This is the underlying issue, that needs to be fixed & released:

• Update annotation parsing to work with PEP 649 in Python 3.14 jcrist/msgspec#651

Here is our temporary workaround:

• fix bugs that first appear with Python 3.14 #5285

• Struct fields aren't discovered in Python 3.14 jcrist/msgspec#847 (comment)
• The Second Annual Meeting of the Extraordinary League of Runtime Typers beartype/beartype#479
• Python 3.14.0a3: TypeError: Extra positional arguments provided jcrist/msgspec#795
• Fix crash when TypedDict contains incorrect metadata jcrist/msgspec#853
• [mod] ci: add cp3.14 #5217