Version Packages

Author: github-actions[bot]

.changeset/anchored-position-scroll-recalculation.md

@@ -17,8 +17,8 @@
     "@types/react": "^18.3.11",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.3",
-    "@primer/react": "38.18.0",
-    "@primer/styled-react": "1.0.4",
+    "@primer/react": "38.19.0",
+    "@primer/styled-react": "1.0.5",
     "styled-components": "5.x",
     "typescript": "^5.9.2",
     "vite": "^7.1.11"

.changeset/combined-refs-hook.md

@@ -10,8 +10,8 @@
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
-    "@primer/react": "38.18.0",
-    "@primer/styled-react": "1.0.4",
+    "@primer/react": "38.19.0",
+    "@primer/styled-react": "1.0.5",
     "next": "^16.1.7",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",

.changeset/improve-theme-provider-perf.md

@@ -11,8 +11,8 @@
   },
   "dependencies": {
     "@primer/octicons-react": "^19.21.0",
-    "@primer/react": "38.18.0",
-    "@primer/styled-react": "1.0.4",
+    "@primer/react": "38.19.0",
+    "@primer/styled-react": "1.0.5",
     "clsx": "^2.1.1",
     "next": "^16.1.7",
     "react": "^19.2.0",

.changeset/soft-pianos-carry.md

@@ -1,5 +1,26 @@
 # @primer/react
 
+## 38.19.0
+
+### Minor Changes
+
+- [#7677](https://github.com/primer/react/pull/7677) [`c1a81b1`](https://github.com/primer/react/commit/c1a81b178742ba547b85a3df3ed3c27bcff6b7c5) Thanks [@TylerJDev](https://github.com/TylerJDev)! - AnchoredOverlay: Add Popover API to AnchoredOverlay (behind `primer_react_css_anchor_positioning` feature flag)
+
+- [#7697](https://github.com/primer/react/pull/7697) [`990ce7b`](https://github.com/primer/react/commit/990ce7b625bcf90ef3867e93086d0c74835a9068) Thanks [@hectahertz](https://github.com/hectahertz)! - **Stack**: Add `tight` (4px) and `cozy` (12px) spacing values to `gap` and `padding` props. Add `paddingBlock` and `paddingInline` props for directional padding control.
+
+### Patch Changes
+
+- [#7652](https://github.com/primer/react/pull/7652) [`5d19e2b`](https://github.com/primer/react/commit/5d19e2bb5bbd444f2e82d98eef300c221863941c) Thanks [@owenniblock](https://github.com/owenniblock)! - useAnchoredPosition: recalculate overlay position when any scrollable ancestor (or the window) is scrolled.
+
+- [#7638](https://github.com/primer/react/pull/7638) [`f04e85d`](https://github.com/primer/react/commit/f04e85df536cd6e8047f70b070bd3cf7c0961f92) Thanks [@iansan5653](https://github.com/iansan5653)! - Update internal implementations of combined refs to improve performance and add support for React 19 callback refs
+
+- [#7695](https://github.com/primer/react/pull/7695) [`780fc3d`](https://github.com/primer/react/commit/780fc3d7b52fd0f9b63f313af6355398180a0118) Thanks [@mattcosta7](https://github.com/mattcosta7)! - perf(ThemeProvider): Reduce unnecessary renders and effect cascades
+
+  - Replace `useState` + `useEffect` SSR hydration handoff with `useSyncExternalStore` — eliminates post-hydration re-render
+  - Replace `useState` + `useEffect` in `useSystemColorMode` with `useSyncExternalStore` — eliminates effect gap and stale-then-update flicker
+  - Cache `getServerHandoff` DOM read + JSON.parse per ID (runs once, not on every call)
+  - Memoize context value object to prevent unnecessary re-renders of all consumers
+
 ## 38.18.0
 
 ### Minor Changes

.changeset/stack-spacing-options.md

@@ -1,7 +1,7 @@
 {
   "name": "@primer/react",
   "type": "module",
-  "version": "38.18.0",
+  "version": "38.19.0",
   "description": "An implementation of GitHub's Primer Design System using React",
   "main": "./dist/index.js",
   "module": "./dist/index.js",