BSK-E0004 error

Missing *args / **kwargs type annotation

Every variadic positional parameter (*args) and variadic keyword parameter (**kwargs) must carry an explicit type annotation in strict Basilisk code.

Real basilisk check output

What you see when BSK-E0004 fires on a minimal example:

basilisk check output reporting BSK-E0004 — Missing `*args` / `**kwargs` type annotation

How to handle it

Every rule is on by default — strict is the default, not a cage. You can dial BSK-E0004 down per-file or per-path from your editor or pyproject.toml, or fix the code so it type-checks. See the Missing Annotations rules and the complete diagnostic reference.

Canonical URL: https://www.basilisk-python.dev/errors/BSK-E0004