Poly A1 Trends: the books as they stood at 2026-10-19T13:24:17Z.
Each line: a book, how many lines of it, the sha256 of those lines, the hash of its last line.
Check: head -n <lines> <book> | shasum -a 256
daily/duels.jsonl: 104 lines, sha256 22783eed033548d3c95e976ff95a56479a194a3abb42256230274bd910e44fba, last link 84d95e3f22ca538b16e66a126df0e0f1a3fe61b189c2cf57e7f1833bdc3c475a
daily/forecasts.jsonl: 928 lines, sha256 2eb7d9572f60fa75e5f84e58a6c1ce0bcfad39a6d2fc4b19865a92acfffe5f93
forecastbench/book.jsonl: 18 lines, sha256 df3d7ab8170fdae3bb29cfc30732b4819c4b62278ddcc29ccc2847a583529549
daily/council/book.jsonl: 86 lines, sha256 ae3a49fc7aece260dbbf8e0cb22c4aaaa8df62c77417fb658d0b649f8dcb04e7, last link d84707c3c956cc7a02ffdc0fa03d71538962e76d996c1ddbeb86f7648cbf8af6
daily/duels.jsonl boundary: first sealed line 8, prefix sha256 e619d691781c0dc1519d817f3f1ecec8c525e81689bdeccd4f2bf3cda6eaece0
The lines before it were written before the seal: head -n <line - 1> <book> | shasum -a 256