[Bug] Plugin installation fails with EEXIST error on Windows when cache directory exists

Bug Description
Failed to install plugin "qingyi@qingyi": EEXIST: file already exists, mkdir 'C:\Users\PC\.claude\plugins\cache'

Environment Info

• Platform: win32
• Terminal: pycharm
• Version: 2.1.71
• Feedback ID: e44db160-dd64-46bb-897a-164fa8ef0bd5

Errors

[{"error":"EEXIST: file already exists, mkdir 'C:\\Users\\PC\\.claude\\plugins'","timestamp":"2026-03-08T02:28:00.604Z"},{"error":"EEXIST: file already exists, mkdir 'C:\\Users\\PC\\.claude\\shell-snapshots'","timestamp":"2026-03-08T02:28:17.270Z"}]