{
  "version": 1,
  "provenance": "Generic target-relative approach/enclosure operators. Target-guided review motivated an explicitly separated enclosure and spelling-independent function. No pitches, chord progressions, bar schedules or extracted phrase templates are stored.",
  "license": "MIT",
  "patterns": [
    {
      "id": "below",
      "kind": "approach",
      "semitones": [
        -1
      ],
      "durations": [
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "above",
      "kind": "approach",
      "semitones": [
        1
      ],
      "durations": [
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "upper_lower",
      "kind": "enclosure",
      "semitones": [
        1,
        -1
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "lower_upper",
      "kind": "enclosure",
      "semitones": [
        -1,
        1
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "ascending",
      "kind": "connection",
      "semitones": [
        -2,
        -1
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "descending",
      "kind": "connection",
      "semitones": [
        2,
        1
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0"
    },
    {
      "id": "delayed_below",
      "kind": "approach",
      "semitones": [
        -1
      ],
      "durations": [
        "1/2"
      ],
      "gap": "1/2"
    },
    {
      "id": "mapped_upper_lower",
      "kind": "enclosure",
      "semitones": [
        2,
        -1
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0",
      "diatonic_indices": [
        0
      ]
    },
    {
      "id": "lower_mapped_upper",
      "kind": "enclosure",
      "semitones": [
        -1,
        2
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0",
      "diatonic_indices": [
        1
      ]
    },
    {
      "id": "separated_lower_upper",
      "kind": "enclosure",
      "semitones": [
        -1,
        2
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "internal_gaps": [
        "1/2"
      ],
      "gap": "0",
      "diatonic_indices": [
        1
      ]
    },
    {
      "id": "chromatic_scalar_up",
      "kind": "approach",
      "semitones": [
        -3,
        -2
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0",
      "diatonic_indices": [
        1
      ]
    },
    {
      "id": "chromatic_scalar_down",
      "kind": "approach",
      "semitones": [
        3,
        2
      ],
      "durations": [
        "1/2",
        "1/2"
      ],
      "gap": "0",
      "diatonic_indices": [
        1
      ]
    },
    {
      "id": "short_chromatic_up",
      "kind": "connection",
      "semitones": [
        -2,
        -1
      ],
      "durations": [
        "1/4",
        "1/4"
      ],
      "gap": "0",
      "difficulty": "sixteenth"
    },
    {
      "id": "short_chromatic_down",
      "kind": "connection",
      "semitones": [
        2,
        1
      ],
      "durations": [
        "1/4",
        "1/4"
      ],
      "gap": "0",
      "difficulty": "sixteenth"
    },
    {
      "id": "triplet_chromatic_up",
      "kind": "connection",
      "semitones": [
        -2,
        -1
      ],
      "durations": [
        "1/3",
        "1/3"
      ],
      "gap": "0",
      "difficulty": "triplet"
    },
    {
      "id": "triplet_chromatic_down",
      "kind": "connection",
      "semitones": [
        2,
        1
      ],
      "durations": [
        "1/3",
        "1/3"
      ],
      "gap": "0",
      "difficulty": "triplet"
    },
    {
      "id": "quarter_below",
      "kind": "approach",
      "semitones": [
        -1
      ],
      "durations": [
        "1"
      ],
      "gap": "0"
    },
    {
      "id": "quarter_above",
      "kind": "approach",
      "semitones": [
        1
      ],
      "durations": [
        "1"
      ],
      "gap": "0"
    }
  ],
  "blues": [
    {
      "id": "minor_to_major_third",
      "degree": 3,
      "alter": -1,
      "target_degree": 3
    },
    {
      "id": "flat_fifth_to_fifth",
      "degree": 5,
      "alter": -1,
      "target_degree": 5
    }
  ],
  "max_approach": "3/2",
  "delayed_approach": {
    "id": "bounded_semitone_resolution",
    "max_note": "1/2",
    "deadline": "4",
    "steps": [
      -1,
      1
    ],
    "arrivals": [
      "1",
      "3/2",
      "2",
      "5/2",
      "3",
      "7/2",
      "4"
    ],
    "holds": [
      "1/2",
      "1"
    ]
  },
  "passing": {
    "id": "chromatic_passing",
    "max_note": "1/2",
    "steps": [
      -1,
      1
    ],
    "endpoints": "Source-key/chord motion or separately validated colors; contiguous same-direction semitones."
  }
}