nyuu's 12 capital+small letter pairs in 15 bytes (10 bits a pair), its timestamp as a delta within the file, the suffix once per file; ngPost-style 32 hex digits in 16 bytes; other ids as zstd text as before. Recent boneless: 25.2 → 20.3 B per segment (and 25.0 → 19.5 on the next range); a 2013 ath range stays at 17.9 (JBinUp ids are text). Every chunk of three real ranges decodes to itself (edge:bench --verify). Encoding is no slower than v1 (less text for zstd). Version 1 chunks stay readable. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>