REPLACE-with-skill-name

REPLACE-with-skill-name is a skill for Claude Code, Codex from alexex1993/mcu-skills. It costs 104 tokens per session (724 once invoked), scanned A, original, MIT.

A partially filled guide and project template for developing firmware on an unspecified hardware board. Firmware is the software built into a device, and the missing board details are meant to be documented in reference files.

In plain words
What is it for?
Use it as a starting point for documenting a board, configuring clocks and pins, bringing up peripherals, building and flashing firmware, and debugging hardware problems.
Why use it?
The input does not identify the board or its components, so it cannot safely provide board-specific instructions. Its structure is intended to prevent mistakes caused by guessing hardware settings.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths.

Good fit Use it as a starting point for documenting a board, configuring clocks and pins, bringing up peripherals, building and flashing firmware, and debugging hardware problems.

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Install with agentmods
npx agentmods add skills/alexex1993/mcu-skills/skill-template
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 alexex1993/mcu-skills --skill skill-template
Clone the repo
git clone --depth 1 https://github.com/alexex1993/mcu-skills

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 REPLACE-with-skill-name

README.md
[![agentmods](https://agentmods.dev/badge/skills/alexex1993/mcu-skills/skill-template/github.svg)](https://agentmods.dev/skills/alexex1993/mcu-skills/skill-template)
Your own site
<a href="https://agentmods.dev/skills/alexex1993/mcu-skills/skill-template"><img src="https://agentmods.dev/badge/skills/alexex1993/mcu-skills/skill-template/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 REPLACE-with-skill-name

Your own site · 80×15
<a href="https://agentmods.dev/skills/alexex1993/mcu-skills/skill-template"><img src="https://agentmods.dev/badge/skills/alexex1993/mcu-skills/skill-template.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 104 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 724 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 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 $0.00104 $0.00724
Opus 5 $0.00052 $0.00362
Sonnet 5 $0.00021 $0.00145
Haiku 4.5 $0.00010 $0.00072

Measured 10d ago against content hash a469b4efcf87, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

REPLACE-with-skill-name 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 10d 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.

templates/skill-template/SKILL.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

()

<One paragraph: what this board is, and what the reference files hold. Say explicitly that the detail lives in the reference files and should be read rather than guessed at.>

  • reference/board-hardware.md
  • reference/recipes.md
  • template/ — a complete working project that builds and flashes, plus a scaffolding script.

Orientation

MCU <part number, core, flash, RAM, package>
Clocks <crystals populated, and the clock tree that is known to work>
Display <controller, resolution, bus, pins>
LED / button <pin and polarity for each>
Storage <internal / external flash, SD, PSRAM, with addresses>
USB <peripheral, pins, bootloader behaviour>
Debug <SWD/JTAG/UART header and pins>

<Delete rows that don't apply; add rows the board needs.>

Rules that prevent the expensive mistakes

<10–15 numbered rules from your bring-up log. Each is imperative and carries its consequence. Template for one entry:>

  1. <the setting, in code form> — . Without it, <the symptom, which should not obviously point back at this setting>.

When the task is

<The one or two areas where the naive approach is badly wrong. Give the mechanism and the numbers, so the model can generalise past the case you wrote down. Delete if the board has none.>

Starting a new project

Do not hand-assemble one. template/ is a verified-working project — scaffold from it:

~/.claude/skills/<skill-name>/template/variants/new-project.sh <target-dir> [--full|--minimal]
cd <target-dir> && <build command>
  • --full (default) — . .
  • --minimal — . . Use it to prove the toolchain and the flashing route before adding anything.

When the user already has a project, prefer bringing it in line with the template's <config file> over rewriting their code.

Read the full file on GitHub · 73 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. 10d ago First seen · 73 lines · 104 tokens per session scan A a469b4efcf87

Subscribe to this mod's changes

REPLACE-with-skill-name is a skill published in the GitHub repository alexex1993/mcu-skills (17 stars, last pushed 7d ago), licensed MIT. It adds 104 tokens to every session and 724 once invoked, about $0.0005 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.

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