zephyr-rtos

Development

Specialized skill for Zephyr RTOS development and configuration

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How to use this skill

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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/embedded-systems/skills/zephyr-rtos/SKILL.md

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Zephyr RTOS Skill

Overview

This skill provides specialized support for Zephyr RTOS development, including device tree configuration, Kconfig management, and integration with Zephyr's extensive subsystems.

Capabilities

Build System

West build system operation and configuration
CMake integration and customization
Multi-image builds (MCUboot + app)
Sysbuild configuration
Custom board definitions

Device Tree

Device tree overlay generation
Binding creation and modification
Node property configuration
Pinctrl and GPIO configuration
Compatible string management

Kconfig Management

Kconfig option configuration
Fragment file organization
Configuration dependency analysis
Board-specific defconfig
Application-specific prj.conf

Networking Stack

TCP/IP stack configuration
Socket API setup
Network interface configuration
MQTT, CoAP, LwM2M protocols
Network shell commands

Bluetooth Stack

Bluetooth LE configuration
GATT service definition
Bluetooth Mesh setup
Connection management
Advertising configuration

Power Management

Power management framework configuration
Device power states
System power states
Policy configuration

Logging and Shell

Logging backend configuration
Log level management
Shell command registration
RTT and UART backends

Secure Boot

MCUboot integration
Signed image generation
Upgrade slot configuration
Hardware security integration

Target Processes

rtos-integration.js - Zephyr RTOS setup and integration
secure-boot-implementation.js - MCUboot and secure boot
ota-firmware-update.js - Firmware update with MCUboot
low-power-design.js - Zephyr power management

Dependencies

Zephyr SDK
West meta-tool
Device tree compiler (dtc)
CMake and Ninja

Usage Context

This skill is invoked when tasks require:

Zephyr project setup and configuration
Device tree customization
Networking or Bluetooth stack setup
Power management implementation
Secure boot with MCUboot

Example Configurations

Basic Project Structure

app/
  CMakeLists.txt
  prj.conf
  boards/
    my_board.overlay
  src/
    main.c

Device Tree Overlay

&i2c0 {
    status = "okay";
    clock-frequency = <I2C_BITRATE_FAST>;

    sensor@48 {
        compatible = "ti,tmp102";
        reg = <0x48>;
    };
};

Kconfig Fragment

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="My Device"
CONFIG_BT_GATT_DYNAMIC_DB=y