Fix remaining CI: 3.11 TypeVar and Graphviz on all OSes.

Replace PEP 695 generics in simulate_configs (invalid on 3.11) and
install the Graphviz system binary via setup-graphviz for macOS/Windows.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Ryan James

.github/workflows/build.yml

@@ -27,8 +27,7 @@ jobs:
         run: echo '${{ matrix.python-version }}' > .python-version
 
       - name: Install Graphviz
-        if: matrix.os == 'ubuntu-latest'
-        run: sudo apt-get update && sudo apt-get install -y graphviz
+        uses: ts-graphviz/setup-graphviz@v2
 
       - name: Install package and dependencies
         run: uv sync --extra test

pensive/automata/_config_simulation.py

@@ -9,9 +9,13 @@
 from __future__ import annotations
 
 from collections.abc import Callable, Iterable
+from typing import TypeVar
 
+Config = TypeVar("Config")
+Step = TypeVar("Step")
 
-def simulate_configs[Config, Step](
+
+def simulate_configs(
     initial: set[Config],
     steps: Iterable[Step],
     step_fn: Callable[[Config, Step], Iterable[Config]],

pyproject.toml

@@ -175,6 +175,8 @@ ignore = [
 [tool.ruff.lint.per-file-ignores]
 "test_*.py" = ["N817", "S101"]
 "__init__.py" = ["F401", "F403"]
+# PEP 695 type-parameter syntax requires Python 3.12+; keep TypeVar for 3.11.
+"pensive/automata/_config_simulation.py" = ["UP047"]
 
 [tool.ruff.lint.isort]
 known-first-party = ["pensive"]