Concise monthly summary for 2025-09 focusing on key deliverables and impact in facebook/buck2-prelude. Central achievement was a bug fix addressing header path handling in headers-as-raw-headers-mode when packages are not in use. The change normalizes header paths and corrects base-directory calculation to ensure header files are processed correctly regardless of their location relative to packages. Implemented as a targeted commit with clear traceability.

August 2025: Delivered a robustness improvement for Buck2 prelude's compilation database generation, focusing on header-only libraries with circular dependencies. Implemented a heuristic to select a suitable source library target when the primary target lacks full compilation data, preventing IDE errors and ensuring accurate include paths. Updated compilation_database.bxl to pull compile commands from source library targets, increasing reliability for IDEs and code navigation.