1.3k | — | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| Cpp Compiler FlagsSerial-Studio/Serial-Studio | 7.2k | — | ~2.1k | Automated safety check: Pass | Custom licence | |
| Lua Ecozhaojh329/lua-eco | 103 | — | ~1.7k | Automated safety check: Pass | MIT |
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Questions about Xmath Usage
What does Xmath Usage do?
Provides xmath API reference and in-place math optimization patterns for Defold. Xmath Usage is an agent skill from selimanac/defold-astar. Provides xmath API reference and in-place math optimization patterns for Defold.
When should I use Xmath Usage?
Xmath Usage fits situations like: writing performance-critical math code; optimizing vector/quaternion/matrix operations; the user mentions xmath; zero-allocation math.
How do I install Xmath Usage in Claude Code?
Run `npx skills add selimanac/defold-astar --skill xmath-usage -a claude-code`. Or copy the skill folder (.agents/skills/xmath-usage in selimanac/defold-astar) into .claude/skills/xmath-usage in your project. Claude Code loads it when a task matches its description.
How do I install Xmath Usage in Codex?
Run `npx skills add selimanac/defold-astar --skill xmath-usage -a codex`. Or copy the skill folder (.agents/skills/xmath-usage in selimanac/defold-astar) into .agents/skills/xmath-usage in your project. Codex loads it when a task matches its description.
Can I use Xmath Usage 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 selimanac/defold-astar --skill xmath-usage -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/xmath-usage, .gemini/skills/xmath-usage, .github/skills/xmath-usage and .opencode/skills/xmath-usage in your project.
What does Xmath Usage need to run?
SKILL.md names no scripts, command-line tools or credentials: Xmath Usage is instructions for the agent only.
Does Xmath Usage access the network?
SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Xmath Usage 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 Xmath Usage use?
No licence was found for Xmath Usage or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Xmath Usage use?
About 1.5k tokens (SKILL.md is roughly 6k 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 Xmath Usage?
Skills that share tags, products or a category with Xmath Usage: Sync Simplegraphic (atty303/pob-web, 103 stars), Dota2 Game Logic (XavierCHN/x-template, 216 stars), Love2d Core (gamedev-skills/awesome-gamedev-agent-skills, 1.3k stars) and Cpp Compiler Flags (Serial-Studio/Serial-Studio, 7.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Xmath Usage?
selimanac (a GitHub user) maintains it in selimanac/defold-astar, which has 111 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on April 18, 2026.
Source: selimanac/defold-astar on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.