Skill

domain-iot:mqtt-patterns

MQTT messaging patterns for IoT systems including topic hierarchy design, QoS level selection, retained messages, last will and testament, broker deployment, and MQTT 5.0 feature adoption.

Install

npx claudepluginhub rnavarych/alpha-engineer --plugin domain-iot

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This skill is limited to using the following tools:

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Preview

- Designing MQTT topic hierarchies for a new IoT system

Supporting Assets

references/brokers-and-mqtt5.mdreferences/topics-and-qos.md

SKILL.md

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Stats

Parent Repo Stars9

Parent Repo Forks0

Last CommitMar 3, 2026

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When to use

Designing MQTT topic hierarchies for a new IoT system

Choosing the right QoS level for telemetry, commands, or alerts

Implementing device presence detection with retained messages and LWT

Selecting or scaling an MQTT broker (Mosquitto, EMQX, HiveMQ, VerneMQ)

Adopting MQTT 5.0 features like shared subscriptions, message expiry, or user properties

Reviewing client library options for embedded C, Python, Node.js, Java, or Go

Core principles

Topic hierarchy is your ACL and filter contract — put the device ID early; flat topics destroy per-device access control and wildcard efficiency

QoS 1 is the sane default — deduplicate on the backend; QoS 2's four-way handshake costs more than it saves in most telemetry scenarios

LWT plus retained messages equals a free presence system — no polling, no heartbeat endpoint, broker handles it

MQTT 5.0 shared subscriptions replace every hand-rolled consumer group — load-balance backend processors without custom coordination

Never subscribe to # in production — you will receive everything on the broker; your consumer will not survive it

Reference Files

references/topics-and-qos.md — topic naming conventions, hierarchy patterns, QoS comparison table, retained messages, LWT configuration for device presence

references/brokers-and-mqtt5.md — broker selection (Mosquitto / EMQX / HiveMQ / VerneMQ), MQTT 5.0 feature guide, client libraries per language, anti-patterns to avoid

MQTT Patterns for IoT

When to use

Designing MQTT topic hierarchies for a new IoT system
Choosing the right QoS level for telemetry, commands, or alerts
Implementing device presence detection with retained messages and LWT
Selecting or scaling an MQTT broker (Mosquitto, EMQX, HiveMQ, VerneMQ)
Adopting MQTT 5.0 features like shared subscriptions, message expiry, or user properties
Reviewing client library options for embedded C, Python, Node.js, Java, or Go

Core principles

Topic hierarchy is your ACL and filter contract — put the device ID early; flat topics destroy per-device access control and wildcard efficiency
QoS 1 is the sane default — deduplicate on the backend; QoS 2's four-way handshake costs more than it saves in most telemetry scenarios
LWT plus retained messages equals a free presence system — no polling, no heartbeat endpoint, broker handles it
MQTT 5.0 shared subscriptions replace every hand-rolled consumer group — load-balance backend processors without custom coordination
Never subscribe to # in production — you will receive everything on the broker; your consumer will not survive it

Reference Files

references/topics-and-qos.md — topic naming conventions, hierarchy patterns, QoS comparison table, retained messages, LWT configuration for device presence
references/brokers-and-mqtt5.md — broker selection (Mosquitto / EMQX / HiveMQ / VerneMQ), MQTT 5.0 feature guide, client libraries per language, anti-patterns to avoid