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 nezolder/civil3d-mcp-roslyn --skill create_tin_surfacegit clone --depth 1 https://github.com/nezolder/civil3d-mcp-roslynWrote 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/nezolder/civil3d-mcp-roslyn/create_tin_surface)<a href="https://agentmods.dev/skills/nezolder/civil3d-mcp-roslyn/create_tin_surface"><img src="https://agentmods.dev/badge/skills/nezolder/civil3d-mcp-roslyn/create_tin_surface/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/nezolder/civil3d-mcp-roslyn/create_tin_surface"><img src="https://agentmods.dev/badge/skills/nezolder/civil3d-mcp-roslyn/create_tin_surface.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 | $0.00020 | $0.00331 |
| Opus 5.5 | $0.00008 | $0.00132 |
| Sonnet 5.5 | $0.00004 | $0.00066 |
| Haiku 4.5 | $0.00002 | $0.00033 |
Grade A, and why
create_tin_surface 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 28d 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
Code Template
// Create the TIN surface
var surfaceId = TinSurface.Create(Database, "SURFACE_NAME_HERE");
var surface = Transaction.GetObject(surfaceId, OpenMode.ForWrite) as TinSurface;
// Optionally set description
// surface.Description = "description here";
// Optionally add points
var pts = new Point3dCollection();
// pts.Add(new Point3d(x, y, z));
// pts.Add(new Point3d(x2, y2, z2));
if (pts.Count > 0)
{
surface.AddVertices(pts);
}
return new {
success = true,
name = surface.Name,
handle = surface.Handle.ToString(),
pointCount = surface.GetGeneralProperties().NumberOfPoints
};
Usage Notes
- Surface name must be unique in the drawing
- Points should be in the drawing's coordinate system
- Minimum 3 non-collinear points needed for a valid TIN surface
- Style can be set after creation via surface.StyleId
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.
- 28d ago First seen · 54 lines · 20 tokens per session scan A a0b4e5d4dbb9
create_tin_surface is a skill published in the GitHub repository nezolder/civil3d-mcp-roslyn (3 stars, last pushed today), licensed MIT. It adds 20 tokens to every session and 331 once invoked, about $0.0001 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.
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