This handles unit testing for Umbraco backoffice extensions built with Lit and Web Components, using the @open-wc/testing framework. You get two approaches: full integration with Umbraco's context system for testing real component behavior, or a mock-based setup that's simpler and faster when you just need to test state logic and observables in isolation. The documentation is thorough about the import path gotchas (dist-cms versus dist/packages trips people up) and includes working examples from the tree-example extension. If you're building custom property editors or workspace components, this gives you the test infrastructure to catch rendering bugs and state management issues before they hit the backoffice.
npx -y skills add umbraco/umbraco-cms-backoffice-skills --skill umbraco-unit-testing --agent claude-codeInstalls into .claude/skills of the current project.
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wshobson/agents
dbt-labs/dbt-agent-skills
github/awesome-copilot