* Use of pathlib everywhere.

* Fix in a1111 script.

.github/instructions/python.instructions.md

@@ -0,0 +1,43 @@
+---
+description: "Use when writing, editing, or reviewing Python code."
+applyTo: "**/*.py"
+---
+# Python code
+
+## Python 3.10 Compatibility
+
+All Python code must be compatible with Python 3.10. Do not use language features or standard-library additions introduced in 3.11 or later.
+
+### Forbidden (3.11+)
+
+| Avoid | Use instead |
+|-------|-------------|
+| `tomllib` (stdlib) | `tomli` (third-party) or conditional `try/except ImportError` |
+| `typing.Self` | `TypeVar("Self", bound="ClassName")` or `from __future__ import annotations` |
+| `typing.Never` | `typing.NoReturn` |
+| `typing.TypeVarTuple`, `typing.Unpack` | `typing_extensions` backports |
+| `StrEnum` | `class MyEnum(str, enum.Enum)` |
+| `except*` / `ExceptionGroup` | Not available; raise/catch normally |
+| `asyncio.TaskGroup`, `asyncio.timeout()` | `asyncio.gather()` / `asyncio.wait_for()` |
+
+### Forbidden (3.12+)
+
+| Avoid | Use instead |
+|-------|-------------|
+| `type X = ...` (type alias statement) | `X: TypeAlias = ...` with `typing.TypeAlias` |
+| `def f[T](...)` / `class C[T]` generic syntax | `TypeVar` + `Generic[T]` |
+| `@typing.override` | Omit or use comment |
+| `itertools.batched()` | Manual chunking or `more-itertools` |
+
+### Safe to use (available in 3.10)
+
+- `match`/`case` structural pattern matching
+- `X | Y` union type syntax in annotations (e.g., `int | None`)
+- `typing.TypeAlias`, `typing.ParamSpec`
+- `list[int]`, `dict[str, int]` — built-in generic aliases
+- `zip(..., strict=True)`
+- `str.removeprefix()` / `str.removesuffix()`
+
+## Paths
+
+Use `pathlib.Path` for filesystem paths instead of `str` paths or `os.path`.