cardputer-buddy

cardputer-buddy is a skill for Claude Code from anthropics/claude-plugins-official. It costs 109 tokens per session (495 once invoked), scanned A, original, Apache-2.0.

A toolkit for developing MicroPython apps on a Cardputer-Adv, a small programmable device, after it has been set up. It supports apps such as Claude Buddy, Snake, and Hello.

In plain words
What is it for?
Use it to add apps, push changed files over USB, watch device logs, or run one-time commands in the device's Python prompt.
Why use it?
It makes it easier to update individual Python files, send them to the device, inspect serial output, and run commands without reinstalling the whole device bundle.

Skill for Claude Code ✓ vendor

Written for Claude Code: shipped in a Claude Code plugin.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 onboard/scripts/install_apps.py --port <PORT> --src buddy.

Part of the cwc-makers plugin — 2 skills, 1 command shipped together

Good fit Use it to add apps, push changed files over USB, watch device logs, or run one-time commands in the device's Python prompt.

Compare 6 skills from other repositories ↓
About the project

Claude Code Plugins Directory is a marketplace containing plugins for Claude Code, including tools, commands, skills, agents, hooks, and model context servers. Claude Code users browse it to install Anthropic-maintained or approved third-party extensions.

anthropics/claude-plugins-official · 44,117 stars · on GitHub · code.claude.com

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/anthropics/claude-plugins-official
agentmods
npx agentmods add skills/anthropics/claude-plugins-official/cardputer-buddy

Made for: Claude Code.

Or install cwc-makers, the plugin that ships this one along with the rest of its 2 skills, 1 command.

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 cardputer-buddy

README.md
[![agentmods](https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/cardputer-buddy/github.svg)](https://agentmods.dev/skills/anthropics/claude-plugins-official/cardputer-buddy)
Your own site
<a href="https://agentmods.dev/skills/anthropics/claude-plugins-official/cardputer-buddy"><img src="https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/cardputer-buddy/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 cardputer-buddy

Your own site · 80×15
<a href="https://agentmods.dev/skills/anthropics/claude-plugins-official/cardputer-buddy"><img src="https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/cardputer-buddy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 495 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 14 Sept 2026
  • Snyk pass 14 Sept 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 $0.00109 $0.00495
Opus 5.5 $0.00044 $0.00198
Sonnet 5.5 $0.00022 $0.00099
Haiku 4.5 $0.00011 $0.00049

Measured 1mo ago against content hash dae31d1459c8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cardputer-buddy 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 1mo 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

plugins/cwc-makers/skills/cardputer-buddy/SKILL.md · 47 lines

What it actually says

Cardputer Buddy app bundle

The buddy/ directory in the local build-with-claude clone is the MicroPython payload that m5-onboard installs onto /flash/. Work inside that clone.

Device layout

/flash/
├── main.py              launcher menu (replaces UIFlow's boot flow)
├── buddy_*.py           shared libs (BLE, UI, state, protocol, chars)
├── burst_frames.py      sprite frames
└── apps/
    ├── claude_buddy.py  BLE client → Claude Desktop's Hardware Buddy
    ├── hello_cardputer.py
    └── snake.py

main.py scans /flash/apps/ at boot and lists every .py as a menu entry. Drop a file into buddy/device/apps/, push it, and it appears on next boot.

Adding an app

Crib from buddy/device/apps/hello_cardputer.py — smallest example of keyboard polling, font, and exit conventions. Then push without re-flashing:

python3 onboard/scripts/install_apps.py --port <PORT> --src buddy

<PORT> is whatever detect.py reported last run (e.g. /dev/cu.usbmodem1101, /dev/ttyACM0, COM3).

Dev loop tooling (buddy/scripts/)

# Push a subset of files over USB-serial
python3 buddy/scripts/push.py --port <PORT> --files apps/snake.py

# Watch device logs
python3 buddy/scripts/tail_serial.py --port <PORT>

# One-shot REPL exec
python3 buddy/scripts/repl_run.py --port <PORT> --script "import os; print(os.listdir('/flash'))"
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. 1mo ago First seen · 47 lines · 109 tokens per session scan A dae31d1459c8

Subscribe to this mod's changes

cardputer-buddy is a skill published in the GitHub repository anthropics/claude-plugins-official (44,117 stars, last pushed today), licensed Apache-2.0. It adds 109 tokens to every session and 495 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 2026-09-03.

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