There is no UUID in the Kotlin standard library, and the fixes differ per platform
Random is seeded differently per target and is not secure anywhere. An id generator is a security decision.
kmp
103 posts
@Preview is Android-only, and your shared UI has no preview at all
The annotation lives in an Android artifact, so commonMain cannot use it — and that shapes how you write composables.
The desktop target is the cheapest bug oracle you are not using
It builds in seconds, runs real Compose, and needs no device.
A version catalog is a contract, and a transitive bump breaks it quietly
Declared versions are requests, not guarantees. Resolution picks the highest.
A shared ViewModel has no lifecycle, so you have to give it one
androidx.lifecycle.ViewModel is Android's. The shared class needs an explicit clear() and two platforms that call it.
On desktop your app has windows, and nothing closes them for you
A window holds a composition, a scope and native handles. Nothing releases them for you.
Most mocking libraries do not work in commonTest, and the fix is better anyway
Dynamic proxies need a JVM. What replaces them asserts on outcomes instead of calls.
The test that only failed on wasm was measuring the environment
A single-threaded target surfaces every real-clock dependency a JVM run hides.
A klib is not a jar, and that changes how dependencies resolve
Metadata, klibs and platform artifacts resolve through different Gradle variants.
The module boundary that only the build file enforced
A layering rule nobody can violate is a dependency declaration, not a document.
A sealed hierarchy exports as an open class, so Swift cannot switch on it
Exhaustiveness is why you used a sealed type, and it is exactly what does not cross.
A staged rollout you control on one store and not on the others
Four channels, four halt latencies, and only one of them is under your hand.