I built a small Python CLI and library called “elf” based on the workflow I have used for Advent of Code over the past few years. It automates common AoC tasks and provides a typed API for scripting. Features: • Cached puzzle input fetching

• Safe answer submission with guardrails and guess history

• Private leaderboard retrieval (table, JSON, or typed models)

• Cross-platform support (macOS, Linux, Windows)

• Built with Typer, Rich, httpx, and Pydantic PyPI: <a href=“https://pypi.org/project/elf” rel=“ugc”>https://pypi.org/project/elf</a> Feedback is welcome. Comments