chore: Bump React Native to 0.85 and Reanimated to 4.4#563
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The dependency bump moved the root react-native to 0.85.3 (new-arch only), but the paper example's Android native files resolved react-native and the gradle plugin from the ROOT node_modules. The old-architecture paper app was therefore compiled against react-android 0.85.3 and failed (com.facebook.react.uimanager.layoutanimation is gone in the new-arch-only build). Point the paper Android build (settings.gradle, app/build.gradle) at the example's own node_modules (RN 0.81.4 — the last version supporting the old architecture) and add hoistingLimits so its dependencies stay local. The iOS Podfile already resolves react-native via require.resolve, so pod install picks up the local version. Verified with a clean Android build (APK built).
Expo Go ships the native Reanimated/Worklets pinned by the SDK, so the
example must match them. The bump pushed it to 4.4.1 / 0.9.1, which crashed
in Expo Go ("undefined is not a function" in NativeWorklets/installUnpackers).
Pin to the SDK 56 versions (Reanimated 4.3.1, Worklets 0.8.3); the fabric
example keeps the latest since it's a real build.
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Xcode 16+/26 ship a stricter Clang that rejects fmt's consteval format-string
checks ("call to consteval function ... is not a constant expression" in
fmt/format-inl.h). RN 0.81's vendored fmt hits this on iOS. Compile only the
fmt pod as C++17 in the Podfile post_install hook so the consteval path is
skipped and fmt uses runtime validation.
Lowering the fmt pod to C++17 dodged the consteval error but broke the iOS 26 SDK's <atomic> (incompatible with <stdatomic.h> before C++23). Keep the C++ standard and instead define FMT_USE_CONSTEVAL=0 so fmt skips its consteval format-string checks and falls back to runtime validation.
fmt 11's base.h sets FMT_USE_CONSTEVAL=1 unconditionally for Apple Clang >=14, so neither a -D define nor a build setting can override it, and Xcode 16+ Clang rejects the consteval format-string checks. Patch base.h in post_install to force FMT_USE_CONSTEVAL=0 (runtime validation), keeping the C++ standard intact so <atomic> still compiles.
The fmt consteval patch cleared one wall, but RN 0.81 + Xcode 26.5 then fails on React-Fabric header resolution (and more). Old-arch RN 0.81 isn't compatible with the iOS 26.5 SDK; paper is built/CI-tested on Xcode 16.x, which has no fmt issue. Keep the Podfile clean.
- Use StyleSheet.absoluteFill instead of inlined absolute-fill keys (absoluteFillObject was dropped from RN 0.85 types). - Restore example/app @shopify/flash-list to latest (2.3.1); the bump had accidentally pinned it down to 2.0.2. - Trim the DeepReadonly comment to a single line.
The SharedValue -> ReadonlySharedValue tweak (and its comment) aren't needed: the library typechecks fine against Reanimated 4.4 with the original DeepReadonly. Keeping the bump minimal.
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Summary
Bumps the library and the web / fabric / expo example apps to React Native 0.85.3 + Reanimated 4.4.1 (Expo SDK 56).
moduleResolution: bundler,DerivedValue,StyleSheet.absoluteFillObjectremoval).node_modules.Replaces #554 (auto-closed when its branch was renamed from
fix/…todeps/…).