A tool for creating and rendering OpenSCAD 3D models, which are models described with code. It can check the model, create previews, find adjustable parameters, and export STL files for 3D printing.

Use it to create or modify OpenSCAD files, generate multi-angle previews, validate syntax, extract parameters, and export printable STL files.

It gives a repeatable way to inspect and validate code-based models before sending them to a 3D printer.

openscad — Skill for Claude Code and Codex by mitsuhiko: A tool for creating and rendering OpenSCAD 3D models…

Install

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.

agentmods

npx agentmods add skills/mitsuhiko/agent-stuff/openscad

Any agent

npx skills add mitsuhiko/agent-stuff --skill openscad

Clone the repo

git clone --depth 1 https://github.com/mitsuhiko/agent-stuff

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/mitsuhiko/agent-stuff/openscad.svg)](https://agentmods.dev/skills/mitsuhiko/agent-stuff/openscad)

Your own site

<a href="https://agentmods.dev/skills/mitsuhiko/agent-stuff/openscad"><img src="https://agentmods.dev/badge/skills/mitsuhiko/agent-stuff/openscad.svg" alt="Measured on agentmods" height="20"></a>

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,716 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00042	$0.01716
Opus 5	$0.00021	$0.00858
Sonnet 5	$0.00008	$0.00343
Haiku 4.5	$0.00004	$0.00172

Measured 3d ago against content hash e49b7c056c4f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openscad 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 3d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (tools/common.sh, tools/export-stl.sh, tools/extract-params.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/openscad/SKILL.md · 233 lines

How it starts

The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSCAD Skill

Create, validate, and export OpenSCAD 3D models. Supports parameter customization, visual preview from multiple angles, and STL export for 3D printing platforms like MakerWorld.

Prerequisites

OpenSCAD must be installed. Install via Homebrew:

brew install openscad

Tools

This skill provides several tools in the tools/ directory:

Preview Generation

# Generate a single preview image
./tools/preview.sh model.scad output.png [--camera=x,y,z,tx,ty,tz,dist] [--size=800x600]

# Generate multi-angle preview (front, back, left, right, top, iso)
./tools/multi-preview.sh model.scad output_dir/

STL Export

# Export to STL for 3D printing
./tools/export-stl.sh model.scad output.stl [-D 'param=value']

Parameter Extraction

# Extract customizable parameters from an OpenSCAD file
./tools/extract-params.sh model.scad

Validation

# Check for syntax errors and warnings
./tools/validate.sh model.scad

Visual Validation (Required)

Always validate your OpenSCAD models visually after creating or modifying them.

After writing or editing any OpenSCAD file:

Generate multi-angle previews using multi-preview.sh
View each generated image using the read tool
Check for issues from multiple perspectives:
- Front/back: Verify symmetry, features, and proportions
- Left/right: Check depth and side profiles
- Top: Ensure top features are correct
- Isometric: Overall shape validation
Iterate if needed: If something looks wrong, fix the code and re-validate

This catches issues that syntax validation alone cannot detect:

Inverted normals or inside-out geometry
Misaligned features or incorrect boolean operations
Proportions that don't match the intended design
Missing or floating geometry
Z-fighting or overlapping surfaces

Never deliver an OpenSCAD model without visually confirming it looks correct from multiple angles.

Workflow

Read the full file on GitHub · 233 lines

Files

What ships with it

9 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.

Changes

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.

3d ago First seen · 233 lines · 42 tokens per session scan A e49b7c056c4f

Subscribe to this mod's changes

openscad is a skill published in the GitHub repository mitsuhiko/agent-stuff (3,032 stars, last pushed 2d ago), licensed Apache-2.0. It adds 42 tokens to every session and 1,716 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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