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 bahaabdelwahed/embedded-claude-plugin --skill peripheral-configgit clone --depth 1 https://github.com/bahaabdelwahed/embedded-claude-pluginWrote 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/bahaabdelwahed/embedded-claude-plugin/peripheral-config)<a href="https://agentmods.dev/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config"><img src="https://agentmods.dev/badge/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config/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/bahaabdelwahed/embedded-claude-plugin/peripheral-config"><img src="https://agentmods.dev/badge/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config.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 | $0.00105 | $0.01310 |
| Opus 5 | $0.00053 | $0.00655 |
| Sonnet 5 | $0.00021 | $0.00262 |
| Haiku 4.5 | $0.00011 | $0.00131 |
Grade A, and why
peripheral-config 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 9d 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 — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Peripheral Configuration Extraction
Extract register-level peripheral configuration procedures from STM32 reference manual and datasheet PDFs.
Universal Peripheral Initialization Pattern
Every STM32 peripheral follows this initialization order:
- Enable peripheral clock in RCC register (AHBxENR or APBxENR)
- Configure GPIO pins with correct alternate function (AF number from datasheet)
- Configure peripheral registers (mode, speed, protocol settings)
- Configure NVIC if using interrupts (priority, enable IRQ)
- Configure DMA if using DMA transfers (stream/channel, direction, sizes)
- Enable the peripheral (set enable bit in control register)
This order is critical. Accessing peripheral registers before enabling the clock causes a bus fault.
Where to Find Configuration Information
GPIO Alternate Function Mapping (Datasheet)
Glob pattern: docs/datasheet/*.pdf
- Read the ToC to find "Alternate function mapping" table
- This table shows which AF number (AF0-AF15) connects each GPIO pin to each peripheral
- Example: PA9 AF7 = USART1_TX, PA10 AF7 = USART1_RX
- This is the MOST REFERENCED table during development
Peripheral Register Descriptions (Reference Manual)
Glob pattern: docs/reference-manual/*.pdf
- Read ToC (pages 1-5) to find the peripheral chapter
- Each peripheral chapter contains:
- Functional description (how the peripheral works)
- Block diagram
- Configuration procedure (step-by-step)
- Register descriptions with bit fields
- Timing diagrams (for communication peripherals)
RCC Clock Enable Bits (Reference Manual)
- Find the "RCC" chapter
- Look for registers:
RCC_AHB1ENR,RCC_AHB2ENR,RCC_APB1ENR,RCC_APB2ENR - Each register has one bit per peripheral to enable its clock
- Know which bus the peripheral is on (AHB1/AHB2/APB1/APB2) to find the right register
NVIC and Interrupt Vectors
- Find the "Interrupts and events" chapter or "NVIC" section
- Contains the interrupt vector table with IRQ numbers
- Each peripheral's chapter also lists its interrupt sources
What ships with it
1 file 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.
- 9d ago First seen · 123 lines · 105 tokens per session scan A 0cf839d761dd
peripheral-config is a skill published in the GitHub repository bahaabdelwahed/embedded-claude-plugin (5 stars, last pushed 5mo ago), licensed MIT. It adds 105 tokens to every session and 1,310 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 2026-08-31.
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