```gitignore
# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class

# C extensions
*.so

# Distribution / packaging
build/
dist/
downloads/
eggs/
.eggs/
*.egg-info/
.installed.cfg

# Virtual environments
env/
venv/
ENV/
env.bak/
venv.bak/

# PyInstaller
*.manifest
*.spec

# Unit test / coverage reports
htmlcov/
.tox/
.nox/
.coverage
.coverage.*
.cache/
.pytest_cache/

# IDE settings
.idea/
.vscode/
*.sublime-project
*.sublime-workspace

# Jupyter Notebook checkpoints
.ipynb_checkpoints/

# macOS
.DS_Store

# Snakemake working directory
.snakemake/

# Results / binary outputs
results/
*.h5
*.hdf5

# Data pipeline outputs
data/fractal_fit.pkl
data/kernel.npy
data/discrete_action.pkl

# Analysis outputs
analysis/*.npy

# Editable install metadata
*.egg-info/
ar_sim.egg-info/
```
