openocd-mcp-debug

openocd-mcp-debug is a skill for Claude Code, Codex from luiox/openocd-mcp. It costs 101 tokens per session (4,149 once invoked), scanned A, original, MIT.

A tool that lets an AI agent flash firmware and debug embedded devices through OpenOCD and GDB, the tools commonly used to program and inspect microcontrollers.

In plain words
What is it for?
Use it to load firmware, start or stop debugging, inspect program state, and read runtime logs from supported embedded projects.
Why use it?
It brings device programming, breakpoints, debugger sessions, and real-time logs into an agent-controlled workflow using the project's existing VS Code launch settings.

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/luiox/openocd-mcp/openocd-mcp-debug
Any agent
npx skills add luiox/openocd-mcp --skill openocd-mcp-debug
Clone the repo
git clone --depth 1 https://github.com/luiox/openocd-mcp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for openocd-mcp-debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/luiox/openocd-mcp/openocd-mcp-debug.svg)](https://agentmods.dev/skills/luiox/openocd-mcp/openocd-mcp-debug)
Your own site
<a href="https://agentmods.dev/skills/luiox/openocd-mcp/openocd-mcp-debug"><img src="https://agentmods.dev/badge/skills/luiox/openocd-mcp/openocd-mcp-debug.svg" alt="Measured on agentmods" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,149 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 $0.00101 $0.04149
Opus 5 $0.00051 $0.02074
Sonnet 5 $0.00020 $0.00830
Haiku 4.5 $0.00010 $0.00415

Measured 4d ago against content hash 71045864abbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openocd-mcp-debug 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 4d 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.

skills/openocd-mcp-debug/SKILL.md · 409 lines

How it starts

The opening of the file, as written. The whole thing — 409 lines — stays where its author put it; the contents beside it link to each section on GitHub.

openocd-mcp Embedded Debug Skill

Project Overview

openocd-mcp is a fastmcp-based MCP server that wraps OpenOCD flashing and GDB debugging workflows into AI-callable tools. It reuses the project's existing .vscode/launch.json as the debug target source, requiring no extra configuration.

Property Description
Repository D:\GitHub_Repository\openocd-mcp
Installation uv tool install . or uv tool install git+https://github.com/luiox/openocd-mcp.git
Run mode stdio (default, VS Code MCP) / SSE (--sse --host 127.0.0.1 --port 9000)
Protocol GDB/MI2 async protocol (--interpreter=mi2), event-driven, no polling
Dependencies OpenOCD + arm-none-eabi-gdb
Platforms Windows / Linux / macOS

Core Architecture

AI Client → MCP Protocol → openocd-mcp
                               ├── ProjectConfigManager (parses launch.json)
                               ├── OpenOCDController (start/stop OpenOCD process)
                               ├── GDBMISession (MI2 async protocol communication)
                               ├── RTTClient (real-time log reading)
                               └── DebugSessionManager (coordinates lifecycle)

MCP Tool Complete Reference

All tools return strings by default. On failure, the response starts with "Error: ".

Project & Configuration

Tool Description Typical Usage
set_project(project_dir) Load project .vscode/launch.json set_project(project_dir="d:/path/to/project")
refresh_debug_targets() Reload launch.json configurations Use after modifying launch.json
get_runtime_config() View current OpenOCD/GDB paths and their sources Use when troubleshooting path issues

Flash & Debug Lifecycle

Tool Description Typical Usage
flash_download(config_name, firmware_path?) One-time firmware flash (no debug session) flash_download(config_name="Launch (DAP)")
debug_start(config_name, firmware_path?) Start a debug session debug_start(config_name="Launch (DAP)")
debug_stop() Stop the debug session debug_stop()

Read the full file on GitHub · 409 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. 4d ago First seen · 409 lines · 101 tokens per session scan A 71045864abbe

Subscribe to this mod's changes

openocd-mcp-debug is a skill published in the GitHub repository luiox/openocd-mcp (8 stars, last pushed 3mo ago), licensed MIT. It adds 101 tokens to every session and 4,149 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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