Windows runs were failing with OSError 28 (No space left on device) while downloading PySide6 -- the runner disk is full (compounded by leftover act caches from earlier failed runs). --no-cache-dir avoids keeping wheel copies. The runner still needs disk freed; this just trims the footprint. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_016yT89n4zR4qbrySoSiEyZs