Add 5/4, 7/4, 7/8, 9/8 to _VALID_TIMES and VOCAB (TIME_* tokens).
Vocab size grows from 81 to 85 tokens. _parse_metre in the McGill
converter assigns subdivision=8 to 7/8 and 9/8. Spec bumped to v2.2.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- STYLE_user renamed to STYLE_H1K0 in VOCAB (author's personal tag)
- Style field now accepts any [A-Za-z][A-Za-z0-9_]* identifier in .chord files
- Unknown styles fall back to STYLE_other at tokenization time with a log warning
- Test fixtures updated to style: other; drop closed _VALID_STYLES frozenset
- Spec bumped to v2.1: documents open style field, fallback behaviour, and §5.7
guide on registering a new style token
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds VOCAB (81 tokens), TOKEN_TO_ID, and ID_TO_TOKEN per spec §5.2.
tokenize_period() transposes to C/Am then emits BOS + metadata tokens +
per-bar chord/HOLD/NC tokens + BAR + EOS. detokenize_to_period() is the
exact inverse, returning a ChordPeriod in canonical key. The m(add9)
quality maps to QUAL_m_add9 in the vocab (parentheses not valid in token
names) via _qual_token/_token_qual helpers.
36 new tests cover vocabulary integrity, token sequence structure,
and full round-trip fidelity for all four valid fixture files.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
H1K0