C8Y Client Breaking Changelog

Log breaking changes in the Cumulocity IoT client library.

5|Updated Jan 29, 2026
One-click install
npx skills add https://github.com/Cumulocity-IoT/cumulocity-skills --skill c8y-client-breaking-changelog
Or copy as Structured Prompt for Agent
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Skill: C8Y Client Breaking Changelog
Source: https://github.com/Cumulocity-IoT/cumulocity-skills/tree/main/skills/c8y-client-breaking-changelog
Command: npx skills add https://github.com/Cumulocity-IoT/cumulocity-skills --skill c8y-client-breaking-changelog

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps developers stay informed about breaking changes in the Cumulocity IoT client library (@c8y/client), preventing unexpected issues during upgrades and migrations.

Core Features & Use Cases

  • Breaking Change Identification: Lists specific API changes that are not backward compatible.
  • Impact Analysis: Details affected client methods and provides clear action items for remediation.
  • Use Case: Before upgrading your Angular application to a new Cumulocity IoT Web SDK version, use this Skill to quickly understand which of your InventoryService or AlarmService calls might break and how to fix them.

Quick Start

Use the C8Y Client Breaking Changelog skill to review breaking changes for the Alarm API.

Frequently Asked Questions about C8Y Client Breaking Changelog

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I track breaking changes in the Cumulocity IoT client library?

Track breaking changes in the Cumulocity IoT client library by reviewing a curated log of API modifications, affected service methods, and required developer actions for seamless integration and migration. It details behavior-altering changes across various @c8y/client versions to prevent unexpected issues during upgrades.

What breaking changes affect the Alarm API in @c8y/client?

Breaking changes affecting the Alarm API in @c8y/client include specific REST API modifications and altered client-side method calls. The changelog details these behavior-altering updates and provides clear action items for remediation to ensure your AlarmService calls function correctly after an SDK upgrade.

How do I migrate Angular applications to a new Cumulocity IoT Web SDK version?

Migrate Angular applications to a new Cumulocity IoT Web SDK version by identifying non-backward-compatible API changes within @c8y/client. The changelog provides impact analysis for client methods, outlining required developer actions to fix breaking calls in services like InventoryService before completing the upgrade.

Why does my InventoryService call break after a Cumulocity SDK upgrade?

Your InventoryService call breaks after a Cumulocity SDK upgrade due to non-backward-compatible API modifications in the @c8y/client library. The changelog identifies these specific REST API interaction changes and provides clear action items for remediating affected client-side method calls.

Does the C8Y Client Breaking Changelog cover all Cumulocity IoT REST API modifications?

The C8Y Client Breaking Changelog focuses specifically on breaking and behavior-altering changes impacting REST API interactions and client-side method calls within the @c8y/client library. It provides targeted impact analysis and remediation steps rather than documenting every minor REST API modification.