Worked on the openclaw/openclaw repository, focusing on refining the OpenClaw Doctor tool to address a specific issue affecting NixOS users. Delivered a targeted bug fix that improved the accuracy of permission warnings by ensuring symlinks to the immutable /nix/store were properly ignored, thereby reducing false-positive alerts. This adjustment enhanced the reliability of health checks and streamlined the operator experience by minimizing unnecessary noise. The solution involved updating the integrity check logic using Node.js and shell scripting, with careful attention to system administration best practices. These changes contributed to a more maintainable codebase and reduced support overhead for real permission issues.