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868af4ac425c4222b577e6590cbe00d6e3f89a09
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4 Commits

Author SHA1 Message Date
H1K0 868af4ac42 feat: add vocabulary constants and tokenize/detokenize to tokenizer.py 
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>
 2026-05-19 15:47:28 +03:00
H1K0 a473499fac feat: implement .chord file parser and canonical transposer; freeze requirements 
src/tokenizer.py:
  - parse_chord_file(Path) → ChordPeriod: reads header + bar body, strips //
    comments, validates bar position counts and chord symbols, raises
    ChordFormatError with filename and bar number on any violation.
  - transpose_to_canonical(ChordPeriod) → ChordPeriod: shifts all chord roots
    and bass notes by the semitone offset to C major / A minor; fast-path
    returns the original object when shift == 0.

tests/test_chord_file_parser.py: 39 tests covering parsing of 4 valid fixtures
  (C major, F# major, B minor, G# minor), error messages for 2 invalid
  fixtures, and transposition correctness including slash chord root+bass.

tests/fixtures/: 6 .chord fixture files (4 valid, 2 invalid).

requirements.txt: pinned to current latest stable versions
  (torch 2.12.0, music21 10.1.0, pretty_midi 0.2.11, matplotlib 3.10.9,
  numpy 2.4.6, pandas 3.0.3, pytest 9.0.3); Python >= 3.11 noted.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-05-19 15:27:57 +03:00
H1K0 dd77de00d0 feat: implement chord symbol parser with full test suite 
Adds src/chord_parser.py with parse_chord_symbol() → ChordTokens.
Handles all 18 qualities (including Unicode °/Δ/ø variants and
alternative spellings), shorthand expansion (maj9 → maj7+ext9,
C9 → 7+ext9, etc.), slash chords, and flat→sharp root normalization.
Raises ChordParseError with a descriptive message on bad input.

Adds tests/test_chord_parser.py: 90 tests covering all qualities,
all 7 extension values (including shorthands), slash chords, root
normalization, all §4.6 spec examples, and 10 invalid-input cases.

Adds requirements.txt with project dependencies.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-05-19 11:17:10 +03:00
H1K0 8672c10f78 chore: initialize project scaffold 
Add .gitignore (excludes .claude/, venv, checkpoints, processed data,
external corpora), .gitattributes (LF normalization, binary markers),
full directory tree with .gitkeep placeholders, and src __init__ stubs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-05-19 10:28:17 +03:00