calls_argument_type error

Argument type mismatch at a call site

When a function is called with a literal argument whose type is clearly incompatible with the declared parameter annotation, Basilisk reports the mismatch. The check mirrors the literal-kind vs annotation comparison used by assignment_compatibility.

def add(x: int, y: int) -> int:
    return x + y

result: int = add("hello", "world")   # str literals for int params → E0012

How to handle it

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

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