Fixes a crash in `getSystemEnvironment` on desktop when running in a
headless environment (such as most CI runners) by providing a default
density qualifier. In the future that might be something that's nice to
make configurable, but since both our use case and the linked issue
encountered it when calling `getString` I didn't worry about it too
hard.
Fixes [CMP-8068](https://youtrack.jetbrains.com/issue/CMP-8068)
## Testing
Made a local build and used it to run some tests in another project that
were failing on calls to `getString`
## Release Notes
### Fixes - Resources
- Fix crash in `getSystemEnvironment` on headless desktop
Add runtime libraries compatibility check for Compose projects
Fixes [CMP-9288](https://youtrack.jetbrains.com/issue/CMP-9288) Check
compose libraries compatibility
<img width="1083" height="264" alt="image"
src="https://github.com/user-attachments/assets/4b321025-7b76-4a8e-a1f8-12a7ddabbd56"
/>
To disable the check there is a new gradle property:
`org.jetbrains.compose.library.compatibility.check.disable`
## Testing
- Added integration tests to verify version mismatches and override
behavior.
## Release Notes
### Features - Gradle Plugin
- Add a compatibility check for runtime libraries to ensure consistency
with the expected Compose version.
Continuation of
https://github.com/JetBrains/compose-multiplatform/pull/5486
Attempt to fix:
```
Caused by: java.net.SocketTimeoutException: Read timed out
13:45:18 at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:867)
13:45:18 at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:829)
13:45:18 at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:366)
13:45:18 at org.jsoup.helper.HttpConnection.get(HttpConnection.java:353)
13:45:18 at org.jetbrains.compose.internal.publishing.DownloadFromSpaceMavenRepoTask.downloadArtifactsFromComposeDev(DownloadFromSpaceTask.kt:37)
13:45:18 at org.jetbrains.compose.internal.publishing.DownloadFromSpaceMavenRepoTask.run(DownloadFromSpaceTask.kt:28)
13:45:18 at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
13:45:18 at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:125)
13:45:18 ... 117 more
```
happened at
[20-11-2025](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_Task5UploadToMavenCentral/5680809?showLog=5680809_16241_16045&logView=flowAware)
The default socket timeout is 30 seconds according JSoup docs
## Testing
1. create a Space client key
2. set env. vars: COMPOSE_REPO_USERNAME, COMPOSE_DEV_REPO_PROJECT_ID,
COMPOSE_REPO_KEY, COMPOSE_DEV_REPO_REPO_ID
3. run
```
./gradlew -p=cli downloadArtifactsFromComposeDev --info --stacktrace "-Pmaven.central.coordinates=org.jetbrains.androidx.lifecycle:*:2.10.0-alpha05,org.jetbrains.androidx.navigation3:*:1.0.0-alpha05,org.jetbrains.androidx.navigationevent:*:1.0.0-beta02,org.jetbrains.androidx.savedstate:*:1.4.0-rc01,org.jetbrains.androidx.window:*:1.5.0" "-Pmaven.central.deployName=CMP 1.10.0-beta02 (org.jetbrains.androidx)" --rerun-tasks
```
## Release Notes
N/A
Attempt to fix:
```
Caused by: java.net.SocketTimeoutException: Socket timeout has expired [url=https://public.jetbrains.space/api/http/projects/.../packages/repositories/.../packages/name:org.jetbrains.skiko%2Fskiko-jvm-runtime-linux_x64/versions/version:1.4.0-rc01?%24fields=%2A, socket_timeout=unknown] ms
at io.ktor.client.network.sockets.TimeoutExceptionsKt.SocketTimeoutException(TimeoutExceptions.kt:30)
at io.ktor.client.plugins.HttpTimeoutKt.SocketTimeoutException(HttpTimeout.kt:272)
at io.ktor.client.engine.okhttp.OkUtilsKt.mapOkHttpException(OkUtils.kt:82)
at io.ktor.client.engine.okhttp.OkUtilsKt.access$mapOkHttpException(OkUtils.kt:1)
at io.ktor.client.engine.okhttp.OkHttpCallback.onFailure(OkUtils.kt:42)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:525)
at COROUTINE_STACKTRACE_PRESERVATION_BOUNDARY.rethrow(Unknown Source)
at space.jetbrains.api.runtime.stacktrace.RequestStacktraceKt.withPreservedStacktrace(RequestStacktrace.kt:13)
at space.jetbrains.api.runtime.SpaceHttpClientKt.callSpaceApi(SpaceHttpClient.kt:128)
at space.jetbrains.api.runtime.SpaceHttpClientKt.callSpaceApi$default(SpaceHttpClient.kt:80)
at space.jetbrains.api.runtime.RestResource.callWithParameters(RestResource.kt:57)
at space.jetbrains.api.runtime.RestResource.callWithParameters$default(RestResource.kt:50)
at space.jetbrains.api.runtime.resources.projects.packages.repositories.packages.Versions.getPackageVersionDetails(Versions.kt:172)
at space.jetbrains.api.runtime.resources.projects.packages.repositories.packages.Versions.getPackageVersionDetails$default(Versions.kt:162)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient$forEachPackageWithVersion$1$1.invokeSuspend(SpaceApiClient.kt:37)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient$forEachPackageWithVersion$1$1.invoke(SpaceApiClient.kt)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient$forEachPackageWithVersion$1$1.invoke(SpaceApiClient.kt)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient.forAllInAllBatches(SpaceApiClient.kt:76)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient.access$forAllInAllBatches(SpaceApiClient.kt:15)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient$forAllInAllBatches$1.invokeSuspend(SpaceApiClient.kt)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:263)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:94)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:70)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient.withSpaceClient(SpaceApiClient.kt:52)
at org.jetbrains.compose.internal.publishing.utils.SpaceApiClient.forEachPackageWithVersion(SpaceApiClient.kt:34)
at org.jetbrains.compose.internal.publishing.FindModulesInSpaceTask.run(FindModulesInSpaceTask.kt:57)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:125)
... 117 more
```
happened 3 times in a row at
[19-11-2025](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_AllPublicRelease/5677823)
The default socket timeout is 10 seconds
([OkHttpEngine](c68f4ee0d5/ktor-client/ktor-client-okhttp/jvm/src/io/ktor/client/engine/okhttp/OkHttpEngine.kt (L244)
),
[OkHttpClient](5b23df7132/okhttp/src/commonJvmAndroid/kotlin/okhttp3/OkHttpClient.kt (L1172)))
Also replace deprecated calls by the suggested calls
## Testing
1. create a Space client key
2. set env. vars: COMPOSE_REPO_USERNAME, COMPOSE_DEV_REPO_PROJECT_ID,
COMPOSE_REPO_KEY, COMPOSE_DEV_REPO_REPO_ID
3. run
```
./gradlew -p=cli findComposeModules --info --stacktrace "-Pmaven.central.coordinates=org.jetbrains.androidx.lifecycle:*:2.10.0-alpha05,org.jetbrains.androidx.navigation3:*:1.0.0-alpha05,org.jetbrains.androidx.navigationevent:*:1.0.0-beta02,org.jetbrains.androidx.savedstate:*:1.4.0-rc01,org.jetbrains.androidx.window:*:1.5.0" "-Pmaven.central.deployName=CMP 1.10.0-beta02 (org.jetbrains.androidx)" --rerun-tasks
```
## Release Notes
N/A
[CMP-9273](https://youtrack.jetbrains.com/issue/CMP-9273) Using Kotlin
2.2.20 in user project cause build error
## Release Notes
### Fixes - Resources
- _(prerelease fix)_ Fixed compatibility with Kotlin 2.2.20 on Web
Update test projects for Gradle plugin to use direct dependencies
instead of aliases
Describe proposed changes and the issue being fixed
Fixes [CMP-9183](https://youtrack.jetbrains.com/issue/CMP-9183)
## Testing
Existing tests should continue to pass
## Release Notes
N/A
Fixes https://youtrack.jetbrains.com/issue/CMP-8873
## Testing
Tested manually. Swift export is experimental
## Release Notes
### Fixes - Resources
- Update iOS resource copying to an iOS app bundle to support Swift
Export libraries
Deprecate Gradle plugin dependency aliases and provide direct
replacement.
Fixes [CMP-7613](https://youtrack.jetbrains.com/issue/CMP-7613) Consider
deprecating aliases `compose.material3`, etc in favour of using Gradle
version catalog
## Testing
Run a sample app, open build.gradle.kts, apply all suggested
replacements.
## Release Notes
### Migration Notes - Multiple Platforms
- Dependency aliases in Gradle plugin (e.g. `compose.ui`) are now
deprecated. Use provided direct artifact coordinates and add them to the
version catalog.
Use Web Cache API for all resources
The Cache is reset on every app launch (page refresh).
The initial idea was to reset the Cache only when a new session starts,
but we risk to have an outdated resources state (it can be incompatible
with the app logic expectations and lead to crashes).
Fixes https://youtrack.jetbrains.com/issue/CMP-7996
## Testing
This should be tested by QA
## Release Notes
### Fixes - Resources
- Use Web Cache API for all resources to avoid repeated and redundant
HTTP requests
Partially addresses https://youtrack.jetbrains.com/issue/CMP-9075
But it doesn't ultimately fix the FOUC problem. In many cases font
preloading will be necessary to improve the UX.
Describe proposed changes and the issue being fixed
## Testing
- This should be tested by QA
## Release Notes
### Fixes - Resources
- Use the non-empty font as a default when awaiting for a asynchronous
request completion on web
The web demo stopped compiling after updating to 1.9.0 due to deprecated
API usages.
This PR uses ComposeViewport API and unifies the Js and Wasm main.kt
## Testing
N/A
## Release Notes
N/A
Handle a case when Int.Locale('...') is created without a region - then
use an empty string for region.
Fixes https://youtrack.jetbrains.com/issue/CMP-6930
## Testing
- Added a test
- This should be tested by QA
## Release Notes
### Fixes - Resources
- Fix a crash when calling `getString` and the Locale has no region
specified
Vendula Švastalová
Andrei Salavei
Cedrick Cooke
Victor Kropp
Nikita Lipsky
Konstantin
Igor Demin
Ivan Matkov
Pavel Shishkin
Oleksandr Karpovich
InsanusMokrassar