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arduino-skills: Skill for Claude Code

.agents/skills/plugin-creator/SKILL.md

plugin-creator is a skill for Claude Code, Codex from wedsamuel1230/arduino-skills. It costs 77 tokens per session (1,460 once invoked), scanned A, original, MIT.

A scaffolding tool for creating Codex plugin folders with the required manifest file and optional supporting folders. It also supports creating or updating a marketplace entry.

In plain words
What is it for?
Use it to create a local plugin skeleton, prepare it for testing or publishing, and add it to a repository marketplace list.
Why use it?
It removes the need to remember the folder layout and required files when starting a plugin.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents); mentions Codex.

This is wedsamuel1230/arduino-skills's own configuration. It tells Claude Code and Codex how to work on arduino-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything arduino-skills configures →

Part of the arduino-skills plugin — 33 skills shipped together

not rated 21repo 22d ago A scan SkillSpector: warn 77 tokens original MIT
View source ↗ wedsamuel1230/arduino-skills
Reuse

Borrowing it

Nothing to install: this file belongs to wedsamuel1230/arduino-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/wedsamuel1230/arduino-skills/main/.agents/skills/plugin-creator/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/wedsamuel1230/arduino-skills

Made for: Claude Code, Codex.

Or install arduino-skills, the plugin that ships this one along with the rest of its 33 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 plugin-creator

README.md
[![agentmods](https://agentmods.dev/badge/skills/wedsamuel1230/arduino-skills/plugin-creator/github.svg)](https://agentmods.dev/skills/wedsamuel1230/arduino-skills/plugin-creator)
Your own site
<a href="https://agentmods.dev/skills/wedsamuel1230/arduino-skills/plugin-creator"><img src="https://agentmods.dev/badge/skills/wedsamuel1230/arduino-skills/plugin-creator/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 plugin-creator

Your own site · 80×15
<a href="https://agentmods.dev/skills/wedsamuel1230/arduino-skills/plugin-creator"><img src="https://agentmods.dev/badge/skills/wedsamuel1230/arduino-skills/plugin-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,460 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
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Rogue Agent · line 3
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 $0.00077 $0.01460
Opus 5 $0.00039 $0.00730
Sonnet 5 $0.00015 $0.00292
Haiku 4.5 $0.00008 $0.00146

Measured 12d ago against content hash 3b43cb214f45, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

plugin-creator 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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/create_basic_plugin.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.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

.agents/skills/plugin-creator/SKILL.md · 161 lines

How it starts

The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plugin Creator

Quick Start

  1. Run the scaffold script:
  # Plugin names are normalized to lower-case hyphen-case and must be <= 64 chars.
  # The generated folder and plugin.json name are always the same.
# Run from repo root (or replace .agents/... with the absolute path to this SKILL).
# By default creates in <repo_root>/plugins/<plugin-name>.
python3 .agents/skills/plugin-creator/scripts/create_basic_plugin.py <plugin-name>

  1. Open <plugin-path>/.codex-plugin/plugin.json and replace [TODO: ...] placeholders.

  2. Generate or update the repo marketplace entry when the plugin should appear in Codex UI ordering:

# marketplace.json always lives at <repo-root>/.agents/plugins/marketplace.json
python3 .agents/skills/plugin-creator/scripts/create_basic_plugin.py my-plugin --with-marketplace

For a home-local plugin, treat <home> as the root and use:

python3 .agents/skills/plugin-creator/scripts/create_basic_plugin.py my-plugin \
  --path ~/plugins \
  --marketplace-path ~/.agents/plugins/marketplace.json \
  --with-marketplace
  1. Generate/adjust optional companion folders as needed:
python3 .agents/skills/plugin-creator/scripts/create_basic_plugin.py my-plugin --path <parent-plugin-directory> \
  --with-skills --with-hooks --with-scripts --with-assets --with-mcp --with-apps --with-marketplace

<parent-plugin-directory> is the directory where the plugin folder <plugin-name> will be created (for example ~/code/plugins).

What this skill creates

  • If the user has not made the plugin location explicit, ask whether they want a repo-local plugin or a home-local plugin before generating marketplace entries.
  • Creates plugin root at /<parent-plugin-directory>/<plugin-name>/.
  • Always creates /<parent-plugin-directory>/<plugin-name>/.codex-plugin/plugin.json.
  • Fills the manifest with the full schema shape, placeholder values, and the complete interface section.
  • Creates or updates <repo-root>/.agents/plugins/marketplace.json when --with-marketplace is set.
    • If the marketplace file does not exist yet, seed top-level name plus interface.displayName placeholders before adding the first plugin entry.
  • <plugin-name> is normalized using skill-creator naming rules:
    • My Plugin → my-plugin
    • My--Plugin → my-plugin
    • underscores, spaces, and punctuation are converted to -
    • result is lower-case hyphen-delimited with consecutive hyphens collapsed
  • Supports optional creation of:
    • skills/
    • hooks/
    • scripts/
    • assets/
    • .mcp.json
    • .app.json

Read the full file on GitHub · 161 lines

Files

What ships with it

4 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. 12d ago First seen · 161 lines · 77 tokens per session scan A 3b43cb214f45

Subscribe to this mod's changes

plugin-creator is a skill published in the GitHub repository wedsamuel1230/arduino-skills (21 stars, last pushed 22d ago), licensed MIT. It adds 77 tokens to every session and 1,460 once invoked, about $0.0004 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.

Building agentsCode Generationarduinoembedded-systemsmakermit-licenseskills
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