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 agentmods add skills/w1ne/kernelcad-web/kernelcadnpx skills add w1ne/kernelCAD-web --skill kernelcadgit clone --depth 1 https://github.com/w1ne/kernelCAD-webWhat 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 | $0.00036 | $0.02249 |
| Opus 5 | $0.00018 | $0.01125 |
| Sonnet 5 | $0.00007 | $0.00450 |
| Haiku 4.5 | $0.00004 | $0.00225 |
Grade A, and why
kernelcad 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 2d 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 — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
kernelCAD
A two-tier skill system. Load kernelcad-authoring to write or modify any .kcad.ts model. Add specialty skills as the task demands.
Decision tree
- Authoring or editing
.kcad.tsgeometry → loadkernelcad-authoring. - Building from a reference photo or visual brief → also load
kernelcad-from-reference. - Adding fillets, chamfers, shells, holes, cutouts → also load
kernelcad-features. - Editable parameters / set_param / live sliders → also load
kernelcad-params. - Multi-part with joints / mates / connectors → also load
kernelcad-assemblies. - Need an off-the-shelf fastener, bearing, motor, header, or connector → also load
kernelcad-parts. - Freeform NURBS surfaces, NURBS curves, Coons patches, multi-section sweeps, G2 fillet continuity, or freeform 2D path outlines (
nurbsSurface,surfaceFromCurves,surfaceFromBoundary,nurbsCurve,spline3d,hermiteG2,variableSweep,fillet({ continuity: 'G2' }),path().spline(...),path().nurbsSegment(...),path().hermiteG2(...)) → also loadkernelcad-nurbs. - Mechanical patterns (linear / circular / grid replication of a sub-feature) → also load
kernelcad-patterns. - Folded sheet-metal parts (brackets, channels, panels, bend tables, flat patterns) → also load
kernelcad-sheet-metal. - Signed-distance fields (smooth-blended primitives, organic shapes via
sdf.*+materialize) → also loadkernelcad-fields. - Exporting an assembly to URDF for a motion planner or simulator → also load
kernelcad-urdf. - Adding planning groups / end-effectors / allowed-collision data on top of a URDF → also load
kernelcad-srdf. - Exporting an assembly with closed kinematic loops or a native ball joint → also load
kernelcad-sdformat. - Producing a 2D engineering-drawing sheet (third-angle views, hidden lines, dimensions, title block) → also load
kernelcad-drawings. - Introspecting a running model via MCP (
inspect({ of: 'features' }), edit ops, diagnostics) → loadkernelcad-mcpinstead of authoring. - Feasibility gates on moving assemblies — collision sweeps across joint ranges, IK reachability, mounting-hole consistency, static-load capacity (
checkSweptCollision,checkReachable,checkMountingHoleConsistency,checkLoadCapacity) → also loadkernelcad-kinematic.
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.
- 2d ago First seen · 61 lines · 36 tokens per session scan A 49bc61353aaa
kernelcad is a skill published in the GitHub repository w1ne/kernelCAD-web (17 stars, last pushed 4d ago), licensed MIT. It adds 36 tokens to every session and 2,249 once invoked, about $0.0002 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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