openocd

A toolkit for programming and debugging microcontrollers through hardware probes such as ST-Link or CMSIS-DAP. OpenOCD can act as a GDB Server, allowing a debugger to inspect source code, registers, memory, breakpoints, and program execution.

In plain words
What is it for?
Use it to detect probes, flash or erase firmware, start a GDB Server, reset and control a target, debug through Telnet or GDB, inspect registers and memory, set breakpoints, and capture Semihosting or ITM output.
Why use it?
It combines firmware flashing, flash erasing, reset control, live debugging, and output capture in one workflow. This helps investigate both software behavior and low-level device state.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/zhinkgit/embeddedskills/openocd
Any agent
npx skills add zhinkgit/embeddedskills --skill openocd
Clone the repo
git clone --depth 1 https://github.com/zhinkgit/embeddedskills

Made for: Claude Code, Codex.

Per session 247 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,417 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00247 $0.04417
Opus 5 $0.00123 $0.02209
Sonnet 5 $0.00049 $0.00883
Haiku 4.5 $0.00025 $0.00442

Measured 2d ago against content hash 3fac6ece22de, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openocd 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 2d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (scripts/openocd_gdb_common.py, scripts/openocd_gdb.py, scripts/openocd_itm.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

openocd/SKILL.md · 347 lines

How it starts

The opening of the file, as written. The whole thing — 347 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenOCD 下载与调试

本 skill 提供 OpenOCD 的探针探测、固件烧录、Flash 擦除、GDB Server 启动、目标复位、 Telnet 在线调试、GDB 源码级调试和 Semihosting 输出捕获能力。

配置

环境级配置(skill/config.json)

skill 目录下的 config.json 包含环境级配置(工具路径、端口号等),首次使用前确认 exe 路径正确:

{
  "exe": "openocd",
  "scripts_dir": "",
  "gdb_port": 3333,
  "telnet_port": 4444,
  "gdb_exe": "",
  "operation_mode": 1
}
  • exe:openocd.exe 路径或命令名(必填)
  • scripts_dir:OpenOCD 配置脚本目录,为空时使用 OpenOCD 内置路径
  • gdb_port:GDB Server 端口,默认 3333
  • telnet_port:Telnet 端口,默认 4444
  • gdb_exe:arm-none-eabi-gdb 路径,GDB 调试子命令(run/backtrace/locals)需要
  • operation_mode1 直接执行 / 2 输出风险摘要但不阻塞 / 3 执行前确认

工程级配置(.embeddedskills/config.json)

board/interface/target 等工程参数统一在工作区的 .embeddedskills/config.json 中管理:

{
  "openocd": {
    "board": "",
    "interface": "interface/stlink.cfg",
    "target": "target/stm32f4x.cfg",
    "adapter_speed": "4000",
    "transport": "swd",
    "tpiu_name": "stm32f4x.tpiu",
    "traceclk": "168000000",
    "pin_freq": "2000000"
  }
}
  • board:board 配置(如 board/stm32f4discovery.cfg),优先级高于 interface+target
  • interface:interface 配置(如 interface/stlink.cfg
  • target:target 配置(如 target/stm32f4x.cfg
  • adapter_speed:调试速率 kHz
  • transport:传输协议(swd/jtag)
  • tpiu_name / traceclk / pin_freq:ITM/SWO 观测所需的 TPIU 参数

参数解析优先级:CLI 显式参数 > .embeddedskills/config.json(工程级)> skill/config.json(环境级)> .embeddedskills/state.json > 默认值/报错

成功执行后,确认过的参数会自动写回工程配置。

子命令

基础操作

子命令 用途 风险
probe 验证 board 或 interface+target 组合,探测目标连通性
flash 烧录固件(.elf / .hex / .bin)
erase 擦除目标 Flash
reset / reset-init 复位目标芯片
targets / flash-banks / adapter-info 查询底层 target / flash / adapter 信息
raw 执行受控 OpenOCD 原生命令

GDB Server

子命令 用途 风险
gdb-server 启动 GDB Server,保持运行等待 GDB 连接
gdb backtrace/locals 快捷获取调用栈和局部变量
gdb break/continue/next/step/finish/until one-shot 执行流控制
gdb frame/print/watch/disassemble/threads/crash-report one-shot 源码级诊断

Read the full file on GitHub · 347 lines

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. 2d ago First seen · 347 lines · 247 tokens per session scan A 3fac6ece22de

Subscribe to this mod's changes

openocd is a skill published in the GitHub repository zhinkgit/embeddedskills (610 stars, last pushed 13d ago), licensed MIT. It adds 247 tokens to every session and 4,417 once invoked, about $0.0012 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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