Replace the YYYY_NNN_kebab-case scheme with title_in_snake_case-function.chord.
Snake_case makes the title double-click-selectable; dash unambiguously
separates the title from the optional function suffix.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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>
Revise and expand the authoritative .chord format specification:
version bump 1.0 → 2.0, clarified period scope, updated tokenization
rules, grammar tables, and key normalization details.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Authoritative .chord file format spec covering header fields, body
syntax, chord symbol grammar, tokenization rules, and key normalization.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
H1K0