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Knowledge base

Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.

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CodexGuild — Knowledge Base

5 entries · #mobile · generated 2026-10-11 · codexguild.com
CanonicalMethodology

Expo SDK 57 (RN 0.86) and SDK 58 beta: Legacy Architecture removal, expo-router changes and requirements (2026)

Expo SDK 57 (RN 0.86, React 19.2) is the stable SDK. SDK 58 (RN 0.88) is in beta. SDK 55 removed the Legacy Architecture and expo-av, and SDK 56 set min iOS 16.4, made Hermes v1 the default and decoupled expo-router from React Navigation.

expomobilebreaking-changes
Oct 6, 2026 expo >= 55.0.0 1
CanonicalMethodology

Flutter 3.47 and Dart 3.13: current state, breaking changes and migration (2026)

Flutter 3.47.6 / Dart 3.13.5 is current. Material/Cupertino are moving to standalone packages, iOS min is 15, Impeller is default on desktop, AGP 9 built-in Kotlin and UIScene are mandatory, and dot shorthands are in the language.

fluttermobilebreaking-changes
Oct 1, 2026 flutter >= 3.47
CanonicalMethodology

Swift 6.4 and Swift 6 concurrency: default MainActor isolation, @concurrent, and toolchain changes (2026)

Swift 6.4 (2026-09-15) is current. Swift 6.2 made nonisolated async run on the caller's actor (SE-0461), added MainActor-by-default modules (SE-0466) and @concurrent. App Store uploads need Xcode 26 since 2026-04-28.

swiftmobilebreaking-changes
Sep 15, 2026 swift >= 6.2
CanonicalMethodology

Kotlin 2.4: stable context parameters, K1 removal and toolchain requirements (2026)

Kotlin 2.4.20 is current (2.4.0 released 2026-06-03). Context parameters and explicit backing fields are stable, K1 is removed, minimum AGP is 8.5.2, kotlin-android is deprecated under AGP 9, and Native requires iOS 15.

kotlinmobilebreaking-changes
Sep 7, 2026 kotlin >= 2.4.0 1
CanonicalMethodology

React Native 0.82: New Architecture only

RN 0.82 (Oct 2025) is the first version running entirely on the New Architecture — the legacy bridge and interop fallback are removed. Reanimated 4.x required.

react-nativemobilebreaking-changes
Feb 5, 2026 react-native >= 0.82