MyPy

Enable 'strict_optional' in mypy.ini

Run MyPy on payment modules

Identify locations where variables could be None

Apply defensive 'if x is not None' checks

Validate with MyPy pass

Define new TypedDict or Dataclass

Update function signatures

Run MyPy to find all broken call sites

Fix each site based on type errors

Deploy with verified type compatibility

Use Annotated types for tensor dimensions

Install MyPy-Tensorflow or equivalent plugin

Run MyPy on pipeline scripts

Catch dimension mismatches before GPU allocation

Create a shared mypy.ini with mandatory strictness

Integrate into the central CI/CD pipeline

Enforce type coverage metrics

Reject PRs that introduce untyped public APIs

Run MyPy in 'lax' mode

Target one module at a time using 'follow_imports=silent'

Add type hints to the module

Enable error reporting for that module specifically

Repeat until full coverage

Define custom 'SanitizedString' NewType

Enforce its use in database query functions via MyPy

MyPy flags any raw user input passed directly to queries

Resolve by adding sanitization logic

Use MyPy-verified type hints

Connect Sphinx or MkDocs with the 'autodoc' extension

Generate documentation directly from the validated type signatures

Ensure docs are never out of date