Month 2025-10: Implemented an experimental Advanced ESM Build feature for the web-infra-dev/rslib repository, enabling improved ESM output quality, static analysis friendliness, and enhanced code-splitting through Rspack's EsmLibraryPlugin. The feature is configurable, integrated into the build pipeline, and accompanied by documentation updates. Core work centers around the new experiments.advancedEsm flag and associated build changes, with commit fe8ce3eb8287a16b5e78d9cccbb59a04b1ddbcd5 and PR #1273.

Monthly summary for 2025-09 focusing on performance and build optimizations across two repositories. Delivered HMR stability improvements for Rspack with vanilla-extract-css and splitChunks in web-infra-dev/rsbuild, and introduced a caching optimization for vanilla-extract modules in rspack-contrib/rstack-examples. Documentation updates in English and Chinese styling guides accompany changes. These efforts improve development feedback loop, reduce rebuild times, and enhance module management, delivering clear business value through faster iterations and more predictable builds.

In August 2025, delivered a key feature for rsbuild: end-to-end test stabilization for lazy compilation. Refactored end-to-end tests to remove reliance on specific build log messages, simplifying assertions by verifying rendered content and dynamic import resolutions, thereby improving test robustness and observable behavior. This reduces test flakiness and accelerates CI feedback for lazy compilation changes.

February 2025 monthly work summary focused on delivering a practical example of lazy compilation in Rspack. The primary deliverable is a Lazy Compilation Demo Server added to the rspack-contrib/rstack-examples repository, demonstrating how lazy compilation can be wired through a custom server setup and integrated into a minimal demo environment. The work includes creating new entry points, module imports, and a message display mechanism to illustrate the lazy loading workflow, plus dependency updates to ensure compatibility.