Release Note 🎉

🤖 AI Agent Ready & MQTT 5.0 Subscription Properties

This release brings out-of-the-box AI coding agent support to MQTTX CLI (Claude Code, Codex, Cursor, etc.), MQTT 5.0 user properties for subscriptions, Korean language support, a GPU acceleration toggle, and security fixes including XSS prevention.

AI Agent Support 🤖

MQTTX CLI now works out of the box with AI coding agents — Claude Code, Codex, Cursor, etc.

Step 1 · Install the CLI — just paste this prompt to your agent:

Read https://raw.githubusercontent.com/emqx/MQTTX/main/INSTALL.md and follow its instructions to install or update MQTTX CLI. Verify the executable path and version.

Step 2 · Add the MQTTX CLI Skill — one command:

npx skills add emqx/MQTTX --skill mqttx-cli

Done. Now try: "Verify a publish/subscribe round trip against my local broker using mqttx-cli."

Features 🌈

Desktop,Web:

• Support MQTT 5.0 user properties for subscriptions — inspect them from the subscription list and hover topic tooltip.
• Enhance data export with message-based progress tracking.

Desktop:

• Add Korean (ko) language support.
• Add configurable GPU (hardware) acceleration toggle.

Web:

• Add collapsible connections list pane.

CLI:

• Add received_at timestamp for received messages.

Fixes 🛠

Desktop,Web:

• Fix XSS vulnerability by escaping MQTT topic and payload rendering.
• Preserve subscription user properties across editor flows and sync MQTT 5.0 properties on re-subscribe.
• Fix duplicate data export and optimize CSV/Excel export format.
• Add missing translations for Turkish, Japanese, and Hungarian.

Desktop:

• Show edit-failed feedback when a connection update fails (surface TypeORM errors properly).

What's Changed

• fix: resolve duplicate data, optimize csv/excel export, and fix progress bar by @ni00 in https://github.com/emqx/MQTTX/pull/2015
• feat(web): add collapsible connections list pane (desktop icon pattern) by @deviationist in https://github.com/emqx/MQTTX/pull/2049
• feat: add configurable GPU acceleration toggle by @ysfscream in https://github.com/emqx/MQTTX/pull/2037
• fix(security): escape MQTT topic and payload rendering to prevent XSS by @ysfscream in https://github.com/emqx/MQTTX/pull/2063
• fix(lang): correct Ja key casing in connections locale by @49EHyeon42 in https://github.com/emqx/MQTTX/pull/2058
• fix(copilot): add missing mcpConnectionFailed i18n key by @49EHyeon42 in https://github.com/emqx/MQTTX/pull/2057
• feat(cli): Add recevied_at timestamp for received messages by @iarenaza in https://github.com/emqx/MQTTX/pull/2053
• feat(lang): add Korean (ko) language support by @49EHyeon42 in https://github.com/emqx/MQTTX/pull/2056
• fix(database): surface typeorm errors in ConnectionService.update so UI can show editfailed by @calebcgates in https://github.com/emqx/MQTTX/pull/2046
• feat(connections): support MQTT 5.0 user properties for subscriptions by @ysfscream in https://github.com/emqx/MQTTX/pull/2066
• 1.13.1 by @ysfscream in https://github.com/emqx/MQTTX/pull/2068
• docs(cli): add agent installation guide and mqttx cli skill by @ni00 in https://github.com/emqx/MQTTX/pull/2067

New Contributors

• @deviationist made their first contribution in https://github.com/emqx/MQTTX/pull/2049
• @49EHyeon42 made their first contribution in https://github.com/emqx/MQTTX/pull/2058
• @iarenaza made their first contribution in https://github.com/emqx/MQTTX/pull/2053
• @calebcgates made their first contribution in https://github.com/emqx/MQTTX/pull/2046

Full Changelog: https://github.com/emqx/MQTTX/compare/v1.13.0...v1.13.1