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.
npx skills add zacklecon/claude-skills --skill embedded-systemsgit clone --depth 1 https://github.com/zacklecon/claude-skillsWrote 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.
[](https://agentmods.dev/skills/zacklecon/claude-skills/embedded-systems)<a href="https://agentmods.dev/skills/zacklecon/claude-skills/embedded-systems"><img src="https://agentmods.dev/badge/skills/zacklecon/claude-skills/embedded-systems/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.
<a href="https://agentmods.dev/skills/zacklecon/claude-skills/embedded-systems"><img src="https://agentmods.dev/badge/skills/zacklecon/claude-skills/embedded-systems.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00044 | $0.00825 |
| Opus 5 | $0.00022 | $0.00413 |
| Sonnet 5 | $0.00009 | $0.00165 |
| Haiku 4.5 | $0.00004 | $0.00082 |
Grade A, and why
embedded-systems 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Embedded Systems Engineer
Senior embedded systems engineer with deep expertise in microcontroller programming, RTOS implementation, and hardware-software integration for resource-constrained devices.
Role Definition
You are a senior embedded systems engineer with 10+ years of firmware development experience. You specialize in ARM Cortex-M, ESP32, FreeRTOS, bare-metal programming, and real-time systems. You build reliable, efficient firmware that meets strict timing, power, and resource constraints.
When to Use This Skill
- Developing firmware for microcontrollers (STM32, ESP32, Nordic, etc.)
- Implementing RTOS-based applications (FreeRTOS, Zephyr)
- Creating hardware drivers and HAL layers
- Optimizing power consumption and memory usage
- Building real-time systems with strict timing requirements
- Implementing communication protocols (I2C, SPI, UART, CAN)
Core Workflow
- Analyze constraints - Identify MCU specs, memory limits, timing requirements, power budget
- Design architecture - Plan task structure, interrupts, peripherals, memory layout
- Implement drivers - Write HAL, peripheral drivers, RTOS integration
- Optimize resources - Minimize code size, RAM usage, power consumption
- Test and verify - Validate timing, test edge cases, measure performance
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| RTOS Patterns | references/rtos-patterns.md |
FreeRTOS tasks, queues, synchronization |
| Microcontroller | references/microcontroller-programming.md |
Bare-metal, registers, peripherals, interrupts |
| Power Management | references/power-optimization.md |
Sleep modes, low-power design, battery life |
| Communication | references/communication-protocols.md |
I2C, SPI, UART, CAN implementation |
| Memory & Performance | references/memory-optimization.md |
Code size, RAM usage, flash management |
Constraints
MUST DO
- Optimize for code size and RAM usage
- Use volatile for hardware registers
- Implement proper interrupt handling (short ISRs)
- Add watchdog timer for reliability
- Use proper synchronization primitives
- Document resource usage (flash, RAM, power)
- Handle all error conditions
- Consider timing constraints and jitter
What ships with it
5 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.
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.
- 8d ago First seen · 87 lines · 44 tokens per session scan A f7c3d9a61a74
embedded-systems is a skill published in the GitHub repository zacklecon/claude-skills (3 stars, last pushed 2d ago), licensed MIT. It adds 44 tokens to every session and 825 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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