How ReRune Works Under the Hood | Flutter SDK, Caching & OTA Updates
What actually happens when your Flutter app reads a translation?
This technical walkthrough follows the ReRune SDK from its generated localization overlay to manifest requests, versioned locale downloads, persistent storage, and in-memory text resolution.
We look at full and delta updates, ETags, per-key fallback, placeholders, plurals, content variants, Flutter rebuilds, and runtime language availability. Then we follow a failed update, the next retry, stale-manifest recovery, concurrent checks, and an offline restart.
The examples use Flutter SDK 1.1.0. Controlled request and cache sequences were executed with the real SDK controller, parser, HTTP clients, and native IO cache. These fixtures are labeled in the video. Platform storage and widget details refer to the Flutter implementation.
Explore ReRune: https://rerune.io
Chapters
00:00 One translation, two paths
00:43 Generated integration
01:25 Startup and refresh policy
02:09 Manifest requests and ETags
03:16 Full updates and deltas
04:44 Persistent cache and storage
06:11 Text resolution and fallback
06:51 Placeholders, plurals and variants
07:59 Flutter rebuilds and runtime locales
08:43 Failures, retries and concurrency
10:37 Offline restart and release boundaries
#Flutter #Localization #ReRune