January 2026: Delivered a suite of architectural and platform updates for JetBrains/amper, focusing on observability, build performance, and ecosystem compatibility. The work enabled deeper telemetry, faster incremental builds, and smoother operation across updated JVMs, while improving test reliability and user-facing configuration handling. Business value includes reduced time-to-build, improved diagnostics, and easier maintenance with up-to-date platform dependencies.

2025-12 Monthly Dev Summary for JetBrains/amper: Delivered telemetry and stability improvements to the Incremental Cache and enhanced serialization for compilation requests, driving better performance visibility, reliability, and maintainability. Key improvements include telemetry enhancements for incremental cache reads/writes and command execution duration, stabilization and refactor of IncrementalCache via extension functions, and a serialization cleanup that adopts SerializablePath for JicCompilationRequest. Highlights: - Incremental Cache Telemetry and Monitoring: Added telemetry for cache read/write processes and command duration to improve performance monitoring and state visibility. - Incremental Cache Internal Stability and Refactor: Stabilized internal cache behavior, removed an unnecessary consistency check, and refactored to extension functions for readability. - JicCompilationRequest Serialization Enhancement: Refactored path handling to use SerializablePath for cleaner, more capable serialization. Impact: - Improved observability and faster identification of performance hotspots without guessing, leading to more proactive optimization. - Cleaner, more maintainable IncrementalCache codebase with clearer responsibilities and easier future enhancements. - Safer and more robust serialization for compilation requests, enabling easier extension and interoperability.

November 2025 — JetBrains/amper: Delivered core Java incremental compilation improvements and module wiring, stabilized the build pipeline, and advanced documentation and IDE alignment. Key outcomes include faster incremental builds, reliable Java/Kotlin output separation, and improved developer onboarding through clearer docs and standardized telemetry. Enabled Java 16 as a minimal target, registered the jvm-inc-builder, and re-enabled JIC after a blocker fix, with updated Kotlin serialization for IDE modules and consolidated telemetry storage for easier analysis.

October 2025 performance and stability sprint for amper: delivered packaging overhaul for IntelliJ build artifacts (ZIP-based packaging, new modules, removal of Bazel configs), added granular control for incremental Java compilation with comprehensive tests, improved logging/diagnostics to reduce noise and enhance message clarity, and modernized the Compose Multiplatform template to align with current Android practices. These changes improve build reliability, reduce packaging artifacts, expand test coverage, and enhance developer experience through clearer diagnostics and streamlined templates.

Month: 2025-09 — Consolidated improvements across config hygiene, CI robustness, and IDE tooling for amper. Delivered measurable business value by reducing noise, tightening CI feedback loops, and upgrading platform dependencies to improve stability and developer productivity.

August 2025 (2025-08) — The amper project focused on strengthening build reliability for Java/JVM annotation processing, correcting test semantics for ap-with-params, and accelerating failure diagnosis in CI. Key business value: more stable incremental builds, faster developer feedback, and clearer test diagnostics that reduce debugging time and enable faster issue localization. Overall accomplishments: - Stabilized incremental compilation by ensuring recompilation triggers when annotation processor options or generated sources change, and correctly handling leaf fragments for generated sources. - Improved test data semantics and processor option handling for ap-with-params, reducing flaky tests and ensuring tests express the correct option existence behavior. - Enhanced TeamCity test reporting with explicit expected vs actual values and IDE diff support, enabling quicker diagnosis of failures in CI and IDEs. Technologies/skills demonstrated: - Java/JVM incremental compilation and annotation processing workflows - Build tooling and incremental compilation strategies - CI/test reporting improvements and IDE integration - Test data quality and semantics revision for processor options

July 2025 performance and maintenance sprint for JetBrains/amper. Focused on accelerating Java builds and tightening the incremental compilation pipeline in jvm-inc-builder, while simplifying the codebase to reduce maintenance risk. Key changes include delivering incremental Java compilation support in JvmCompileTask and a targeted cleanup of the jvm-inc-builder surface area. Major items removed or streamlined: UI designer support, Kotlin support, and Bazel-specific code, all to improve maintainability and focus on Java incremental compilation. Also added core dependencies (e.g., OpenTelemetry and IntelliJ utilities) to strengthen incremental compilation workflows and observability, aligned with the latest IJ Platform updates. Impact: faster, more reliable incremental builds; smaller surface area and easier onboarding for Java-centric development; improved platform compatibility and observability. Technologies/skills demonstrated include Java incremental compilation, OpenTelemetry, IntelliJ Platform utilities, dependency management, and platform upgrade practices.

April 2025 (2025-04) — JetBrains/amper: Delivered a major IntelliJ Platform upgrade and build simplification, driving language tooling stability, API consistency, and maintainability. Key features delivered include upgrading to IntelliJ Platform 251.23774 with PSI enhancements (parser utility and YAML/TOML PSI API adjustments) and build configuration simplification by removing explicit repositories. Major bugs fixed: none reported this month. Overall impact: improved language support and more stable tooling, with reduced maintenance burden from a streamlined build configuration. Technologies demonstrated: IntelliJ Platform upgrade workflow, PSI/AST tooling, YAML/TOML PSI API work, parser utilities, and repository configuration management.

March 2025 monthly summary for JetBrains/amper: Delivered platform readiness with IntelliJ Platform 243.24978, stabilized core dependencies, and hardened test infrastructure, enabling smoother CI and reduced maintenance costs. The work focused on aligning with the latest IDE platform, improving test reliability, and reducing bundle size while delivering concrete features and robust fixes.

February 2025 monthly summary for amper (JetBrains/amper). This cycle strengthened tooling stability, improved cross-tool lock handling, and updated platform dependencies to align with the latest IntelliJ Platform. The work delivers tangible business value by enabling more reliable builds, better native platform support, and smoother automation for downstream teams.

November 2024: Documentation alignment with internal API refactor for the Package Checker Plugin in JetBrains/intellij-sdk-docs. Focus was on maintaining developer clarity and reducing integration friction by updating the API changes documentation to reflect the BuildSystemDependenciesModelBase and removing references to the renamed MavenSharedDependenciesModel. The work is backed by a single commit updating api_changes_list_2023.md to reflect #1384 changes, ensuring docs stay in sync with code changes.