gcode

gcode is a skill for Claude Code, Codex from earthtojake/text-to-cad. It costs 115 tokens per session (1,111 once invoked), scanned A, original, MIT.

A tool guide for creating and checking G-code, the machine instructions used by FDM 3D printers, from 3D model files. It works with local slicer programs and requires a printer-profile wrapper.

In plain words
What is it for?
Use it to inspect STL, OBJ, 3MF, PLY, GLB, or GLTF models, discover available slicers, dry-run slicing, and produce printer-profiled G-code.
Why use it?
It reduces mistakes when preparing models for slicing and lets you inspect or preview the slicer command before running it.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: $skill-name invocation.

Part of the text-to-cad plugin — 13 skills shipped together

Good fit Use it to inspect STL, OBJ, 3MF, PLY, GLB, or GLTF models, discover available slicers, dry-run slicing, and produce printer-profiled G-code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/earthtojake/text-to-cad/gcode
About the project

text-to-cad is a collection of agent workflows for creating, examining, finding, preparing, and transferring CAD, engineering, manufacturing, and robot-description files. It is for agents working with mechanical design, fabrication, simulation, and robotics projects. Catalogue skills, instructions, and a plugin implement these workflows.

earthtojake/text-to-cad · 22,540 stars · on GitHub · texttocad.dev

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 earthtojake/text-to-cad --skill gcode
Clone the repo
git clone --depth 1 https://github.com/earthtojake/text-to-cad

Made for: Claude Code, Codex.

Or install text-to-cad, the plugin that ships this one along with the rest of its 13 skills.

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 gcode

README.md
[![agentmods](https://agentmods.dev/badge/skills/earthtojake/text-to-cad/gcode/github.svg)](https://agentmods.dev/skills/earthtojake/text-to-cad/gcode)
Your own site
<a href="https://agentmods.dev/skills/earthtojake/text-to-cad/gcode"><img src="https://agentmods.dev/badge/skills/earthtojake/text-to-cad/gcode/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 gcode

Your own site · 80×15
<a href="https://agentmods.dev/skills/earthtojake/text-to-cad/gcode"><img src="https://agentmods.dev/badge/skills/earthtojake/text-to-cad/gcode.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 115 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,111 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. Third-party audits
  • Socket pass 3 Oct 2026
  • Snyk pass 3 Oct 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00115 $0.01111
Opus 5.5 $0.00046 $0.00444
Sonnet 5.5 $0.00023 $0.00222
Haiku 4.5 $0.00012 $0.00111

Measured 19d ago against content hash abef30775a9d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gcode 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 19d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/orca_presets.py), 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/gcode/SKILL.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

G-code

Provenance: maintained in earthtojake/text-to-cad. Use the installed local skill files as the runtime source of truth; the repository link is only for provenance and release review.

Slice with OrcaSlicer, headless (below) or by opening the model in the OrcaSlicer app for the user. The agent never contacts a printer: for a Bambu Lab printer, hand the result to $bambu-labs; for any other printer, give the user the .gcode.

Install OrcaSlicer

  • macOS: brew install --cask orcaslicer. The command line is /Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer.
  • Windows and Linux: install a release from https://github.com/OrcaSlicer/OrcaSlicer/releases. The command is orca-slicer; on Linux, run it from the AppImage or Flatpak.

Below, <orca> is that command.

Slice headless

OrcaSlicer's command line (https://www.orcaslicer.com/wiki/cli/cli_mode) needs complete presets: it doesn't fill in a preset's parent settings, and it slices only with a process whose compatible printers name the printer. scripts/orca_presets.py (Python 3, no dependencies) writes them from OrcaSlicer's presets, searching the user's own first, then OrcaSlicer's built-in profiles.

  1. Find the user's printer, process and filament presets. Prefer the presets the user prints with; never invent one, since a wrong bed size or temperature can damage the printer.

    python scripts/orca_presets.py --list machine --match "MK4S"
    python scripts/orca_presets.py --list process --match "@MK4S 0.4"
    python scripts/orca_presets.py --list filament --match "PLA @MK4S"
    
  2. Write the complete presets:

    python scripts/orca_presets.py --printer "Prusa MK4S 0.4 nozzle" \
      --process "0.20mm SPEED @MK4S 0.4" --filament "Prusa Generic PLA @MK4S" \
      --out presets
    
  3. Slice. Give --outputdir an absolute path:

    <orca> model.stl \
      --load-settings "presets/process.json;presets/printer.json" \
      --load-filaments presets/filament-1.json \
      --arrange 1 --slice 0 \
      --outputdir /absolute/path/to/out --export-3mf model.gcode.3mf
    

Read the full file on GitHub · 94 lines

Files

What ships with it

3 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.

  1. 19d ago Changed · +1 lines abef30775a9d
  2. 20d ago Changed · -45 lines · +13 tokens per session b301e4035420
  3. 1mo ago Changed c0c08cb2989a
  4. 1mo ago First seen · 138 lines · 102 tokens per session scan A fb7fb0ce9c71

Subscribe to this mod's changes

gcode is a skill published in the GitHub repository earthtojake/text-to-cad (22,540 stars, last pushed today), licensed MIT. It adds 115 tokens to every session and 1,111 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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