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openscad-iterative-modeling

openscad-iterative-modeling is a skill for Claude Code, Codex from fboldo/openscad-mcp-server. It costs 108 tokens per session (1,312 once invoked), scanned A, original, MIT.

A workflow for creating parametric 3D models in OpenSCAD, a tool that describes shapes with code. It renders image previews, reviews them, and refines the SCAD code until the model matches the request.

In plain words
What is it for?
Use it to design parts such as brackets, enclosures, mounts, or gears, recreate objects from pictures, render previews, or export STL files for 3D printing.
Why use it?
It makes it easier to catch and correct geometry problems through repeated visual checks instead of relying only on the source code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 8repo 1mo ago A scan 108 tokens original MIT

Good fit Use it to design parts such as brackets, enclosures, mounts, or gears, recreate objects from pictures, render previews, or export STL files for 3D printing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fboldo/openscad-mcp-server/openscad-iterative-modeling
View source ↗ fboldo/openscad-mcp-server
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.

Any agent
npx skills add fboldo/openscad-mcp-server --skill openscad-iterative-modeling
Clone the repo
git clone --depth 1 https://github.com/fboldo/openscad-mcp-server

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.

agentmods badge for openscad-iterative-modeling

README.md
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Your own site
<a href="https://agentmods.dev/skills/fboldo/openscad-mcp-server/openscad-iterative-modeling"><img src="https://agentmods.dev/badge/skills/fboldo/openscad-mcp-server/openscad-iterative-modeling/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.

agentmods 80×15 button for openscad-iterative-modeling

Your own site · 80×15
<a href="https://agentmods.dev/skills/fboldo/openscad-mcp-server/openscad-iterative-modeling"><img src="https://agentmods.dev/badge/skills/fboldo/openscad-mcp-server/openscad-iterative-modeling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,312 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00108 $0.01312
Opus 5.5 $0.00043 $0.00525
Sonnet 5.5 $0.00022 $0.00262
Haiku 4.5 $0.00011 $0.00131

Measured 2mo ago against content hash dc173b26fcee, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openscad-iterative-modeling 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 2mo 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.

skills/openscad-iterative-modeling/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSCAD iterative modeling loop (SCAD → PNG → refine)

When to Use This Skill

  • The user asks to create, design, or model a 3D object (bracket, enclosure, mount, gear, etc.)
  • The user sends a picture of an object and asks to recreate it in 3D
  • The user wants to render or preview OpenSCAD code
  • The user asks to export an STL file from a SCAD description
  • Any request that can be expressed as parametric CSG geometry

Prerequisites

Required Tools

  • OpenSCAD MCP Server: Required for rendering and exporting OpenSCAD geometry
    • Enables: render_scad_png (SCAD → PNG preview), export_scad_stl (SCAD → STL mesh)
    • Tool names may be namespaced by the host (e.g. mcp_openscad-mcp-_render_scad_png); match by suffix
    • Must be configured and running to render previews and export models

Operating mode

  • Prefer small, parametric SCAD with named variables.
  • Each iteration: change only what the PNG critique indicates.
  • After 3 render-refine cycles without convergence, stop and ask the user for clarification.

Workflow

1. Normalize the request (minimal clarifications)

Extract and confirm only what you must to model correctly:

  • Units (default to mm if unspecified)
  • Critical dimensions (overall size, hole diameters, wall thickness)
  • Constraints (must be printable? tolerance? symmetry? sharp vs filleted edges?)

If key dimensions are missing, ask 1–3 questions. Otherwise proceed with reasonable defaults and state them.

2. Draft SCAD code (first pass)

  • Use module with named parameters.
  • Center geometry at the origin when practical (center=true).
  • Set $fn explicitly for curved parts (start with $fn=64).
  • Ensure cutters in difference() extend beyond the body to avoid zero-thickness walls.

3. Render a PNG preview

Render with cameraPreset="isometric" first (width=800, height=600). If features are hard to judge, add orthographic views:

Feature to verify Camera preset
Plan-view layout, hole positions top
Heights, steps, lips, profiles front or right
Overall shape, proportions isometric
Underside features bottom

Read the full file on GitHub · 127 lines

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.

  1. 2mo ago First seen · 127 lines · 108 tokens per session scan A dc173b26fcee

Subscribe to this mod's changes

openscad-iterative-modeling is a skill published in the GitHub repository fboldo/openscad-mcp-server (8 stars, last pushed 1mo ago), licensed MIT. It adds 108 tokens to every session and 1,312 once invoked, about $0.0004 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.

Design and UX
Related

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openscad-iterative-modeling next to 6 skills from other repositories
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