Context

Create GitHub Actions workflow(s) for continuous integration. Should run on every push and PR.

Acceptance Criteria

• Workflow runs linting/formatting check
• Workflow runs type checking
• Workflow runs pytest with coverage
• Workflow fails if coverage < 80%
• Workflow runs on push to main and on PRs
• Matrix testing (Python 3.12+, consider 3.13)
• Caching for dependencies
• Badge in README

Dependencies

• Evaluate and configure linting/formatting toolchain (ruff/black/isort) #23 (linting), Set up type checking with mypy or pyright and strict config #25 (type checking), testing framework issue

Design Spec Reference

Section 15.2