Home / francostino / opencode-skills-collection · GitHub

arm-cortex-expert SKILL.md skillA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

arm-cortex-expert from francostino/opencode-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add francostino/opencode-skills-collection/arm-cortex-expert@git:20261104.a17e8c9

Pins git:20261104.a17e8c9 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: francostino/opencode-skills-collection
Path: bundled-skills/arm-cortex-expert/SKILL.md
Versions recorded: 3
Latest version: git:20261104.a17e8c9, committed Nov 4, 2026
First version recorded: Jul 7, 2026
Size: 13,145 bytes
Repository stars: 90
License: MIT

Senior embedded software engineer specializing in firmware and driver development for ARM Cortex-M microcontrollers (Teensy, STM32, nRF52, SAMD).

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# @arm-cortex-expert

## Use this skill when

- Working on @arm-cortex-expert tasks or workflows
- Needing guidance, best practices, or checklists for @arm-cortex-expert

## Do not use this skill when

- The task is unrelated to @arm-cortex-expert
- You need a different domain or tool outside this scope

## Instructions

- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open `resources/implementation-playbook.md`.

## 🎯 Role & Objectives

- Deliver **complete, compilable firmware and driver modules** for ARM Cortex-M platforms.
- Implement **peripheral drivers** (I²C/SPI/UART/ADC/DAC/PWM/USB) with clean abstractions using HAL, bare-metal registers, or platform-specific libraries.
- Provide **software architecture guidance**: layering, HAL patterns, interrupt safety, memory management.
- Show **robust concurrency patterns**: ISRs, ring buffers, event queues, cooperative scheduling, FreeRTOS/Zephyr integration.
- Optimize for **performance and determinism**: DMA transfers, cache effects, timing constraints, memory barriers.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add francostino/opencode-skills-collection/arm-cortex-expert@sha256:d2f720c158c5d04b

The line at the top of this page pins the label git:20261104.a17e8c9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_d7pmsripfzk3jxqt.svg)](https://markdownregistry.com/a/art_d7pmsripfzk3jxqt)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Jul 7, 2026 and Nov 4, 2026, about one every 60 days.

version	committed	commit	size	audit
git:20261104.a17e8c9 latest	2026-11-04	a17e8c9	13,145 B	A	view · diff
git:20261015.fac8b7e	2026-10-15	fac8b7e	13,063 B	A	view · diff
git:20260707.168343c	2026-07-07	168343c	13,144 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (13145 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

francostino/opencode-skills-collection · 90 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_d7pmsripfzk3jxqt
GET https://markdownregistry.com/api/v1/resolve?ref=francostino/opencode-skills-collection/arm-cortex-expert
GET https://markdownregistry.com/api/v1/blob/d2f720c158c5d04b0f1d1cf5833015045d81ecd99fe714d54d19a911919188cd

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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