diff --git a/.changeset/curly-cars-relax.md b/.changeset/curly-cars-relax.md
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+---
+'@backstage/plugin-catalog-react': patch
+'@backstage/plugin-search-react': patch
+'@backstage/plugin-catalog': patch
+---
+
+Deprecate the old pattern of `create*Extension`, and replace it with the equivalent Blueprint implementation instead.