diff --git a/.changeset/css-exports-support.md b/.changeset/css-exports-support.md
new file mode 100644
index 0000000000..69e7808ccc
--- /dev/null
+++ b/.changeset/css-exports-support.md
@@ -0,0 +1,5 @@
+---
+'@backstage/cli': minor
+---
+
+Added support for CSS exports in package builds. When a package declares a CSS file in its `exports` field, the CLI will now automatically bundle it during `backstage-cli package build` using lightningcss, and rewrite the export path from `src/` to `dist/` at publish time. This allows packages to include standalone CSS files without custom build scripts.
diff --git a/.changeset/ui-standard-build.md b/.changeset/ui-standard-build.md
new file mode 100644
index 0000000000..d0d8bd7f65
--- /dev/null
+++ b/.changeset/ui-standard-build.md
@@ -0,0 +1,5 @@
+---
+'@backstage/ui': patch
+---
+
+Migrated to use the standard `backstage-cli package build` for CSS bundling instead of a custom build script.