Agent skill

Uart Serial Baremetal

by mohitmishra786 in mohitmishra786/low-level-dev-skills

Bare-metal UART skill for serial console and debug. An agent skill from mohitmishra786/low-level-dev-skills.

MITAuto-check passedDevelopment

Install Uart Serial Baremetal

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .claude/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .claude/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .agents/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .agents/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .cursor/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .cursor/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/mohitmishra786/low-level-dev-skills.git --path skills/baremetal/uart-serial-baremetal

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .gemini/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .gemini/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .github/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .github/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills uart-serial-baremetal --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/baremetal/uart-serial-baremetal .opencode/skills/uart-serial-baremetal && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "uart-serial-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/uart-serial-baremetal into .opencode/skills/uart-serial-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "uart-serial-baremetal", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: uart-serial-baremetal
GitHub stars: 252
Token cost: ~662 tokens
SKILL.md length: 144 words
Files: 1
Skills in repo: 138
Repo updated: Jun 27, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Bare-metal UART skill for serial console and debug. An agent skill from mohitmishra786/low-level-dev-skills.

Works in 5 steps: Baud rate (STM32) → Polling TX/RX → Interrupt-driven RX ring buffer → …
Configuring baud rate
SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Uart Serial Baremetal is an agent skill from mohitmishra786/low-level-dev-skills. Bare-metal UART skill for serial console and debug. Use when configuring baud rate, polling or IRQ-driven TX/RX, or integrating DMA with UART. Activates on queries about UART bare-metal, baud BRR, serial printf, or USART interrupt.

Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.

When your agent uses it

Configuring baud rate
IRQ-driven TX/RX
Integrating DMA with UART

Example prompts

“/uart-serial-baremetal”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Baud rate (STM32)
Polling TX/RX
Interrupt-driven RX ring buffer
retarget printf (newlib)
Agent usage

What it can do on your machine

Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are c).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Uart Serial Baremetal loads about 662 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 144 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~63
When it runs · the whole SKILL.md, loaded when a task matches: ~662

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 144 words, ~662 tokens.

Download SKILL.mdSave it as .claude/skills/uart-serial-baremetal/SKILL.md (or your agent's skills folder).

name: uart-serial-baremetal
description: Bare-metal UART skill for serial console and debug. Use when configuring baud rate, polling or IRQ-driven TX/RX, or integrating DMA with UART. Activates on queries about UART bare-metal, baud BRR, serial printf, or USART interrupt.

UART Serial (Bare-Metal)

Purpose

Implement UART/USART for debug console and device communication: baud rate calculation, 8N1 framing, polling and interrupt-driven I/O, overrun handling, and optional DMA basics.

When to Use

First printf/log output on new hardware
Serial protocol to sensor/module
Replacing blocking HAL_UART with minimal driver
Fixing garbled or missing characters

Workflow

1. Baud rate (STM32)

BRR = pclk / (16 * baud)   /* oversampling by 16 — check RM for USART */

void usart2_init(uint32_t pclk, uint32_t baud) {
    RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
    /* GPIO PA2/PA3 AF — see gpio-baremetal */

    USART2->BRR = pclk / baud;  /* simplified — RM has fractional formula */
    USART2->CR1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_UE;
}

Verify pclk from actual clock tree (SystemCoreClock, APB prescaler).

2. Polling TX/RX

void uart_putc(USART_TypeDef *u, char c) {
    while (!(u->SR & USART_SR_TXE))
        ;
    u->DR = (uint8_t)c;
}

char uart_getc(USART_TypeDef *u) {
    while (!(u->SR & USART_SR_RXNE))
        ;
    return (uint8_t)u->DR;
}

3. Interrupt-driven RX ring buffer

void USART2_IRQHandler(void) {
    if (USART2->SR & USART_SR_RXNE) {
        uint8_t b = USART2->DR;
        rb_push(&rx_rb, b);
    }
    if (USART2->SR & USART_SR_ORE) {
        (void)USART2->DR;  /* clear overrun — required on STM32 */
    }
}

4. retarget `printf` (newlib)

int _write(int fd, char *ptr, int len) {
    (void)fd;
    for (int i = 0; i < len; i++)
        uart_putc(USART2, ptr[i]);
    return len;
}

Link with --specs=nosys.specs or provide full syscalls.

5. Agent usage

/uart-serial-baremetal Calculate USART BRR for 115200 at 84 MHz PCLK

Common Problems

Symptom	Cause	Fix
Garbage chars	Wrong baud/PCLK	Recompute BRR; check APB divider
Lost bytes	ORE not cleared	Read DR on ORE; use IRQ + ringbuf
No output	TX pin not AF	GPIO alternate function
`printf` hangs	`_write` missing	Implement retarget

skills/baremetal/gpio-baremetal — TX/RX pin mux
skills/baremetal/interrupts-and-exceptions-baremetal — USART IRQ
skills/baremetal/dma-baremetal — UART RX DMA
skills/embedded/openocd-jtag — semihosting alternative

Files

Just SKILL.md in skills/baremetal/uart-serial-baremetal of mohitmishra786/low-level-dev-skills.

Open the folder on GitHubat commit bdc5847

Compare with similar skills

Uart Serial Baremetal next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Uart Serial Baremetal compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Uart Serial Baremetal this skillmohitmishra786/low-level-dev-skills	252	—	~662	Automated safety check: Pass	MIT	3 mo ago
Vercel Composition Patternssupabase/supabase	111k	58 repos	~726	Automated safety check: Pass	MIT	today
Finishing a Development Branchobra/superpowers	297k	5 repos	~1.9k	Automated safety check: Pass	MIT	today
Typescript Advanced Typesrolling-scopes/rsschool-app	10k	25 repos	~4.2k	Automated safety check: Pass	MPL-2.0	5 days ago
PR Babysitteropeninterpreter/openinterpreter	69k	3 repos	~4.2k	Automated safety check: Pass	Apache-2.0	3 days ago
Code Review ChecklistshareAI-lab/learn-claude-code	78k	4 repos	~1.1k	Automated safety check: Pass	MIT	11 days ago

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Questions about Uart Serial Baremetal

What does Uart Serial Baremetal do?

Bare-metal UART skill for serial console and debug. An agent skill from mohitmishra786/low-level-dev-skills. Uart Serial Baremetal is an agent skill from mohitmishra786/low-level-dev-skills. Bare-metal UART skill for serial console and debug.

When should I use Uart Serial Baremetal?

Uart Serial Baremetal fits situations like: configuring baud rate; IRQ-driven TX/RX; integrating DMA with UART.

How do I install Uart Serial Baremetal in Claude Code?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a claude-code`. Or copy the skill folder (skills/baremetal/uart-serial-baremetal in mohitmishra786/low-level-dev-skills) into .claude/skills/uart-serial-baremetal in your project. Claude Code loads it when a task matches its description.

How do I install Uart Serial Baremetal in Codex?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a codex`. Or copy the skill folder (skills/baremetal/uart-serial-baremetal in mohitmishra786/low-level-dev-skills) into .agents/skills/uart-serial-baremetal in your project. Codex loads it when a task matches its description.

Can I use Uart Serial Baremetal in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill uart-serial-baremetal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/uart-serial-baremetal, .gemini/skills/uart-serial-baremetal, .github/skills/uart-serial-baremetal and .opencode/skills/uart-serial-baremetal in your project.

What does Uart Serial Baremetal need to run?

SKILL.md names no scripts, command-line tools or credentials: Uart Serial Baremetal is instructions for the agent only.

Does Uart Serial Baremetal access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Uart Serial Baremetal safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Uart Serial Baremetal use?

Uart Serial Baremetal is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Uart Serial Baremetal use?

About 662 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Uart Serial Baremetal?

Skills that share tags, products or a category with Uart Serial Baremetal: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Uart Serial Baremetal?

mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 252 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.

Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Uart Serial Baremetal

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

UART Serial (Bare-Metal)

Purpose

When to Use

Workflow

1. Baud rate (STM32)

2. Polling TX/RX

3. Interrupt-driven RX ring buffer

4. retarget printf (newlib)

5. Agent usage

Common Problems

Related Skills

Files

Compare with similar skills

Similar skills

More from mohitmishra786/low-level-dev-skills

Related

Questions about Uart Serial Baremetal

4. retarget `printf` (newlib)