add content type guard catch #6

	name: CI

	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]

	steps:
	- uses: actions/checkout@v4

	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: pip install -e ".[dev]"

	- name: Lint
	run: ruff check .

	- name: Format check
	run: ruff format --check .

	- name: Type check
	run: mypy src/

	- name: Unit tests
	run: pytest tests/ -v

Provide feedback