From 9f403f17ba556f548cdf844cc8daa8cf4a73cd6f Mon Sep 17 00:00:00 2001
From: swiing <54545719+swiing@users.noreply.github.com>
Date: Thu, 11 Dec 2025 20:55:14 +0100
Subject: [PATCH 1/2] chore: simplify rollup.config.mjs

Since https://github.com/primer/react/pull/6425, the package only exports ESM modules. As a consequence, the rollup configuration does not need to export an array of configuration objects, and as yet another consequence, there is no need to define a base config that could be shared.

Refactor rollup configuration to export a simple default object directly instead of an array.
---
 packages/react/rollup.config.mjs | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/packages/react/rollup.config.mjs b/packages/react/rollup.config.mjs
index 81cf54a2938..e14c616a7cc 100644
--- a/packages/react/rollup.config.mjs
+++ b/packages/react/rollup.config.mjs
@@ -47,12 +47,20 @@ const postcssModulesOptions = {
   generateScopedName: 'prc-[folder]-[local]-[hash:base64:5]',
 }
 
-const baseConfig = {
+export default {
   input: {
     ...getEntrypointsFromInput(input),
     // "./test-helpers"
     'test-helpers': 'src/utils/test-helpers.tsx',
   },
+  external: dependencies.map(createPackageRegex),
+  output: {
+    interop: 'auto',
+    dir: 'dist',
+    format: 'esm',
+    preserveModules: true,
+    preserveModulesRoot: 'src',
+  },
   plugins: [
     babel({
       extensions,
@@ -209,18 +217,3 @@ const baseConfig = {
     defaultHandler(warning)
   },
 }
-
-export default [
-  // ESM
-  {
-    ...baseConfig,
-    external: dependencies.map(createPackageRegex),
-    output: {
-      interop: 'auto',
-      dir: 'dist',
-      format: 'esm',
-      preserveModules: true,
-      preserveModulesRoot: 'src',
-    },
-  },
-]

From c32d1b27e4a5d452bc75bda6a4b9677d1255d296 Mon Sep 17 00:00:00 2001
From: Jon Rohan <jonrohan@github.com>
Date: Mon, 23 Feb 2026 09:17:48 -0800
Subject: [PATCH 2/2] Simplify rollup.config.mjs

Simplify the rollup configuration for better maintainability.
---
 .changeset/tender-roses-count.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/tender-roses-count.md

diff --git a/.changeset/tender-roses-count.md b/.changeset/tender-roses-count.md
new file mode 100644
index 00000000000..a28bf99bac2
--- /dev/null
+++ b/.changeset/tender-roses-count.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+chore: simplify `rollup.config.mjs`