Image to Three.js Model
img2threejs/img2threejs
Rebuilds the object in a reference image as a procedural, animation-ready Three.js model written entirely in code, using staged sculpting with quality checks.
FRB vs MonoGameGum source-sharing model — same .cs files, separate .csproj, and where the two diverge.
Install Gum Shared Source
$ npx skills add vchelaru/FlatRedBall --skill gum-shared-source -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vchelaru/FlatRedBall gum-shared-source --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/vchelaru/FlatRedBall.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/gum-shared-source .claude/skills/gum-shared-source && 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 "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .claude/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-sourceType 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 vchelaru/FlatRedBall --skill gum-shared-source -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vchelaru/FlatRedBall gum-shared-source --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/gum-shared-source .agents/skills/gum-shared-source && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .agents/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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 vchelaru/FlatRedBall --skill gum-shared-source -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vchelaru/FlatRedBall gum-shared-source --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/gum-shared-source .cursor/skills/gum-shared-source && 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 "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .cursor/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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/vchelaru/FlatRedBall.git --path .claude/skills/gum-shared-source--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 vchelaru/FlatRedBall --skill gum-shared-source -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vchelaru/FlatRedBall gum-shared-source --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/gum-shared-source .gemini/skills/gum-shared-source && 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 "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .gemini/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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 vchelaru/FlatRedBall gum-shared-sourceInstalls 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 vchelaru/FlatRedBall --skill gum-shared-source -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/gum-shared-source .github/skills/gum-shared-source && 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 "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .github/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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 vchelaru/FlatRedBall --skill gum-shared-source -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vchelaru/FlatRedBall gum-shared-source --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/gum-shared-source .opencode/skills/gum-shared-source && 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 "gum-shared-source" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/gum-shared-source into .opencode/skills/gum-shared-source/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gum-shared-source", 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
gum-shared-source- GitHub stars
- 578
- Token cost
- ~449 tokens
- SKILL.md length
- 198 words
- Files
- 1
- Skills in repo
- 32
- Repo updated
- First seen
- Licence
- MIT
At a glance
FRB vs MonoGameGum source-sharing model — same .cs files, separate .csproj, and where the two diverge.
- Game Development work in your project
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Gum Shared Source is an agent skill from vchelaru/FlatRedBall. FRB vs MonoGameGum source-sharing model — same .cs files, separate .csproj, and where the two diverge. Triggers: Compile Include Gum, GumRuntime, MonoGameGum, Cursor, shared source file missing on FRB side.
Its SKILL.md is about 450 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: Cross-platform 2D game engine focused on ultimate productivity built in .NET. The licence is MIT.
When your agent uses it
- Game Development work in your project
Example prompts
- “/gum-shared-source”
What it can do on your machine
Read from SKILL.md and the folder at commit f30172a. 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.
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
Gum Shared Source loads about 449 tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 198 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
The full file from vchelaru/FlatRedBall at commit f30172a, republished under its MIT licence (© vchelaru). 198 words, ~449 tokens.
Download SKILL.mdSave it as
.claude/skills/gum-shared-source/SKILL.md (or your agent's skills folder).- name
- gum-shared-source
- description
- FRB vs MonoGameGum source-sharing model — same .cs files, separate .csproj, and where the two diverge. Triggers: Compile Include Gum, GumRuntime, MonoGameGum, Cursor, shared source file missing on FRB side.
Gum Shared Source (FRB vs MonoGameGum)
MonoGameGum (in the sibling [[gum-integration]] repo) is the primary, more widely-used consumer of Gum's runtime. FRB reuses the bulk of that same source (roughly 80-90%) rather than forking it, but the two have separate .csproj files — there is no shared project file. FRB's projects pull individual Gum source files in directly via <Compile Include> with a relative path into the sibling repo (e.g. GumPlugin.csproj includes ..\..\..\..\..\Gum\GumRuntime\BbCodeParser.cs), alongside plain <ProjectReference>s to fully-shared sub-libraries like GumCommon/GumCore.
Gotcha: a new/renamed file in Gum's source does not automatically appear on the FRB side. Since FRB's .csproj lists individual files rather than referencing the folder, adding a file in MonoGameGum/GumRuntime requires also adding a matching <Compile Include> line in the FRB-side .csproj (GumPlugin.csproj, FlatRedBall.Forms.*.csproj, etc.) or it silently won't compile in.
Gotcha: not everything is shared — some types are FRB's own, same-named or not. The flagship example is Cursor: MonoGameGum has its own MonoGameGum.Input.Cursor, but FRB doesn't use it — FRB has its own, older FlatRedBall.Gui.Cursor (Engines\FlatRedBallXNA\FlatRedBall\Gui\Cursor.cs), bridged to Gum via extension methods (CursorExtensions.cs, e.g. XRespectingGumZoomAndBounds) instead of sharing the type. Before assuming a Gum API applies on the FRB side, check which repo/namespace it actually lives in.
© vchelaru, 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 .claude/skills/gum-shared-source of vchelaru/FlatRedBall.
Open the folder on GitHubat commit f30172a
Compare with similar skills
Gum Shared Source 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 |
|---|---|---|---|---|---|---|
| Gum Shared Source this skillvchelaru/FlatRedBall | 578 | — | ~449 | Automated safety check: Pass | MIT | |
| Image to Three.js Modelimg2threejs/img2threejs | 18k | 1 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 | |
| Web CloneJane-xiaoer/claude-skill-web-clone | 1k | 2 repos | ~2.7k | Automated safety check: Pass | MIT | |
| Threejs Game Directormajidmanzarpour/threejs-game-skills | 2.4k | — | ~2.2k | Automated safety check: Pass | MIT | |
| Game Asset Generatorhtdt/godogen | 7.1k | — | ~2.8k | Automated safety check: Pass | MIT | |
| Threejs Gameplay Systemsvalkor-ai/loom | 1.2k | 1 repos | ~1.4k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Gum Shared Source
What does Gum Shared Source do?
FRB vs MonoGameGum source-sharing model — same .cs files, separate .csproj, and where the two diverge. Gum Shared Source is an agent skill from vchelaru/FlatRedBall.csproj, and where the two diverge.
When should I use Gum Shared Source?
Gum Shared Source fits situations like: game Development work in your project.
How do I install Gum Shared Source in Claude Code?
Run `npx skills add vchelaru/FlatRedBall --skill gum-shared-source -a claude-code`. Or copy the skill folder (.claude/skills/gum-shared-source in vchelaru/FlatRedBall) into .claude/skills/gum-shared-source in your project. Claude Code loads it when a task matches its description.
How do I install Gum Shared Source in Codex?
Run `npx skills add vchelaru/FlatRedBall --skill gum-shared-source -a codex`. Or copy the skill folder (.claude/skills/gum-shared-source in vchelaru/FlatRedBall) into .agents/skills/gum-shared-source in your project. Codex loads it when a task matches its description.
Can I use Gum Shared Source 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 vchelaru/FlatRedBall --skill gum-shared-source -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gum-shared-source, .gemini/skills/gum-shared-source, .github/skills/gum-shared-source and .opencode/skills/gum-shared-source in your project.
What does Gum Shared Source need to run?
SKILL.md names no scripts, command-line tools or credentials: Gum Shared Source is instructions for the agent only.
Does Gum Shared Source 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 Gum Shared Source 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 Gum Shared Source use?
Gum Shared Source 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 Gum Shared Source use?
About 449 tokens (SKILL.md is roughly 1.8k 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 Gum Shared Source?
Skills that share tags, products or a category with Gum Shared Source: 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, 2.4k 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 Gum Shared Source?
vchelaru (a GitHub user) maintains it in vchelaru/FlatRedBall, which has 578 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on October 2, 2026.
Source: vchelaru/FlatRedBall on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.