This is a Python CLI tool for exporting fitness data from Garmin Connect. It authenticates via OAuth (using the garth library), retrieves activity lists, downloads activity files (GPX, TCX, original FIT, JSON), and writes a configurable CSV summary. The architecture is a single monolithic script (gcexport.py) with a small helper module (filtering.py) for tracking downloaded IDs and excluding activities. It supports session persistence, date filtering, activity type filtering, and subdirectory organization. The code is well-structured with unit tests, CI/CD (GitHub Actions), linting (flake8, pylint, black), and a Dockerfile. However, the project is effectively broken due to Garmin's TLS fingerprinting introduced in March 2026, and the maintainer has indicated they will not work on it further. The codebase itself is clean and demonstrates good Python practices, but its utility is currently zero unless Garmin changes its stance.