Description

The project uses black, isort, and mypy for code quality, but there is no .pre-commit-config.yaml file. Contributors must manually remember to run formatting before committing, which can lead to CI failures for style issues.

Suggested Fix

Add a .pre-commit-config.yaml with hooks for:

repos:
  - repo: https://github.com/psf/black
    rev: 25.9.0
    hooks:
      - id: black

  - repo: https://github.com/pycqa/isort
    rev: 7.0.0
    hooks:
      - id: isort

  - repo: https://github.com/pre-commit/mirrors-mypy
    rev: v1.18.1
    hooks:
      - id: mypy
        additional_dependencies: [pydantic]

And document it in CONTRIBUTING.md:

pip install pre-commit
pre-commit install