diff --git a/crates/ty/docs/rules.md b/crates/ty/docs/rules.md
index c2b450ae10..852b06a201 100644
--- a/crates/ty/docs/rules.md
+++ b/crates/ty/docs/rules.md
@@ -39,7 +39,7 @@ def test(): -> "int":
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@@ -63,7 +63,7 @@ Calling a non-callable object will raise a `TypeError` at runtime.
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@@ -95,7 +95,7 @@ f(int) # error
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@@ -126,7 +126,7 @@ a = 1
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@@ -158,7 +158,7 @@ class C(A, B): ...
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@@ -218,7 +218,7 @@ type B = A
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@@ -245,7 +245,7 @@ class B(A, A): ...
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@@ -357,7 +357,7 @@ def test(): -> "Literal[5]":
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@@ -387,7 +387,7 @@ class C(A, B): ...
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@@ -413,7 +413,7 @@ t[3] # IndexError: tuple index out of range
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@@ -502,7 +502,7 @@ an atypical memory layout.
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@@ -529,7 +529,7 @@ func("foo") # error: [invalid-argument-type]
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@@ -557,7 +557,7 @@ a: int = ''
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@@ -591,7 +591,7 @@ C.instance_var = 3 # error: Cannot assign to instance variable
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@@ -627,7 +627,7 @@ asyncio.run(main())
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@@ -651,7 +651,7 @@ class A(42): ... # error: [invalid-base]
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@@ -678,7 +678,7 @@ with 1:
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@@ -707,7 +707,7 @@ a: str
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@@ -751,7 +751,7 @@ except ZeroDivisionError:
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@@ -837,7 +837,7 @@ class NonFrozenChild(FrozenBase): # Error raised here
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@@ -870,7 +870,7 @@ class C[U](Generic[T]): ...
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@@ -909,7 +909,7 @@ carol = Person(name="Carol", age=25) # typo!
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@@ -944,7 +944,7 @@ def f(t: TypeVar("U")): ...
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@@ -978,7 +978,7 @@ class B(metaclass=f): ...
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@@ -1085,7 +1085,7 @@ Correct use of `@override` is enforced by ty's `invalid-explicit-override` rule.
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@@ -1139,7 +1139,7 @@ AttributeError: Cannot overwrite NamedTuple attribute _asdict
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@@ -1169,7 +1169,7 @@ Baz = NewType("Baz", int | str) # error: invalid base for `typing.NewType`
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@@ -1219,7 +1219,7 @@ def foo(x: int) -> int: ...
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@@ -1245,7 +1245,7 @@ def f(a: int = ''): ...
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@@ -1276,7 +1276,7 @@ P2 = ParamSpec("S2") # error: ParamSpec name must match the variable it's assig
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@@ -1310,7 +1310,7 @@ TypeError: Protocols can only inherit from other protocols, got
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@@ -1359,7 +1359,7 @@ def g():
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@@ -1384,7 +1384,7 @@ def func() -> int:
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@@ -1442,7 +1442,7 @@ TODO #14889
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@@ -1469,7 +1469,7 @@ NewAlias = TypeAliasType(get_name(), int) # error: TypeAliasType name mus
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@@ -1516,7 +1516,7 @@ Bar[int] # error: too few arguments
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@@ -1546,7 +1546,7 @@ TYPE_CHECKING = ''
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@@ -1576,7 +1576,7 @@ b: Annotated[int] # `Annotated` expects at least two arguments
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@@ -1610,7 +1610,7 @@ f(10) # Error
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@@ -1638,13 +1638,47 @@ class C:
def f(self) -> TypeIs[int]: ... # Error, only positional argument expected is `self`
```
+## `invalid-type-param-order`
+
+
+Default level: error ·
+Added in 0.0.1-alpha.1 ·
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+
+
+
+**What it does**
+
+Checks for type parameters without defaults that come after type parameters with defaults.
+
+**Why is this bad?**
+
+Type parameters without defaults must come before type parameters with defaults.
+
+**Example**
+
+
+```python
+from typing import Generic, TypeVar
+
+T = TypeVar("T")
+U = TypeVar("U")
+# Error: T has no default but comes after U which has a default
+class Foo(Generic[U = int, T]): ...
+```
+
+**References**
+
+- [PEP 696: Type defaults for type parameters](https://peps.python.org/pep-0696/)
+
## `invalid-type-variable-constraints`
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@@ -1679,7 +1713,7 @@ T = TypeVar('T', bound=str) # valid bound TypeVar
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@@ -1704,7 +1738,7 @@ func() # TypeError: func() missing 1 required positional argument: 'x'
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@@ -1737,7 +1771,7 @@ alice["age"] # KeyError
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@@ -1766,7 +1800,7 @@ func("string") # error: [no-matching-overload]
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@@ -1790,7 +1824,7 @@ Subscripting an object that does not support it will raise a `TypeError` at runt
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@@ -1816,7 +1850,7 @@ for i in 34: # TypeError: 'int' object is not iterable
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@@ -1849,7 +1883,7 @@ class B(A):
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@@ -1876,7 +1910,7 @@ f(1, x=2) # Error raised here
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@@ -1934,7 +1968,7 @@ def test(): -> "int":
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@@ -1964,7 +1998,7 @@ static_assert(int(2.0 * 3.0) == 6) # error: does not have a statically known tr
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@@ -1993,7 +2027,7 @@ class B(A): ... # Error raised here
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@@ -2027,7 +2061,7 @@ class F(NamedTuple):
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@@ -2054,7 +2088,7 @@ f("foo") # Error raised here
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@@ -2082,7 +2116,7 @@ def _(x: int):
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@@ -2128,7 +2162,7 @@ class A:
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@@ -2155,7 +2189,7 @@ f(x=1, y=2) # Error raised here
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@@ -2183,7 +2217,7 @@ A().foo # AttributeError: 'A' object has no attribute 'foo'
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@@ -2208,7 +2242,7 @@ import foo # ModuleNotFoundError: No module named 'foo'
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@@ -2233,7 +2267,7 @@ print(x) # NameError: name 'x' is not defined
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@@ -2270,7 +2304,7 @@ b1 < b2 < b1 # exception raised here
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@@ -2298,7 +2332,7 @@ A() + A() # TypeError: unsupported operand type(s) for +: 'A' and 'A'
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@@ -2323,7 +2357,7 @@ l[1:10:0] # ValueError: slice step cannot be zero
Default level: warn ·
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@@ -2364,7 +2398,7 @@ class SubProto(BaseProto, Protocol):
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@@ -2452,7 +2486,7 @@ a = 20 / 0 # type: ignore
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@@ -2480,7 +2514,7 @@ A.c # AttributeError: type object 'A' has no attribute 'c'
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@@ -2512,7 +2546,7 @@ A()[0] # TypeError: 'A' object is not subscriptable
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@@ -2544,7 +2578,7 @@ from module import a # ImportError: cannot import name 'a' from 'module'
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@@ -2571,7 +2605,7 @@ cast(int, f()) # Redundant
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@@ -2595,7 +2629,7 @@ reveal_type(1) # NameError: name 'reveal_type' is not defined
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@@ -2653,7 +2687,7 @@ def g():
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@@ -2692,7 +2726,7 @@ class D(C): ... # error: [unsupported-base]
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@@ -2755,7 +2789,7 @@ def foo(x: int | str) -> int | str:
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@@ -2779,7 +2813,7 @@ Dividing by zero raises a `ZeroDivisionError` at runtime.
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diff --git a/ty.schema.json b/ty.schema.json
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@@ -815,7 +815,7 @@
},
"invalid-type-param-order": {
"title": "detects invalid type parameter order",
- "description": "## What it does\nChecks for type parameters without defaults that come after type parameters with defaults.\n\n## Why is this bad?\nType parameters without defaults must come before type parameters with defaults.\n\n## Example\n```python\nfrom typing import Generic, TypeVar\n\nT = TypeVar(\"T\")\nU = TypeVar(\"U\")\n# Error: T has no default but comes after U which has a default\nclass Foo(Generic[U = int, T]): ...\n```\n\n## References\n- [PEP 696: Type defaults for type parameters](https://peps.python.org/pep-0696/)",
+ "description": "## What it does\nChecks for type parameters without defaults that come after type parameters with defaults.\n\n## Why is this bad?\nType parameters without defaults must come before type parameters with defaults.\n\n## Example\n\n```python\nfrom typing import Generic, TypeVar\n\nT = TypeVar(\"T\")\nU = TypeVar(\"U\")\n# Error: T has no default but comes after U which has a default\nclass Foo(Generic[U = int, T]): ...\n```\n\n## References\n- [PEP 696: Type defaults for type parameters](https://peps.python.org/pep-0696/)",
"default": "error",
"oneOf": [
{