Craft Cloud — Serverless Hosting for Craft CMS

Reference for Craft Cloud, Pixel & Tonic's serverless hosting platform for Craft CMS. Covers the craft-cloud.yaml config file, the Build → Migrate → Release deploy pipeline, the craftcms/cloud extension, edge image transforms and static caching, the Cloud filesystem, plugin Cloud-compatibility requirements, and self-hosted → Cloud migration.

This skill is scoped to Craft Cloud specifically — what's different on Cloud vs running Craft yourself on Forge, Servd, or bare metal. For Servd, see the servd skill. For generic Craft deployment (build artifacts, project config sync, atomic deploys on traditional hosts), see the craftcms skill's deployment.md.

Companion Skills — Load When Needed

• craftcms — When the Cloud topic intersects plugin or module PHP work (e.g. App::isEphemeral() guards in services, asset-bundle constraints, queue job design for the 15-minute cap).
• craft-site — When Cloud intersects front-end templating (ESI islands inside cached pages, edge image transform usage, {% expires %} opt-outs for static caching).
• ddev — For the local-dev parity recipe (matching PHP/DB versions, simulating the ephemeral filesystem locally).
• craft-php-guidelines — When editing plugin PHP to add Cloud-compatibility checks.

Documentation

Authoritative sources used to write this skill: