What is lwip-integration?

Embedded-networking guidance for integrating and debugging lwIP, a small TCP/IP networking stack used in devices and real-time operating systems.

Use it for Ethernet, Wi-Fi, PPP, or SLIP projects involving DHCP, TCP, UDP, packet buffers, memory pools, or packet loss.

It helps separate hardware drivers, network-interface code, memory handling, threads, and protocol settings so networking faults are easier to isolate.

lwip-integration — Skill for Claude Code and Codex by easyzoom

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.

Any agent

npx skills add easyzoom/aix-skills --skill lwip-integration

Clone the repo

git clone --depth 1 https://github.com/easyzoom/aix-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/easyzoom/aix-skills/lwip-integration/github.svg)](https://agentmods.dev/skills/easyzoom/aix-skills/lwip-integration)

Your own site

<a href="https://agentmods.dev/skills/easyzoom/aix-skills/lwip-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/lwip-integration/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/easyzoom/aix-skills/lwip-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/lwip-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 859 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00042	$0.00859
Opus 5	$0.00021	$0.00430
Sonnet 5	$0.00008	$0.00172
Haiku 4.5	$0.00004	$0.00086

Measured 10d ago against content hash 56ed5cca9f93, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

lwip-integration 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 10d 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/lwip-integration/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

lwIP Integration

Overview

Use this skill to integrate lwIP by separating hardware Ethernet/Wi-Fi drivers, netif glue, memory pools, threading model, and protocol configuration. A successful port proves link, IP configuration, packet RX/TX, and resource stability under load.

When To Use

Use this skill when:

The user wants to add or debug lwIP on bare metal, FreeRTOS, RT-Thread, Zephyr, vendor SDKs, or custom network drivers.
The issue involves lwipopts.h, sys_arch, netif, DHCP, TCP/UDP, pbufs, memory pools, packet loss, or hard faults in networking.
The target uses Ethernet, Wi-Fi, PPP, SLIP, or a vendor network interface.

Do not use this skill when the physical link or board interface is not proven. Use hardware-interface-debug first for PHY, RMII/MII, clocks, or wiring issues. For FreeRTOS-native TCP/IP, use freertos-plus-tcp-integration. For MQTT over lwIP, use mqtt-embedded-integration after basic connectivity works.

First Questions

Ask for:

MCU/SoC, network interface, PHY/module, RTOS, and lwIP version.
Driver source: vendor SDK, custom MAC driver, Wi-Fi module, or simulator.
Threading model: NO_SYS raw API, tcpip_thread, socket/netconn API, or RTOS integration.
lwipopts.h, memory sizes, pbuf pool settings, and enabled protocols.
Current symptom: no link, no IP, DHCP timeout, ping fails, TCP stalls, memory exhaustion, or crash.
Packet/log evidence: link status, IP address, ARP, ping, Wireshark, counters, or asserts.

Integration Checklist

Confirm link before IP. Verify PHY/module link, MAC address, link callbacks, and carrier status before debugging DHCP or TCP.
Confirm netif glue. netif_add, input path, output path, MTU, flags, hostname, and link/status callbacks must match the driver.
Match threading model. Do not call raw API from arbitrary threads. Use tcpip callbacks or socket/netconn APIs according to configuration.
Size memory deliberately. Check MEM_SIZE, MEMP_NUM_*, PBUF_POOL_SIZE, TCP windows, mailbox sizes, and stack sizes.

Read the full file on GitHub · 85 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.

10d ago First seen · 85 lines · 42 tokens per session scan A 56ed5cca9f93

Subscribe to this mod's changes

lwip-integration is a skill published in the GitHub repository easyzoom/aix-skills (31 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 859 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 2026-08-30.

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