You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Bug FixesKind: in v2.1.265,
Bug FixesSection of the release
What
Claude Code's general-purpose function for cleaning up identifiers, such as those used for artifact or file names, now checks whether the cleaned-up result matches a name Windows reserves for devices (CON, PRN, AUX, NUL, COM1-COM9, LPT1-LPT9). If it does, an underscore is added to the front of the name.
Why
Windows treats these names specially and can fail to create a file or folder with one of them, so this prevents Claude Code from generating an identifier that would break on Windows.
