backstage/.changeset/techdocs-addons-api-migration-react.md

@backstage/plugin-techdocs-react

@backstage/plugin-techdocs-react
patch

TechDocs addons in the new frontend system now use a Utility API pattern instead of multiple attachment points. The AddonBlueprint now uses this new approach, and while addons created with older versions still work, they will produce a deprecation warning and will stop working in a future release.

As part of this change, the techDocsAddonDataRef alpha export was removed.