Weiwei Wu improved the development environment setup for the kvcache-ai/ktransformers repository by updating the installation documentation to recommend using 'make dev_install' instead of the previous 'make install_numa' process. This change aligned the onboarding workflow with the current Makefile targets, reducing the number of steps required for new contributors and ensuring consistency across development environments. Weiwei focused on build systems and documentation, utilizing Markdown to clearly communicate the updated process. The work addressed developer pain points around setup complexity, streamlining onboarding and lowering support needs. The contribution was targeted, addressing a specific workflow gap with a documentation-first engineering approach.