backstage/.changeset/3066.md

@backstage/plugin-catalog-backend

@backstage/plugin-catalog-backend
minor

Filters passed to the /entities endpoint of the catalog has changed format.

The old way was to pass things on the form ?a=b&c=d; the new way is to pass things on the form ?filter=a=b,c=d. See discussion in #2910 for details.

The comma separated items within a single filter have an AND between them. If multiple such filters are passed, they have an OR between those item groups.