Troubleshooting

Start by identifying which boundary failed:

Symptom	Check first
Component missing from the library	Catalog registration and definitions
Component id does not render	Installed inventory and source prefix
Editor chrome is unstyled	Stylesheet imports and Tailwind
Published output differs	Catalog version and host theme
Save returns 409	Document revision
Copilot invents components	Prompt catalog scope and validation

Collect the current catalog inventory:

npx dollie-editor info --json

Then reduce the page to one known section and test editing, serialization, validation, and rendering in that order.