[jnowakow]

What/Why?

The React Native Android module and packages/enriched-markdown-android keep separate copies of the same Kotlin files, so every fix has to land twice. This is a pilot for sharing them: the 28 files that were byte-identical are deleted from the RN tree and compiled from the library instead. No behavior change.

• android/shared-sources.txt lists the shared files. Sharing another file is one line there plus deleting the RN copy.
• android/build.gradle copies exactly the listed files into a generated source dir before compiling. Only listed files are taken, because the rest of the library still has different same-named counterparts in the RN tree.
• scripts/prepare-npm-publish.sh copies the listed files into android/shared-sources/ at prepack and removes them at postpack, as it already does for cpp/. The build resolves that folder first, then the monorepo path.
• Library sources are now inputs of the RN Android turbo tasks and CI jobs.

Not covered yet: a build on the module's default toolchain (AGP 8.7, Kotlin 2.0.21) and a full prepack/postpack run.

Testing

Nothing changes on screen, so there is no Playground document for this. Build and run both example apps and check that they look the same as on main:

• apps/react-native-example: yarn android
• apps/android-example: ./gradlew installDebug

The Text screen of both apps was captured top to bottom on main and on this branch. 45 of 49 screenshots are byte-identical; the other four differ only around the animated spoiler particles.

To check the published layout, run scripts/prepare-npm-publish.sh prepack, build the RN example (it should compile from android/shared-sources/), then run postpack.

PR Checklist

• Code compiles and runs on iOS (not touched)
• Code compiles and runs on Android
• Updated documentation/README if applicable
• Ran example app to verify changes
• E2E tests are passing
• Required E2E tests have been added (if applicable)