First release of atcoder — a command line for AtCoder via the kenkoooo.com community API.

Commands

• atcoder problems — list recent problems with IRT difficulty scores; filter by --difficulty low/mid/high or --contest abc/arc/agc
• atcoder contests — list contests newest first
• atcoder user <handle> — show AC rank; --submissions adds recent submissions
• atcoder search <keyword> — case-insensitive problem title search
• atcoder top — hardest problems by IRT difficulty score

Output formats

-o table|json|jsonl|csv|tsv|url|raw — defaults to table on a TTY, JSONL when piped.

No API key required

All data comes from kenkoooo.com/atcoder — the same backend used by AtCoder Problems, widely trusted by the competitive programming community.