[$250] Bump react-native-reanimated to v4

[mountiny]

Coming from this proposal

Background

react-native-reanimated is our core animation library. We’re currently on v3.19.1. v4 is essentially the continuation of v3: same implementation, but focused solely on the New Architecture and introducing new features. It also formalizes the split into two packages: react-native-reanimated and react-native-worklets.

Problem

Reanimated v3 is already effectively unsupported, no new features are added (only patch releases on request). Staying on v3 means we miss out on ongoing improvements, optimizations available only in v4, and risk falling behind as the ecosystem standardizes on v4.

Solution

Let’s bump to Reanimated v4. This will:

• Keep us current with the actively supported version and aligned with the ecosystem.
• Enable new optimization options on Android (issue with benchmark)
• Drop two patches (dontWhitelistTextProp.patch and correctly-handle-Easing.bezier.patch)
• Allow us to remove the direct Reanimated dependency in react-native-live-markdown by switching it to react-native-worklets

Upwork Automation - Do Not Edit

• Upwork Job URL: https://www.upwork.com/jobs/~021961167667293267879
• Upwork Job ID: 1961167667293267879
• Last Price Increase: 2025-08-28

Issue Owner

Current Issue Owner: @suneox

Issue Owner

Current Issue Owner: @blazejkustra

Issue Owner

Current Issue Owner: @blazejkustra

[melvin-bot]

Triggered auto assignment to @abekkala (NewFeature), see https://stackoverflowteams.com/c/expensify/questions/14418#:~:text=BugZero%20process%20steps%20for%20feature%20requests for more details. Please add this Feature request to a GH project, as outlined in the SO.

[melvin-bot]

⚠️ It looks like this issue is labelled as a New Feature but not tied to any GitHub Project. Keep in mind that all new features should be tied to GitHub Projects in order to properly track external CAP software time ⚠️

[melvin-bot]

Triggered auto assignment to Design team member for new feature review - @dannymcclain (NewFeature)