During September 2025, Ethan focused on stabilizing Storybook CSF detection in the chromaui/chromatic-cli repository, addressing issues introduced by recent storybook-rsbuild changes. He delivered a targeted bug fix in TypeScript, updating the module mapping logic to expand resolved module paths and explicitly include './storybook-config-entry.js' as an entry point. This adjustment improved the reliability of automated story rendering and reduced pipeline failures for Chromatic CLI users. Ethan’s work centered on build tools and configuration, aligning the CLI with updated Storybook entry handling. The changes were thoroughly documented and committed, ensuring traceability and reproducibility for future maintenance and integration.