diff --git a/.changeset/light-trainers-allow.md b/.changeset/light-trainers-allow.md
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+---
+'@backstage/backend-common': patch
+'@backstage/config': patch
+'@backstage/config-loader': patch
+'@backstage/plugin-app-backend': patch
+---
+
+Loading of app configurations now reference the `@deprecated` construct from
+JSDoc to determine if a property in-use has been deprecated. Users are notified
+of deprecated keys in the format:
+
+```txt
+The configuration key 'catalog.processors.githubOrg' of app-config.yaml is deprecated and may be removed soon. Configure a GitHub integration instead.
+```
+
+When the `withDeprecatedKeys` option is set to `true` in the `process` method
+of `loadConfigSchema`, the user will be notified that deprecated keys have been
+identified in their app configuration.
+
+The `backend-common` and `plugin-app-backend` packages have been updated to set
+`withDeprecatedKeys` to true so that users are notified of deprecated settings
+by default.