April 2026: Delivered core enhancements to JetBrains/amper that improve modularity, performance, correctness, and international readiness. Key features include Nested Templates Support for applying templates within templates, Maven Classifier Support in Coordinates eliminating classifier-related warnings, and Unique Cache Keys for cinterop .def files to ensure accurate incremental caching. Additional work improved YAML value tagging accuracy, introduced Localization Safety for AmperModule properties, and performed targeted code quality cleanup (imports removal and replacing VirtualFile with Path). Business impact includes faster incremental builds, more reliable configuration processing, easier localization, and a cleaner codebase for ongoing maintenance.

March 2026 monthly summary for JetBrains/amper. This report highlights delivered features, major fixes, overall impact, and the technologies demonstrated in a performance-focused review for business value and technical achievement. Month: 2026-03. Key features delivered: - Frontend Diagnostics Refactor and Enhancements: Introduced DiagnosticId type and enumerations; dropped diagnostic IDs from factories; renamed TreeDiagnostic to TreeDiagnosticFactory; propagated KnownIntValues to the schema generator. These changes establish stable, enumerable diagnostic IDs for tooling, enable richer suppression catalogs, and improve integration with schema generation. - CLI: Parallel task execution within a single Amper invocation: Enabled parallelism for multiple tasks, reducing orchestration time and improving throughput of multi-task runs. - Infra and dependencies modernization: Updated fastutil library; bumped IntelliJ platform versions and Bouncycastle to 1.79 to align with platform/tooling needs; introduced MavenContributorContext to order values from Maven trees during conversion. - AMPer-5198: Plugin data origin and schema origin: Added source attribution for plugin data and aligned schema origin with plugin source for ID and enabled properties. - AMPER-5201: Conflicts handling improvements: Renamed isMoreSpecificThan to compareContexts; refined all key values together; added reporting of conflicting values and custom CLI rendering for ConflictingProperties; prevented conflicting values in templates; fixed module conflicts after templates changes. - Additional improvements: Provisioning test updated to use Oracle OpenJDK 26; introduced MavenContributorContext; improved DR-based CLI rendering of build problems; documentation metadata updated. - Render build problems from DR in CLI: Enhanced CLI to render structured build problems instead of raw messages. - Documentation Update: Copyright year updated to 2026. Major bugs fixed: - Frontend Cleanup and Correctness Fixes: Addressed correctness issues in diagnostic handling and plugin usage; removed empty/incorrect sources. - Infra: Do Not Opt In To Frontend Diagnostics In Common Template: Fixed template behavior to avoid unintended frontend diagnostics opt-in in shared templates. - Warnings and Deprecation Fixes: Resolved a broad set of warnings (delayed initialization, serializer accessibility, YAML handling, Maven deprecation warnings, unused/unreachable code), improving stability and maintainability. - IDE/Code quality fixes: Marked expectedPluginYamlPath as used in IDE to avoid false warnings; fixed conflicts in Amper modules after templates became unordered; clarified refineProperties comments. Overall impact and accomplishments: - Increased reliability and developer productivity: robust diagnostic system, better tooling support, and stabilized build/deploy pipelines. - Performance gains: parallel task execution in Amper reduces run times for multi-task workflows and improves resource utilization. - Improved platform readiness and security: platform bumps and library upgrades (fastutil, Bouncycastle) position the project for future toolchains and security requirements. - Enhanced observability and governance: richer diagnostics metadata, provenance and schema origin data for plugins, and improved conflict reporting provide clearer guidance for developers and operators. Technologies and skills demonstrated: - Frontend/TypeScript: DiagnosticId typing, enumerations, and factory renames; KnownIntValues propagation strategy. - Kotlin/Gradle/YAML tooling: Cleanup, deprecation handling, warnings resolution, and build hygiene. - CLI engineering: Parallel task orchestration and custom rendering for diagnostics. - Dependency management and tooling: MavenContributorContext, OpenJDK provisioning changes, platform and library bumps (IntelliJ, Bouncycastle, fastutil). - Data modeling and schema concepts: Diagnostics enumeration, schema origin alignment, and suppression/catalog support. - Release-quality practices: Documentation updates, code quality fixes, and clearer error reporting for end-users.

February 2026 — JetBrains/amper: Delivered a stability-focused feature for Compose Hot Reload by exposing a public version field in the settings. This change ensures proper configuration, prevents empty settings, and reduces hot-reload related instability for developers during UI iteration. No major bugs were reported this month; the primary impact was improved reliability and usability of hot reload, contributing to faster development cycles and fewer misconfigurations.

January 2026 monthly summary for JetBrains/amper focusing on developer tooling improvements and CI/test visibility. Delivered three key features across build, docs, and CI integration, with no major bug fixes recorded in this period.

December 2025 monthly summary for JetBrains/amper focused on UX polish, build/test diagnostics, and documentation, delivering measurable business value across UI clarity, test navigation, and test result accuracy. Key enhancements include improved build problem rendering, IntelliJ test location hints, and robust handling of test assumptions in CLI, complemented by enhanced test reporting and correct test flow mapping in TeamCity.

November 2025 (JetBrains/amper) focused on stabilizing the Fragment API and IDE/workspace integration, improving build predictability, and delivering documentation/branding updates. Key outcomes include deterministic directory generation for fragment artifacts, build-root aware path handling, pre-build cleanup of Java annotation processing, and centralized ignored-modules configuration to reduce clutter and misconfig. These changes enhance developer experience, shorten iteration cycles, and establish a solid foundation for scalable IDE integration and future feature work. Documentation improvements across Lombok, Ktor, Spring Boot, and branding/icons further boost reference accuracy and onboarding.

October 2025 focused on strengthening configuration reliability, IDE UX, and documentation quality in the JetBrains/amper repository. Delivered string semantics for configuration references, enhanced project plugin completion, and improved Markdown formatting for project modules, with a broader impact on reduce configuration errors and improve developer experience.

September 2025 monthly summary focused on delivering developer-facing features, improving IDE responsiveness, and strengthening platform stability across JetBrains/amper and JetBrains/intellij-community. Key initiatives reduced runtime error noise, accelerated in-IDE development cycles, and aligned JVM/platform targets for IDE compatibility. The work also reduced maintenance overhead and improved documentation-driven workflows for the IntelliJ ecosystem.

August 2025 monthly summary for JetBrains/amper focused on accelerating IDE onboarding, improving reliability, and simplifying product configuration. Delivered features for IDE project wizard integration, and implemented robust handling for edge cases in model construction. Strengthened diagnostics and error processing, and completed terminology cleanup and default-configuration testing to reduce maintenance risk and future-proof the codebase. Business value delivered includes faster project creation, fewer runtime failures, clearer diagnostics, and a simpler, future-ready product type model.

July 2025 for JetBrains/amper focused on stabilizing the frontend, strengthening type-safety, and improving diagnostics, while advancing platform hygiene and serialization. Key outcomes include safer template/module handling, stronger type guarantees, and reduced runtime errors, enabling faster feature delivery and improved developer productivity across frontend, Android integration, tests, and tooling.

June 2025 monthly summary for JetBrains/amper focusing on delivering data-handling enhancements and IDE-oriented dependency management, plus a template bug fix. Implemented a TypedKeyMap base class and refactored Cache to inherit from it to simplify map logic and improve code organization. Enhanced KMP dependency resolution for multiplatform projects with a settings map for source sets, platform tracking, and deduplication of parent KMP coordinates to improve IDE filtering and suggestions. Fixed Android KMP template to correctly identify the platform as Android instead of Linux in output. These changes improve type-safety, maintainability, and accuracy of platform discovery, delivering measurable business value through faster IDE feedback, reduced confusion in dependency resolution, and more reliable templates.

May 2025 monthly summary for JetBrains/amper: Focused on reliability and developer experience in dependency management. Delivered three core features: improved dependency-resolution diagnostics, type-safe dependency graph API enhancements, and BOM support in the IDE schema. Major bugs addressed included duplicate transitive message filtering and corrected coordinate validation, leading to clearer build problems and fewer false positives. Overall impact: faster troubleshooting, more robust dependency handling, and smoother BOM usage in IDEs. Technologies demonstrated: API design and evolution, type-safety hardening, IDE schema integration, and dependency graph work in Kotlin/Java tooling.

April 2025 (2025-04) monthly summary for JetBrains/amper. Focused on stabilizing core run/diagnostics flow, enhancing insights and dependency resolution, and expanding observability across frontend and build pipeline. Delivered notable features, fixed critical bugs, and improved diagnostic capabilities, resulting in stronger reliability and business value. Key features delivered: - AMPER-4248 Insight and ModuleDependency enhancements: allow accessing the underlying nodes in the filtered graph from the insight; save the original node and the insight into the ModuleDependencyWithOverriddenVersion diagnostic; enable tracing for implicit dependencies when version is not present. Commits: 0e4193f7e48a886be5558eca42c9e9e1fc7ae4fa; e414388b7f2673f9697e8f0d9e1a0489f2a0ad21; e1f823237f9db86e0192ae9a0cb32b0e270d6897. - AMPER-4254 DR messaging and diagnostics restructuring: refactor DR messages interfaces and move diagnostics into a dedicated package for DR diagnostics; accompanying tests and frontend/DR test refinements. Commits: 3a246a6f8230db2b3816645c288604d43e28e280; 4317751485a1fc3df6dd5031dce7cfa80ddfcac6; - Tree output formatting improvement: prettify the tree output using box-drawing characters, improving readability of graphs and diagnostics. Commit: f3302e69e8bc26c863cecc1bafbf9257764839b8. - Diagnostics infrastructure refactor and messaging improvements (AMPER-4254): extract diagnostic reporter, create dedicated diagnostic classes, internalize SimpleMessage, renderMessage usage, and related messaging refinements. Commits: 74038644ab18510aec74a2e025f86e52e9ec685e; f3c0daa5d9c336a0b629739a41a85b5f456b487a; f5adee36cffd374dcfe2cb054382b000fc8854d5; d62921aefc6bb1b368626b69d82adb06908779fd; 76c806cdf2ad7b243bb6bbee327401e402376d4a; 841a81f227131d3e4a5608d587cc7928487179d9; c78359c780cfce34795f651cc23aa65fed7ab95a; 8c8f1a1870043b1614045e9e619a4561ee570047; c53c8a40fa10c4ceb534a4f33cfd7ffb1830bf49; f56342ec0461bfb434068488d19f17f033cd71dd; 43744a16ff4136d820fee7dc426a92a1130a04a7. - Frontend tracing and API improvements: add traces to PsiFiles for all Amper files and expose Fragment API modifier property as part of public API; enabling per-file observability and stronger frontend diagnostics. Commits: 704e1442f96a9c73b9234441145823c41d0135b8; 6b7811c09fff7d80bd23a9919fea4a4a649e8921. - Dependency resolution and observability enhancements: abstraction for Gradle attributes; enrich downloadAttempt span for better tracing; additional related instrumentation. Commits: 5129df7045a496b23ef51ca296954ec9584ccd01; 2189884f121f2d03ff1fac3dbd3c464090eca029. - Internationalization groundwork: add @Nls annotations to user-facing strings and related diagnostic classes to prepare for localization. Commits: 5a6b8597bc6acf4e7bd6dfb2236ea405ea212f91; adbd5494cb1eec2d039e6013b829fab841ba9794; 44d9b2f6b9f7f1f9ea892f93edd6f2f106c75da6; f51b26dc0f7028e42e84d1ab741c5b4a339b8778. Major bugs fixed: - CLI bug: Propagate the error code from the run command to Amper itself, ensuring correct exit semantics and better automation. Commit: 2f5650e93043fc66b1c8b894e831225c589f807c. - Do not report overridden dependency versions for unspecified versions (AMPER-4270): prevent false-positive overrides when versions are not defined. Commit: 79de6d2047171fcafd8379636a5e645af88ebfe6. - Maven coordinates parsing and spaces handling: do not trim parts when checking for spaces; strengthen error typing for Maven coordinates parsing. Commits: f89fd27ee1a1560fb1dda6c6cc5a231630094414; 73bf8cca63c3a95b537d3aae9106fac13f7c4ed5. - Warn about unsupported Maven classifiers (AMPER-4277): add warning to clarify Maven classifiers are not supported. Commit: ba06edc0c3d5ca88ced9d0b5daeb710e6c865fd2. - MavenCoordinatesHaveSpace: remove unused arguments to clean up messaging. Commit: 7babdc4fe785614b260707e8fffcd5b9cd6f69bb. Overall impact and accomplishments: - Elevated reliability and correctness in run/diagnostics flow, reduced false-positive dependency overrides, and improved end-to-end traceability across backend, build, and frontend components. - Strengthened observability with per-PsiFile traces, enriched downloadAttempt spans, and structured DR diagnostics, enabling faster root-cause analysis and quicker release cycles. - Improved user-facing diagnostics and localization readiness, through standardized messages and @Nls annotations, while maintaining deterministic behavior in diagnostics factories. Technologies and skills demonstrated: - Kotlin-based tooling, Gradle-based build system, and modern JVM tooling (kotlinx.serialization 1.7.3, JUnit 5.12.1). - Advanced observability and tracing: per-file traces, enriched span data, and trace-based diagnostic flows. - API refactoring and modularization: DR messaging architecture, diagnostic reporters, and static IDs. - Frontend API enhancements and UI/UX readability improvements (box-drawn tree formatting) and public API exposure changes. - Internationalization groundwork with @Nls annotations for localization readiness. - Robust parsing and validation improvements for Maven coordinates and build metadata.

March 2025 highlights stability and developer-experience improvements across the JetBrains/amper project. Focus areas included type-safety hardening, API clarity, and robust cache/file-system behavior, delivering measurable business value through safer refactors, clearer APIs, and improved diagnosability. Notable themes: warnings cleanup improving code safety; inline usage for exported dependencies; diagnostics/deprecation handling enhancements; Amper cache/root and cache/file system improvements with better error handling and cross-platform support; and API/CLI enhancements with improved error messaging and usage patterns.