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Phase 1 is implemented and verified in the lightning-kmp-app fork on claude/jvm-target-actuals (27a0054). Four things in the plan were wrong, and doing the work is what surfaced them. **jvm() belongs at the start of phase 1, not phase 4 -- for the library.** The plan said leave it off in both builds until phase 4. That is right for mantra and wrong for the fork: library/src/jvmMain/ is an orphan source set until the library declares the target, so phases 1-3 would all have been written blind. Declared first, `:library:compileKotlinJvm` names the remaining expects, and that list beats grepping for `expect ` -- it shrinks by exactly what you implement and cannot drift from the truth. The build stays red across phases 1-3 by design. That checklist is now recorded as the phase 1 exit condition: exactly eight expects should remain, and exactly which eight. Anything else means something in the phase is wrong. **Phase 3 is two decisions, not four.** gracefulSingleSeedDecryption and gracefulMultiSeedDecryption are pure exception mapping into a DecryptSeedResult, and the exception they branch on is java.security.KeyStoreException -- a plain JCA type that exists on the jvm. Both are near-copies of the android actuals and need nothing settled first, so they move alongside phase 2. Only keyStoreEncryption and keyStoreDecryption are the security decision, and that part of the analysis stands. **The Fibonacci template must not be deleted.** The plan said to drop it "assuming nothing references them". Things do: generateFibi is exercised by template tests in commonTest, androidHostTest, iosTest, jvmTest and linuxX64Test, and JvmFibiTest asserts a value that depends on precisely the two properties fibiprops.jvm.kt defines. That file already satisfies two of the 25 expects, which is why the count was 23 missing rather than 25. Removing the template is five test files plus four fibiprops.* actuals, and it is a separate cleanup. **Phase 1 is fifteen actuals, not fourteen**, and two of them are not copies of android -- platformElectrumRegtestConf (10.0.2.2 is the emulator's alias for the host loopback; a jvm process is already on the host) and phoenixLogWriters (android routes kermit into slf4j because android tooling reads that back). Also recorded, because it cost time: a worktree cannot run gradle at all until the submodules are checked out *and* local.properties exists at five levels. Neither is version controlled, so a fresh worktree has neither, and the failure surfaces four builds down at :...:secp256k1-kmp:jni:android as "SDK location not found" rather than anywhere obviously related. Both builds were run: `:library:compileKotlinJvm` fails only on the known eight, and `:composeApp:compileDebugKotlinAndroid` still passes with the library's jvm target declared -- the check that matters, since a new variant must not change how the android target resolves the library. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This is a Kotlin Multiplatform project targeting Android, iOS, Desktop (JVM).
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/composeApp is for code that will be shared across your Compose Multiplatform applications. It contains several subfolders:
- commonMain is for code that’s common for all targets.
- Other folders are for Kotlin code that will be compiled for only the platform indicated in the folder name. For example, if you want to use Apple’s CoreCrypto for the iOS part of your Kotlin app, the iosMain folder would be the right place for such calls. Similarly, if you want to edit the Desktop (JVM) specific part, the jvmMain folder is the appropriate location.
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/iosApp contains iOS applications. Even if you’re sharing your UI with Compose Multiplatform, you need this entry point for your iOS app. This is also where you should add SwiftUI code for your project.
Build and Run Android Application
To build and run the development version of the Android app, use the run configuration from the run widget in your IDE’s toolbar or build it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:assembleDebug - on Windows
.\gradlew.bat :composeApp:assembleDebug
Build and Run Desktop (JVM) Application
To build and run the development version of the desktop app, use the run configuration from the run widget in your IDE’s toolbar or run it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:run - on Windows
.\gradlew.bat :composeApp:run
Build and Run iOS Application
To build and run the development version of the iOS app, use the run configuration from the run widget in your IDE’s toolbar or open the /iosApp directory in Xcode and run it from there.
Learn more about Kotlin Multiplatform…