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What "Link Game to FRB Source" actually swaps in a game project's references, vs.
Install Frb Source Linking
$ npx skills add vchelaru/FlatRedBall --skill frb-source-linking -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vchelaru/FlatRedBall frb-source-linking --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/frb-source-linking .claude/skills/frb-source-linking && 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 "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .claude/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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/frb-source-linkingType 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 frb-source-linking -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vchelaru/FlatRedBall frb-source-linking --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/frb-source-linking .agents/skills/frb-source-linking && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .agents/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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 frb-source-linking -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vchelaru/FlatRedBall frb-source-linking --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/frb-source-linking .cursor/skills/frb-source-linking && 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 "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .cursor/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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/frb-source-linking--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 frb-source-linking -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vchelaru/FlatRedBall frb-source-linking --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/frb-source-linking .gemini/skills/frb-source-linking && 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 "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .gemini/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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 frb-source-linkingInstalls 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 frb-source-linking -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/frb-source-linking .github/skills/frb-source-linking && 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 "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .github/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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 frb-source-linking -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 frb-source-linking --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/frb-source-linking .opencode/skills/frb-source-linking && 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 "frb-source-linking" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/frb-source-linking into .opencode/skills/frb-source-linking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frb-source-linking", 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
frb-source-linking- GitHub stars
- 578
- Token cost
- ~692 tokens
- SKILL.md length
- 272 words
- Files
- 1
- Skills in repo
- 32
- Repo updated
- First seen
- Licence
- MIT
At a glance
What "Link Game to FRB Source" actually swaps in a game project's references, vs.
- Game Development work in your project
- SKILL.md covers Two different things — don't…, What linking actually does and Unlinked (default) projects…
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Frb Source Linking is an agent skill from vchelaru/FlatRedBall. What "Link Game to FRB Source" actually swaps in a game project's references, vs. the plain checker. Triggers: IsFrbSourceLinked, AddSourceManager, FrbSourcePlugin, GumCore.DesktopGlNet6.dll, stale prebuilt Gum/FRB binaries, Libraries\DesktopGl.
Its SKILL.md is about 690 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
- “Link Game to FRB Source”
- “/frb-source-linking”
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
Frb Source Linking loads about 692 tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 272 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). 272 words, ~692 tokens.
Download SKILL.mdSave it as
.claude/skills/frb-source-linking/SKILL.md (or your agent's skills folder).- name
- frb-source-linking
- description
- What "Link Game to FRB Source" actually swaps in a game project's references, vs. the plain checker. Triggers: IsFrbSourceLinked, AddSourceManager, FrbSourcePlugin, GumCore.DesktopGlNet6.dll, stale prebuilt Gum/FRB binaries, Libraries\DesktopGl.
Linking a Game Project to FRB Source
Two different things — don't conflate them
VisualStudioProject.IsFrbSourceLinked()(Glue/VSHelpers/Projects/VisualStudioProject.cs) is only a checker: true iff the project has a<ProjectReference>toFlatRedBallDesktopGLNet6.csproj. Reading only this tells you nothing about what else linking touches — it's easy to wrongly conclude linking only affects the core FRB engine reference.- The actual link action is
AddSourceManager(FRBDK/Glue/OfficialPlugins/FrbSourcePlugin/Managers/AddSourceManager.cs), and it's much broader.
What linking actually does
For the target platform (DesktopGlNet6/DesktopFNA/Web/AndroidNet8/IosNet8 — see the matching lists in AddSourceManager.cs), it removes the platform's prebuilt DLL/NuGet references (RemoveDllReference/RemoveNugetReference — GumCore.DesktopGlNet6, SkiaInGum, FlatRedBall.GumCore.DesktopGlNet6, etc.) and replaces them with real <ProjectReference>s into both FRB's engine projects (FrbOrGum.Frb) and Gum's own (FrbOrGum.Gum, e.g. GumCore\GumCoreXnaPc\GumCore.DesktopGlNet6\GumCore.DesktopGlNet6.csproj).
So linking source does fix "project's GumCore.<platform>.dll is stale relative to a Gum source change" — afterward the project builds RenderingLibrary (and everything else GumCore pulls in) live from the sibling Gum checkout instead of a copied binary.
Landmine: don't answer "does linking source fix a stale-Gum-binary compile error" by reading IsFrbSourceLinked() alone — it's the symptom check, not the fix mechanism. Read AddSourceManager.cs's reference-swap lists instead.
Unlinked (default) projects still ship prebuilt binaries
A project that's never been linked to source — the common case, every Glue-generated sample/new project — references Gum via a committed, prebuilt Libraries\<Platform>\Debug\GumCore.<Platform>.dll, copied in at project-creation time. Nothing in Glue refreshes it afterward (no CopyLibraries-equivalent exists). A Gum-side runtime addition (new type/member) is invisible to an unlinked project until either (a) it's linked to source, or (b) its Libraries\...\GumCore.*.dll is manually replaced with a fresh build. This includes the repo's own bundled sample/test projects (Samples/Beefball, Tests/TestProjectDesktopNet6, etc.) — their Libraries\DesktopGl\... DLLs are just as stale as a user's unlinked project unless explicitly refreshed.
© 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/frb-source-linking of vchelaru/FlatRedBall.
Open the folder on GitHubat commit f30172a
Compare with similar skills
Frb Source Linking 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 |
|---|---|---|---|---|---|---|
| Frb Source Linking this skillvchelaru/FlatRedBall | 578 | — | ~692 | 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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Related
Categories
Questions about Frb Source Linking
What does Frb Source Linking do?
What "Link Game to FRB Source" actually swaps in a game project's references, vs. Frb Source Linking is an agent skill from vchelaru/FlatRedBall. What "Link Game to FRB Source" actually swaps in a game project's references, vs.
When should I use Frb Source Linking?
Frb Source Linking fits situations like: game Development work in your project.
How do I install Frb Source Linking in Claude Code?
Run `npx skills add vchelaru/FlatRedBall --skill frb-source-linking -a claude-code`. Or copy the skill folder (.claude/skills/frb-source-linking in vchelaru/FlatRedBall) into .claude/skills/frb-source-linking in your project. Claude Code loads it when a task matches its description.
How do I install Frb Source Linking in Codex?
Run `npx skills add vchelaru/FlatRedBall --skill frb-source-linking -a codex`. Or copy the skill folder (.claude/skills/frb-source-linking in vchelaru/FlatRedBall) into .agents/skills/frb-source-linking in your project. Codex loads it when a task matches its description.
Can I use Frb Source Linking 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 frb-source-linking -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/frb-source-linking, .gemini/skills/frb-source-linking, .github/skills/frb-source-linking and .opencode/skills/frb-source-linking in your project.
What does Frb Source Linking need to run?
SKILL.md names no scripts, command-line tools or credentials: Frb Source Linking is instructions for the agent only.
Does Frb Source Linking 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 Frb Source Linking 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 Frb Source Linking use?
Frb Source Linking 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 Frb Source Linking use?
About 692 tokens (SKILL.md is roughly 2.8k 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 Frb Source Linking?
Skills that share tags, products or a category with Frb Source Linking: 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 Frb Source Linking?
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.