Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Ed3Design/ed3design-engineering-bundles/plugin install cad-designWrote 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/ed3design/ed3design-engineering-bundles/cad-api-scripting)<a href="https://agentmods.dev/skills/ed3design/ed3design-engineering-bundles/cad-api-scripting"><img src="https://agentmods.dev/badge/skills/ed3design/ed3design-engineering-bundles/cad-api-scripting/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/ed3design/ed3design-engineering-bundles/cad-api-scripting"><img src="https://agentmods.dev/badge/skills/ed3design/ed3design-engineering-bundles/cad-api-scripting.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 | $0.00169 | $0.01963 |
| Opus 5.5 | $0.00068 | $0.00785 |
| Sonnet 5.5 | $0.00034 | $0.00393 |
| Haiku 4.5 | $0.00017 | $0.00196 |
Grade A, and why
cad-api-scripting 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 1mo 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 — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CAD API Scripting
A skill for generating, reviewing, and debugging code that drives CAD systems programmatically. Covers Python-based APIs (commercial CAD platforms), declarative languages (OpenSCAD), and similar scripting interfaces.
When to use
- User has a finished or near-finished design and wants to translate it into a reusable script
- User wants to import a parameter table into a CAD system from JSON/CSV
- User wants to generate repetitive geometry algorithmically (grids, arrays, variant families)
- User is debugging an existing CAD script
- User wants to expose a design as a configurable OpenSCAD module
When NOT to use
- User is still exploring design options →
design-first-iteration - User wants step-by-step manual CAD guidance →
cad-construction - User wants general mechanical design principles →
mechanical-design-principles - User wants firmware code or web backend code → other engineering skills
Workflow
Phase 1: Clarify the target platform
Before writing a single line, confirm:
- Which CAD platform / scripting language?
- Commercial (Fusion 360, SolidWorks, Onshape, Inventor, NX) — almost always Python or JavaScript-based
- Open-source (FreeCAD, Blender for CAD, OpenSCAD, CadQuery, Build123d)
- Declarative (OpenSCAD, JSCAD)
- Which API version / library version? APIs change. An older Fusion 360 script may not run on the current API.
- Goal of the script: one-shot generation, reusable module, parameter-import utility, test harness?
If the user is unclear, ask 1–2 targeted questions. Do not assume.
Phase 2: Sketch the code structure before writing
For non-trivial scripts, outline in plain text first:
- Setup (imports, app/document handle, parameter loading)
- Parameter definitions (from file or hardcoded)
- Helper functions (reusable geometry operations)
- Main construction sequence (sketches, features, assembly)
- Error handling and cleanup
- Save / export step
This structure sketch is the place to catch missing inputs, unclear naming, or scope creep — not the middle of a 200-line script.
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.
- 1mo ago First seen · 151 lines · 169 tokens per session scan A a0dab87f4d01
cad-api-scripting is a skill published in the GitHub repository Ed3Design/ed3design-engineering-bundles (2 stars, last pushed 2mo ago), licensed MIT. It adds 169 tokens to every session and 1,963 once invoked, about $0.0007 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 2026-08-31.
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