A control interface for operating a computer numerical control (CNC) machine, which moves tools to cut or shape material. It can move the machine, run G-code instructions, manage jobs, and control the spindle and coolant.

Use it to home, unlock, jog, or probe a CNC machine; set work coordinates; load, start, pause, resume, or stop G-code jobs; and adjust feed, spindle, or coolant settings.

It puts common machine controls in one place, but actions can cause physical movement and need user confirmation.

cnc-control — Skill for Claude Code by brs077

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 brs077/CNC-design-control-MCP --skill cnc-control

Clone the repo

git clone --depth 1 https://github.com/brs077/CNC-design-control-MCP

Made for: Claude Code.

Or install cncjs-mcp, the plugin that ships this one along with the rest of its 12 skills, 4 commands, 1 MCP server.

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/brs077/cnc-design-control-mcp/cnc-control/github.svg)](https://agentmods.dev/skills/brs077/cnc-design-control-mcp/cnc-control)

Your own site

<a href="https://agentmods.dev/skills/brs077/cnc-design-control-mcp/cnc-control"><img src="https://agentmods.dev/badge/skills/brs077/cnc-design-control-mcp/cnc-control/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/brs077/cnc-design-control-mcp/cnc-control"><img src="https://agentmods.dev/badge/skills/brs077/cnc-design-control-mcp/cnc-control.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 410 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.

Model	Per session	Once invoked
Fable 5.1	$0.00045	$0.00410
Opus 5	$0.00023	$0.00205
Sonnet 5	$0.00009	$0.00082
Haiku 4.5	$0.00005	$0.00041

Measured 9d ago against content hash 1b767f904883, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cnc-control 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 9d 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/cnc-control/SKILL.md · 45 lines

What it actually says

CNC Machine Control

Control the CNC machine. These tools cause physical motion — always confirm with the user before executing.

Available MCP Tools

Motion & Setup

send_gcode — Send raw G-code lines to the machine (HIGH RISK — causes motion)
home_machine — Run GRBL homing cycle ($H)
unlock_machine — Clear GRBL alarm lock ($X)
jog — Jog the machine in X/Y/Z at a specified feed rate
set_work_zero — Set current position as work zero for specified axes
set_wcs — Switch active work coordinate system (G54-G59)
probe_z — Run Z-axis touch probe cycle

Job Control

load_gcode — Load G-code content into CNCjs
start_job — Start executing loaded G-code
pause_job — Pause the running job
resume_job — Resume a paused job
stop_job — Stop and cancel the current job

Overrides

set_feed_override — Adjust feed rate override (percentage)
set_spindle_override — Adjust spindle speed override (percentage)

Actuators

spindle_control — Turn spindle on (CW/CCW with speed) or off
coolant_control — Turn flood/mist coolant on or off

Macros

run_macro — Execute a CNCjs macro by name or ID

Safety

Always confirm motion commands with the user
Check machine position before jogging
Use feed_hold or emergency_stop if something goes wrong
Verify work zero is set correctly before starting jobs

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.

9d ago First seen · 45 lines · 45 tokens per session scan A 1b767f904883

Subscribe to this mod's changes

cnc-control is a skill published in the GitHub repository brs077/CNC-design-control-MCP (1 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 410 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 2026-08-31.

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