February 2026: Implemented foundational Quarkus support in Mill with a single-module runnable app, native image and testing workflows, plus end-to-end native/JVM test execution. Added cross-module Quarkus tests, produced a unified outputs task, and stabilized the pipeline with key Docker-related fixes and updated docs.

2026-01 monthly summary for com-lihaoyi/mill: Delivered targeted Android CI stability improvements, GraalVM native image support, Android unit test resources, and build-system reliability enhancements. The work stabilized CI pipelines, expanded native-image deployment capabilities, improved Android testing resources, and tightened cross-OS packaging. Key outcomes include enforcing a single SdkManager instance via a file-locking worker, honoring reachability metadata for GraalVM native images, enabling Android resource inclusion in unit tests, and autodetecting Android emulator architecture to improve UX on Apple Silicon Macs.

December 2025 monthly work summary focusing on key accomplishments across the com-lihaoyi/mill repo. Delivered a major feature enabling GraalVM native images with reachability metadata, stabilized the build for mixed Java/Kotlin sources, and fixed Android instrumented test resource handling. The changes improved build reliability, cross-language compatibility, and native-image success rates, delivering tangible business value such as faster native builds, fewer runtime failures, and more deterministic dependency resolution.

In 2025-11, focused on stabilizing test infrastructure, improving dependency management, and enabling performance-oriented features across Android, JavaModule, and Spring Boot integrations within Mill. Delivered measurable business value through smaller, more reliable test artifacts, streamlined BOM-based dependencies, and faster startup via AOT/native support. The work strengthens platform compatibility, reduces maintenance burden, and accelerates onboarding for new projects that rely on popular ecosystems (Android, Spring, Micronaut).

Month: 2025-10 | This month focused on delivering Android-specific improvements in the Mill build system, shipping a critical test- packaging optimization, and enhancing release documentation. Key features delivered: - Android DataBinding and ViewBinding support added to the Mill build system, including a new Jetchat example module configured to use these features and integrated dependencies/worker implementations. (Commit: 96c018eb3168bf4129c019abf2aaca93c6f85fbd) Major bugs fixed: - Reduced Android test APK size by excluding main app dependencies from test packaging and refactoring dependency/classpath handling to include only necessary test components. (Commit: 008e9452018570449b0f9d5a4b80f979ce676947) Documentation and build configuration: - Android Release Configuration Documentation and Build Settings published, covering disable debug mode, signing information, optional ProGuard, plus updates to Android debug build configuration. (Commit: 793ec26e5fb9fd8d8983a0e89aa035821c940264) Overall impact and accomplishments: - Improved CI reliability and developer experience with binding support, leaner APKs, and clearer release workflows. - Business value: faster builds, smaller distribution artifacts, and maintainable release processes. Technologies/skills demonstrated: - Mill build tooling, Android data binding/view binding integration, test packaging optimization, and release documentation.

September 2025 monthly summary: Delivered configurable logging levels for the KSP CLI (ksp.logging) with updated docs and a minor fix to the contributing task name; improved documentation consistency by renaming 'Jvm Args' to 'Jvm Parameters'; added KSP 2 support in program mode with an in-process worker, including a KSP 2 API and worker modules, plus updates to build configurations and IDE integration; published a Mill Android build blog post detailing the approach and examples; cleaned Android build docs by removing a broken link to Android Native examples. These changes enhance observability, configurability, cross-version KSP support, and developer experience for Android builds and Mill workflows.

August 2025 monthly summary focused on delivering developer-friendly enhancements across two repositories, with an emphasis on testing ergonomics, Kotlin/KSP compatibility, and CI reliability. The work delivered improved test ergonomics for vanilla Android modules, extended KSP 2.x support with practical examples, clarified Android build tooling, reinforced CI coverage for Android samples, and updated KSP2 CLI/docs to reflect latest versions.

July 2025 monthly summary for com-lihaoyi/mill focusing on Android build reliability and test stability. Delivered two critical bug fixes in the Android module, improving cache invalidation and screenshot test discovery. These changes reduce stale artifacts and flaky tests, boosting CI reliability and developer productivity.

June 2025 — com-lihaoyi/mill: Android build system enhancements and JetLagged sample integration focused on stability, BOM-based dependency management, and test coverage. Key features delivered: - Android build system improvements for Compose and resources: centralizes Compose BOM usage, isolates manifest merging in an external module, and refactors resource handling to decouple resource compilation from generated sources, improving classpath resolution and packaging. - JetLagged Android Compose sample integration and testing: integrates the JetLagged sample into the Mill build, adds Android resource management configurations, defines a new sample module, and enables Android instrumentation tests. Major bugs fixed: - Isolated Android manifest merging to avoid classpath conflicts. - Reworked Android resources to fix packaging/classpath resolution issues. Overall impact and accomplishments: - More stable Android builds with BOM-based dependency management, cleaner module boundaries, and reliable resource packaging. Instrumentation tests for the Android sample broaden test coverage and provide early feedback on Android-specific behavior. Technologies/skills demonstrated: - Android Gradle and BOM usage, modularization and isolation of build concerns, resource processing and packaging, manifest merging strategies, Mill-based Android sample integration, and instrumentation testing.

May 2025: Advanced Android native development support in Mill by adding an endless-tunnel third-party example and an androidRun test command; refactored Android dependency management to rely on Coursier; cleaned up samples and separated Android resources; hardened tests with Hilt and Kotlin Compose; resolved R8 compilation issues for older API levels. Notable commits: 0e0282a939acbe14c87a9523901cb356e35ac1c0 (Third party example for android native: endless-tunnel (#5053)); 18bb026f726711567fb619a4cbb028bc3c8da11a (Android/cleanup dependency resolution workarounds (#5098)).

April 2025 — Summary for com-lihaoyi/mill: - Delivered two key features focused on Android developers using Mill, with improvements aimed at reducing build friction and enabling modern DI patterns. - Hilt integration and Android DI for Mill: Implemented a Transform ASM step to enable compile-time dependency injection for Android projects managed by Mill, plus a Todo app sample to exercise the flow. Commits: 8e53fef51d58bbb5eba234ab02eab6dc2a167de4; 1c92127d4f6289f2ec6444f60da6614eba389861. - Android build tooling and release process improvements: Refactored release installation to decouple app and library modules, added build type settings for R8/D8 dex generation, and reduced hardcoded Android manifest parameters to improve configuration flexibility. Commit: ee30b0afc5d80383820b98af83194afb1a9da2ba. - These changes collectively improve Android developer experience with Mill, enable safer and faster builds, and provide a clearer path for maintainability and future enhancements.

February 2025 (com-lihaoyi/mill) delivered stability and compatibility improvements across core build tooling. Key work focused on Android and Kotlin integration pipelines, enhancing reliability for Android development and Kotlin project builds within Mill.

January 2025 monthly summary focusing on stabilizing Android-related workflows in Mill, delivering faster, more reliable CI and a smoother Android development experience. This month delivered three core features across the Mill Android integration, fixed a critical APK installation bug, and introduced automated UI regression testing for Android apps. These efforts reduced flaky CI runs, improved onboarding, and strengthened cross-tool IDE support, enabled by enhanced CI workflows, BSP-based imports, persistent keystore, and visual regression tooling.

December 2024: Focused on enabling Android development support and testing within the Mill build tool. Implemented end-to-end Android workflows, including installation and execution of Android apps, automated AVD/emulator management, and groundwork for CI/CD integration to run Android tests in headless emulators. This work broadens Mill’s applicability to Android projects and accelerates Android app development and testing within CI pipelines.