UnitySkills is a REST API-based automation engine that lets AI coding agents control Unity Editor projects, including scenes and other editor operations. It is for developers using Unity with supported coding agents and IDEs. The catalogue skills and commands provide the agent workflows used to operate Unity projects through the engine.
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 Besty0728/Unity-Skills --skill terraingit clone --depth 1 https://github.com/Besty0728/Unity-SkillsWrote 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/besty0728/unity-skills/terrain)<a href="https://agentmods.dev/skills/besty0728/unity-skills/terrain"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/terrain/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/besty0728/unity-skills/terrain"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/terrain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
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 →
- high Rogue Agent · line 19 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- medium Excessive Agency · line 20 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 | $0.00008 | $0.03602 |
| Opus 5 | $0.00004 | $0.01801 |
| Sonnet 5 | $0.00002 | $0.00720 |
| Haiku 4.5 | $0.00001 | $0.00360 |
Grade A, and why
unity-terrain 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 6d 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 — 338 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Before calling any skill in this module: if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via
GET /skills/recommend?includeSchema=true) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.
Triggers
- Creating or editing terrain
- Sculpting or smoothing heightmap
- Painting terrain texture layers
- 创建或编辑地形、雕刻或平滑高度图、绘制地形纹理层
Unity Terrain Skills
Guardrails
Operating Mode (v1.9 three-tier):
- Approval (default): query skills (
terrain_get_info,terrain_get_height) run directly. Create/modify skills (terrain_create,terrain_set_height,terrain_set_heights_batch,terrain_add_hill,terrain_generate_perlin,terrain_smooth,terrain_flatten,terrain_paint_texture) are FullAuto — onMODE_RESTRICTED, run the grant protocol;/permission/grantexecutes the skill server-side and returns the result. - Auto / Bypass: SemiAuto and FullAuto run directly.
- This module contains no Delete / PlayMode / Reload /
RiskLevel="high"skills — nothing auto-classifies as forbidden. To remove a terrain delete the asset viaasset_delete(subject to its own forbidden rules).
Note: All sculpt/paint operations require an existing Terrain in the scene, or use
terrain_createto generate one.
DO NOT (common hallucinations):
terrain_set_texturedoes not exist → useterrain_paint_texturewith layer index and brush parametersterrain_add_tree/terrain_add_grassdo not exist → these require Unity Terrain tools or custom scriptsterrain_set_sizedoes not exist → terrain dimensions are set at creation viaterrain_createterrain_import_heightmap/terrain_set_heightsdo not exist → useterrain_set_heights_batchwith a 2D heights array ([z][x]values 0-1)
Routing:
- For terrain material → use
materialmodule on terrain's material - For objects on terrain → use
gameobjectmodule to create/place objects
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.
- 6d ago First seen · 338 lines · 8 tokens per session scan A 7c2ed076cdfd
unity-terrain is a skill published in the GitHub repository Besty0728/Unity-Skills (1,727 stars, last pushed today), licensed MIT. It adds 8 tokens to every session and 3,602 once invoked, about $0.0000 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 2026-09-03.
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