What is connectivity-ip?

Networking guidance for Zephyr RTOS, an operating system for small connected devices. It covers Internet protocols such as MQTT, CoAP, and LwM2M, plus network configuration and external library integration.

Use it when building connected IoT devices, selecting MQTT, CoAP, or LwM2M, configuring IPv4 or IPv6 and TCP or UDP, trimming network memory use, or integrating SDKs with West manifests.

It helps choose a suitable device-to-cloud protocol and reduce the memory used by networking. It also explains how to add cloud libraries as Zephyr modules.

connectivity-ip — Skill for Claude Code and Codex by beriberikix

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 beriberikix/zephyr-agent-skills --skill connectivity-ip

Clone the repo

git clone --depth 1 https://github.com/beriberikix/zephyr-agent-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/beriberikix/zephyr-agent-skills/connectivity-ip/github.svg)](https://agentmods.dev/skills/beriberikix/zephyr-agent-skills/connectivity-ip)

Your own site

<a href="https://agentmods.dev/skills/beriberikix/zephyr-agent-skills/connectivity-ip"><img src="https://agentmods.dev/badge/skills/beriberikix/zephyr-agent-skills/connectivity-ip/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/beriberikix/zephyr-agent-skills/connectivity-ip"><img src="https://agentmods.dev/badge/skills/beriberikix/zephyr-agent-skills/connectivity-ip.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 734 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	$0.00077	$0.00734
Opus 5	$0.00039	$0.00367
Sonnet 5	$0.00015	$0.00147
Haiku 4.5	$0.00008	$0.00073

Measured 11d ago against content hash 9849ce71788e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

connectivity-ip 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/net_config_audit.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.

skills/connectivity-ip/SKILL.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Zephyr Connectivity: IP Networking

Build memory-efficient, cloud-connected applications using Zephyr's modular IP stack and industry-standard IoT protocols.

Core Workflows

1. Protocol Selection

Choose the right protocol (LwM2M, CoAP, MQTT) based on your device's power and management needs.

Reference: protocol_selection.md
Key Tools: CONFIG_COAP, CONFIG_LWM2M, CONFIG_MQTT_LIB.

2. IP Stack Configuration

Tune the networking stack to save Flash and RAM while ensuring reliable communication.

Reference: ip_stack_config.md
Key Tools: CONFIG_NET_IPV4, CONFIG_NET_BUF_RX_COUNT, DNS resolver.

3. SDK & Module Integration

Integrate external cloud SDKs and libraries as first-class Zephyr modules.

Reference: sdk_module_integration.md
Key Tools: west.yml, zephyr/module.yml, name-allowlist.

Quick Start (Kconfig for CoAP)

# Minimal stack for CoAP over UDP
CONFIG_NETWORKING=y
CONFIG_NET_UDP=y
CONFIG_NET_IPV4=y
CONFIG_COAP=y
CONFIG_DNS_RESOLVER=y

Professional Patterns (Cloud Connectivity)

Extreme Trimming: Disable TCP and IPv6 if not strictly required to reclaim 10KB+ of RAM.
Manifest Control: Use an allow-list in your west.yml to prevent cloning hundreds of megabytes of unused vendor modules.
Async DNS: Use the asynchronous DNS resolver to prevent blocking the main application thread during host lookup.

Automation Tools

net_config_audit.py: Audit prj.conf networking flags for protocol/profile consistency.

Examples & Templates

prj_minimal_coap.conf: Starter footprint-trimmed CoAP-over-UDP configuration.

Validation Checklist

Device obtains network connectivity and resolves DNS for the configured backend.
Selected protocol path (CoAP, MQTT, or LwM2M) completes connect and message exchange.
Disabled stack features (for example IPv6 or TCP) are absent from final .config when trimmed.
RAM/Flash footprint meets the expected optimization target after stack tuning.

Read the full file on GitHub · 64 lines

Files

What ships with it

6 files 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.

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.

11d ago First seen · 64 lines · 77 tokens per session scan A 9849ce71788e

Subscribe to this mod's changes

connectivity-ip is a skill published in the GitHub repository beriberikix/zephyr-agent-skills (63 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 77 tokens to every session and 734 once invoked, about $0.0004 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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