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 sechiro/VRCUdonSkills-for-Codex --skill vrc-udon-fukuro-udongit clone --depth 1 https://github.com/sechiro/VRCUdonSkills-for-CodexWrote 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/sechiro/vrcudonskills-for-codex/vrc-udon-fukuro-udon)<a href="https://agentmods.dev/skills/sechiro/vrcudonskills-for-codex/vrc-udon-fukuro-udon"><img src="https://agentmods.dev/badge/skills/sechiro/vrcudonskills-for-codex/vrc-udon-fukuro-udon/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/sechiro/vrcudonskills-for-codex/vrc-udon-fukuro-udon"><img src="https://agentmods.dev/badge/skills/sechiro/vrcudonskills-for-codex/vrc-udon-fukuro-udon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00097 | $0.00632 |
| Opus 5.5 | $0.00039 | $0.00253 |
| Sonnet 5.5 | $0.00019 | $0.00126 |
| Haiku 4.5 | $0.00010 | $0.00063 |
Grade A, and why
vrc-udon-fukuro-udon 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 2mo 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.
What it actually says
VRC Udon Fukuro Udon
役割
Fukuro Udon を導入している案件でだけ使う前提差分をまとめる。通常の UdonSharp ルールに追加して、同期方式と Pickup 設定を Fukuro Udon 前提へ寄せる。
この Skill を使う場面
- プロジェクトが Fukuro Udon を導入している
- 特に指定がない場合の既定動作を Fukuro Udon 前提にしたい
- Pickup 系の実装で VR 向け上書き設定を使う
この Skill を使わない場面
- Fukuro Udon を導入していない案件
- 通常の UdonSharp / VRC SDK 標準前提で十分な案件
既定ルール
- 特に指定がなければ、
VRCObjectSyncの代わりにManual Syncを使う Manual Syncを使うオブジェクトにはVRCObjectSyncを併用しない- VR 向け Pickup 上書き設定が必要なら
PickupPlatformOverrideを使う - Fukuro Udon 前提でも、project-owned 文書へ採用理由を残す
進め方
references/fukuro-default-rules.mdを読む。- Fukuro Udon 導入有無を確認する。
- Pickup / 物理同期オブジェクトで、
Manual Syncを既定にするか確認する。 - VR 向け Pickup 調整が必要なら
PickupPlatformOverrideを採用する。 - 導入先の
docs/SYSTEM_SPEC.mdと必要ならdocs/NETWORKING_RULES.mdに前提を書く。
併用ガイド
- 文書土台は
$vrc-udon-project-docs - モジュール構造は
$vrc-udon-core-module - networking 文書は
$vrc-udon-networking-rules - UI / Pickup 導線は
$vrc-udon-ui-menu
注意点
- Fukuro Udon 前提を通常案件へ持ち込まない
Manual SyncとVRCObjectSyncの二重適用をしない- PickupPlatformOverride の採用理由を文書化する
What ships with it
2 files 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.
- 2mo ago First seen · 50 lines · 97 tokens per session scan A 643e721d0b91
vrc-udon-fukuro-udon is a skill published in the GitHub repository sechiro/VRCUdonSkills-for-Codex (58 stars, last pushed 6mo ago), licensed MIT. It adds 97 tokens to every session and 632 once invoked, about $0.0004 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 2026-08-30.
vrc-udon-fukuro-udon compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| vrc-udon-fukuro-udonsechiro/VRCUdonSkills-for-Codex | Skill | 58 | 6mo ago | MIT | A | 97 | Codex |
| playtest-reportDonchitos/Claude-Code-Game-Studios | Skill | 36k | 18d ago | MIT | A | 20 | Claude Code |
| godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills | Skill | 6.9k | 9d 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 |