Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add vchelaru/FlatRedBall2 --skill gum-integrationgit clone --depth 1 https://github.com/vchelaru/FlatRedBall2Wrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vchelaru/flatredball2/gum-integration)<a href="https://agentmods.dev/skills/vchelaru/flatredball2/gum-integration"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/gum-integration/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vchelaru/flatredball2/gum-integration"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/gum-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 184 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00084 | $0.06534 |
| Opus 5.5 | $0.00034 | $0.02614 |
| Sonnet 5.5 | $0.00017 | $0.01307 |
| Haiku 4.5 | $0.00008 | $0.00653 |
Grade A, and why
gum-integration scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 17d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 405 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gum Integration in FlatRedBall2
UI composition is a human task — AI should scaffold named controls in a flat list and let the human compose the layout in the Gum Tool. Do not try to hand-author a polished visual hierarchy in code.
Gum is FlatRedBall2's UI system, backed by the Gum.KNI NuGet package. It is automatically initialized by FlatRedBallService.Initialize — no setup required. Gum also bundles Gum.Shapes (dashed strokes, gradients, drop shadows) and can render in world space, not only screen-space UI — so it's the home for advanced shape visuals that FRB's AARect/Circle/Polygon don't provide (see shapes).
Three Gum Usage Modes
Choose the mode that matches the project setup (see gumcli skill for how to create the project):
| Mode | Description | When to use |
|---|---|---|
| Code-only | No .gumx file. All controls created in C# with new Button() etc. |
Prototypes, no Gum editor needed |
| Project + dynamic access | .gumx loaded; retrieve named elements at runtime via GetFrameworkElementByName<T>() |
Editor integration, no codegen |
| Project + codegen | .gumx loaded + gumcli generates strongly-typed C# classes; instantiate and use typed properties directly |
Best DX; recommended for new projects |
Two Levels of Gum API
Forms Controls — interactive UI (Gum.Forms.Controls)
High-level controls with built-in click, hover, focus, and Tab/accessibility keyboard navigation:
| Control | Use for |
|---|---|
Button |
Clickable buttons |
Label |
Display-only text |
TextBox |
Text input |
CheckBox |
Toggle on/off |
StackPanel |
Vertical/horizontal layout container |
Panel |
Free-layout container |
Use Forms controls for menus, buttons, and any interactive element. Label is also the right choice for simple score/status text.
Visual Types — non-interactive rendering (Gum.GueDeriving)
Raw visual objects with no built-in input handling. Use these for non-interactive HUD elements — health bars, icons, solid-color shapes — when no Forms control fits:
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 17d ago Changed · +6 lines 292d3b698ce5
- 19d ago Changed efabe2918a51
- 20d ago Changed · +5 lines 27ecfce844b2
- 22d ago Changed · -1 lines 78da11a98118
- 29d ago Changed · +2 lines 6a8918e538f6
- 1mo ago Changed · +2 lines 3785e9c6ba14
- 2mo ago First seen · 391 lines · 84 tokens per session scan A f221507a0a90
gum-integration is a skill published in the GitHub repository vchelaru/FlatRedBall2 (15 stars, last pushed yesterday), licensed MIT. It adds 84 tokens to every session and 6,534 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
gum-integration compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| gum-integrationvchelaru/FlatRedBall2 | Skill | 15 | yesterday | MIT | A | 84 | Claude Code, Codex |
| playtest-reportDonchitos/Claude-Code-Game-Studios | Skill | 36k | 19d ago | MIT | A | 20 | Claude Code |
| godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills | Skill | 6.9k | 10d ago | Apache-2.0 | A | 95 | Claude Code |
| scenario-unreal-gameplayscenario-labs/skills | Skill | 3.2k | yesterday | MIT | A | 121 | Claude Code |
| motionOpenDCAI/GameFactory-3A | Skill | 1.0k | 8d ago | Apache-2.0 | A | 0 | Claude Code, Codex |
| unity-addressablesBesty0728/Unity-Skills | Skill | 1.9k | yesterday | MIT | A | 25 | Claude Code, Codex |
| unity-manual-componentBesty0728/Unity-Skills | Skill | 1.9k | yesterday | MIT | A | 36 | Claude Code, Codex |