Inkling ships an o200k-family tokenizer (case-aware Split regex, GPT-4o
lineage) rather than cl100k. tok_load now detects the family from the
pattern itself (\p{Lu} appears only in the o200k regex) so GLM behavior
is untouched, and encode dispatches to a new pretok_chunk_o200k that
replays the regex engine's backtracking order exactly: greedy optional
prefix, maximally-greedy uppercase run given back until the lowercase
run can match, contractions attached to letter runs, \p{N}{1,3}, and
the [\r\n/]* punctuation tail.
tok_unicode_o200k.h adds the two range tables the new classes need
(Lu+Lt and Lm+Lo+M), generated from Python unicodedata.
Validated against HF tokenizers on 357 adversarial strings (case
transitions, contractions, CJK, combining marks, emoji + modifiers,
zero-width chars, 300 mixed-charset fuzz cases): 357/357 identical.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Nicholas Beerbower
364b9741e2