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 AlexeyPerov/Unity-Open-MCP --skill navigationgit clone --depth 1 https://github.com/AlexeyPerov/Unity-Open-MCPWrote 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/alexeyperov/unity-open-mcp/navigation)<a href="https://agentmods.dev/skills/alexeyperov/unity-open-mcp/navigation"><img src="https://agentmods.dev/badge/skills/alexeyperov/unity-open-mcp/navigation/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/alexeyperov/unity-open-mcp/navigation"><img src="https://agentmods.dev/badge/skills/alexeyperov/unity-open-mcp/navigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00000 | $0.01724 |
| Opus 5 | $0.00000 | $0.00862 |
| Sonnet 5 | $0.00000 | $0.00345 |
| Haiku 4.5 | $0.00000 | $0.00172 |
Grade A, and why
navigation 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 10d 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 — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Unity Open MCP — Navigation (NavMesh) Extension
Skill for AI agents driving NavMesh / AI Navigation in a Unity project through the unity-open-mcp MCP server.
This domain is embedded in the bridge and opt-in. Its tools compile in only when the project has
com.unity.ai.navigationinstalled (the bridge sets theUNITY_OPEN_MCP_EXT_NAVIGATIONdefine automatically). Its tool group is hidden fromListToolsuntil the connected session activates it.
Preconditions
- Unity Editor is open with the target project.
unity_open_mcp_pingreturnsconnected: true.- The project has
com.unity.ai.navigationinstalled. Ifcapabilitiesreports thenavigationgroup asavailable: false, install the package and let the bridge recompile. - The
navigationtool group is activated — callunity_open_mcp_manage_tools(action="activate", group="navigation")before invoking anynavigation_*tool. Fresh sessions start with two default-on groups (coreandgate-and-verify); activate the other groups you need on demand.
Tool prefix
All tools in this pack use unity_open_mcp_navigation_*. Mutating tools accept the standard paths_hint (the host's scene path) and run the full gate path; read-only tools (navigation_list, navigation_get) are gate-free.
Canonical workflow: walkable agent
- Discover —
unity_open_mcp_navigation_listto see existing surfaces / agents / links / modifiers. - Add a surface —
unity_open_mcp_navigation_surface_addon a host GameObject. Setagent_type: "Humanoid"(default) andcollect_objects: "All"to bake all scene geometry. - (Optional) Configure —
unity_open_mcp_navigation_set_bake_settingsforcollect_objects: "Volume"+collection_extentto bake only a sub-region. - Bake —
unity_open_mcp_navigation_surface_bake. This is the heavy op (EditorSettle lifecycle) — the dispatcher waits for asset refresh before returning. ReturnshasNavMeshData: true+ anavMeshDataInstanceId. - Place an agent —
unity_open_mcp_navigation_agent_addon the GameObject that should walk. Configureradius,height,speed,angular_speed,acceleration,stopping_distance. - Drive it —
unity_open_mcp_navigation_agent_set_destinationwith a world-spacex,y,z. Requires Play Mode — the pathfinder only runs at runtime. ReturnspathStatus: Valid | Partial | Invalid+pathPending.
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.
- 10d ago First seen · 111 lines · 0 tokens per session scan A 7c3ca401504a
navigation is a skill published in the GitHub repository AlexeyPerov/Unity-Open-MCP (12 stars, last pushed 12d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,724 tokens. 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 2026-08-31.
Other skills, from other repositories
develop-web-game
Use when Codex is building or iterating on a web game (HTML/JS) and needs a reliable development + testing loop: implement small changes, run a Playwright-based test script with short input bursts and intentional pauses, inspect screenshots/text, and review console errors with rendergametotext.
peer-review
Structured manuscript/grant review with checklist-based evaluation. Use when writing formal peer reviews with specific criteria methodology assessment, statistical validity, reporting standards compliance (CONSORT/STROBE), and constructive feedback. Best for actual review writing, manuscript revision. For evaluating…
scientific-critical-thinking
Evaluate scientific claims and evidence quality. Use for assessing experimental design validity, identifying biases and confounders, applying evidence grading frameworks (GRADE, Cochrane Risk of Bias), or teaching critical analysis. Best for understanding evidence quality, identifying flaws. For formal peer review…
scientific-schematics
Create publication-quality scientific diagrams using Nano Banana 2 AI with smart iterative refinement. Uses Gemini 3.1 Pro Preview for quality review. Only regenerates if quality is below threshold for your document type. Specialized in neural network architectures, system diagrams, flowcharts, biological pathways…
hypothesis-generation
Structured hypothesis formulation from observations. Use when you have experimental observations or data and need to formulate testable hypotheses with predictions, propose mechanisms, and design experiments to test them. Follows scientific method framework. For open-ended ideation use scientific-brainstorming; for…
scientific-brainstorming
Creative research ideation and exploration. Use for open-ended brainstorming sessions, exploring interdisciplinary connections, challenging assumptions, or identifying research gaps. Best for early-stage research planning when you do not have specific observations yet. For formulating testable hypotheses from data use…