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 niaka3dayo/agent-skills-vrc-udon --skill unity-vrc-world-sdk-3git clone --depth 1 https://github.com/niaka3dayo/agent-skills-vrc-udonWrote 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/niaka3dayo/agent-skills-vrc-udon/unity-vrc-world-sdk-3)<a href="https://agentmods.dev/skills/niaka3dayo/agent-skills-vrc-udon/unity-vrc-world-sdk-3"><img src="https://agentmods.dev/badge/skills/niaka3dayo/agent-skills-vrc-udon/unity-vrc-world-sdk-3/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/niaka3dayo/agent-skills-vrc-udon/unity-vrc-world-sdk-3"><img src="https://agentmods.dev/badge/skills/niaka3dayo/agent-skills-vrc-udon/unity-vrc-world-sdk-3.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 5 findings, 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 Prompt Injection · line 472 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 477 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 478 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 480 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 482 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00247 | $0.06790 |
| Opus 5 | $0.00123 | $0.03395 |
| Sonnet 5 | $0.00049 | $0.01358 |
| Haiku 4.5 | $0.00025 | $0.00679 |
Grade A, and why
unity-vrc-world-sdk-3 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 7d 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 — 483 lines — stays where its author put it; the contents beside it link to each section on GitHub.
VRChat World SDK 3 Guide
Table of Contents
| Section | Content | Reference |
|---|---|---|
| Scene Setup | VRC_SceneDescriptor, Spawn | This file |
| Components | Pickup, Station, Mirror | references/components.md |
| Layers & Collision | Layers, Collision Matrix | references/layers.md |
| Performance | Optimization guide | references/performance.md |
| Lighting | Lighting settings | references/lighting.md |
| Audio & Video | Audio, Video players | references/audio-video.md |
| Build Validation | Red/yellow/white SDK alerts | references/build-validation.md |
| World Upload | Upload workflow | references/upload.md |
| Troubleshooting | Problem solving | references/troubleshooting.md |
| Cheatsheet | Quick reference | CHEATSHEET.md |
Method Migration
The following public methods were renamed because an unprefixed, parameterless public UdonSharp method remains callable through legacy network dispatch:
| Before | After |
|---|---|
ForceDropPickup |
_ForceDropPickup |
IsHeld |
_IsHeld |
IsOccupied |
_IsOccupied |
StopSound |
_StopSound |
SlowUpdate |
_SlowUpdate |
Update Inspector event strings, SendCustomEvent* calls, delayed events and
nameof(...) expressions, and cross-behaviour calls. Compatibility aliases are
not provided because an old unprefixed alias would restore the same legacy network exposure.
What ships with it
12 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.
- assets/templates/VRC_Pickup_Rigidbody.cs 7.2 KB
- assets/templates/VRC_Station_Basic.cs 7.7 KB
- CHEATSHEET.md 12 KB
- LICENSE.txt 1.0 KB
- references/audio-video.md 23 KB
- references/build-validation.md 27 KB
- references/components.md 29 KB
- references/layers.md 7.4 KB
- references/lighting.md 12 KB
- references/performance.md 23 KB
- references/troubleshooting.md 13 KB
- references/upload.md 12 KB
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.
- 7d ago Changed · +3 lines · +22 tokens per session d669500a279f
- 13d ago First seen · 480 lines · 225 tokens per session scan A 8e26fe610fdc
unity-vrc-world-sdk-3 is a skill published in the GitHub repository niaka3dayo/agent-skills-vrc-udon (299 stars, last pushed 7d ago), licensed MIT. It adds 247 tokens to every session and 6,790 once invoked, about $0.0012 per session on Opus 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.
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