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 w1ne/kernelCAD-web --skill kernelcad-nurbsgit clone --depth 1 https://github.com/w1ne/kernelCAD-webWrote 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/w1ne/kernelcad-web/kernelcad-nurbs)<a href="https://agentmods.dev/skills/w1ne/kernelcad-web/kernelcad-nurbs"><img src="https://agentmods.dev/badge/skills/w1ne/kernelcad-web/kernelcad-nurbs/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/w1ne/kernelcad-web/kernelcad-nurbs"><img src="https://agentmods.dev/badge/skills/w1ne/kernelcad-web/kernelcad-nurbs.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 | $0.00125 | $0.08662 |
| Opus 5.5 | $0.00050 | $0.03465 |
| Sonnet 5.5 | $0.00025 | $0.01732 |
| Haiku 4.5 | $0.00013 | $0.00866 |
Grade A, and why
kernelcad-nurbs 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 today.
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 — 448 lines — stays where its author put it; the contents beside it link to each section on GitHub.
kernelCAD — NURBS surfaces & curves
Build free-form panels, lofted shells, organic spines, and tapered swept solids whose result enters the existing Shape pipeline (booleans, fillets, exports).
// Lofted free-form panel from sketch sections
const s0 = path().moveTo(-30, -10).lineTo(30, -10).lineTo(30, 10).lineTo(-30, 10).close();
// (use sketch('xy', { offset: <z> }).path()...close() to place sections at different z)
const panel = surfaceFromCurves([s0, s1]).thicken(2);
nurbsSurface({ controls, degree, weights?, knots?, periodic? }) returns a Surface peer to Shape. The Surface exposes these escape methods:
| Method | Returns | Notes |
|---|---|---|
.thicken(t) |
Shape (closed solid) |
Offsets both sides by t mm. t accepts Editable<number>. |
.toShape() |
Shape (zero-volume shell) |
Single-face Shape; use as profile placeholder for future face-aware features. |
.trimTo(by) |
Surface |
Trim this surface where it meets by and keep the larger piece. Use before sew. Emits feature.surface-trim.no-intersection when the cutter misses. |
.split(by) |
[Surface, Surface] |
Split this surface at its intersection with by (a Surface cutter) and return both resulting halves, ordered by descending area. The cutter must be a Surface; Shape/Curve3D cutters are deferred. Emits feature.surface-trim.no-intersection when the cutter misses. |
Top-level finishing ops that consume Surface instances:
sew(surfaces, opts?)— stitch N surfaces into a shell or closed solid. Edges withintolerancemm (default 1e-6) are merged.requireClosed: trueemitsfeature.surface-sew.open-shellinstead of a partial shell when the result is still open. Returns aShape.- The workflow for a multi-patch body:
trimToeach patch to shared boundary curves →sew([...], { requireClosed: true })→ optionally.draft(angleDeg, { face })for mold release.
surfaceFromCurves(sections) skins through 2+ closed Sketch cross-sections in declaration order. Section order = skin direction.
Rational NURBS surface weights are honored (v0.14.0). Supplying weights builds an exact rational surface — use them for exact circles, cylinders, spheres, and conics rather than approximating with control points. (3D nurbsCurve weights are still non-rational; that lane is deferred.)
What ships with it
5 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.
- today Changed · -5 lines df576e81ddd7
- 16d ago Changed acdbaabb7e35
- 1mo ago Changed · +12 lines ff165ac9d815
- 1mo ago Changed 87477df5331c
- 1mo ago Changed · +48 lines · +20 tokens per session 2e78552be9bc
- 1mo ago First seen · 393 lines · 105 tokens per session scan A a21379c6778b
kernelcad-nurbs is a skill published in the GitHub repository w1ne/kernelCAD-web (33 stars, last pushed today), licensed MIT. It adds 125 tokens to every session and 8,662 once invoked, about $0.0005 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.
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