Python Typing

Choose the strongest valid lane automatically. Do not ask the user to pick a typing philosophy.

Consult references/typing-policy.md for the full policy document.

Required Policy

• Forbid Any, broad object, and unchecked cast() in normal internal code
• Allow them only at explicit boundaries where unknown-shape data enters
• Isolate boundary code in dedicated validator, parser, adapter, or boundary modules
• Validate immediately and return strongly typed internal objects
• Do not let raw payloads cross into the typed core
• Allow narrow lint exceptions for Any only in approved boundary modules

Lane Selection

1. Python 3.10 Constrained or stdlib-only