{
  "version": 1,
  "provenance": "Shared chord/function policies. Target-guided review exposed enharmonic and immediate-resolution restrictions; changes are general degree policies, not target phrases. Available tensions and delayed resolution are informed by Berklee faculty teaching; numerical duration limits are engineering settings.",
  "license": "MIT",
  "colors": [
    {
      "id": "major_ninth",
      "qualities": [
        "major"
      ],
      "degree": 9,
      "alter": 0,
      "max_beats": "4",
      "outside": false
    },
    {
      "id": "major_thirteenth",
      "qualities": [
        "major"
      ],
      "degree": 13,
      "alter": 0,
      "max_beats": "4",
      "outside": false
    },
    {
      "id": "lydian_color",
      "qualities": [
        "major",
        "dominant"
      ],
      "degree": 11,
      "alter": 1,
      "max_beats": "2",
      "outside": true,
      "resolve": true
    },
    {
      "id": "minor_ninth",
      "qualities": [
        "minor"
      ],
      "degree": 9,
      "alter": 0,
      "max_beats": "4",
      "outside": true
    },
    {
      "id": "minor_eleventh",
      "qualities": [
        "minor",
        "half_diminished"
      ],
      "degree": 11,
      "alter": 0,
      "max_beats": "4",
      "outside": false
    },
    {
      "id": "minor_sixth",
      "qualities": [
        "minor"
      ],
      "degree": 6,
      "alter": 0,
      "max_beats": "4",
      "outside": true,
      "function": "tonic_or_predominant",
      "continuation": "Stable color on tonic/predominant minor harmony; duration and explicit chord exclusions remain binding."
    },
    {
      "id": "dominant_ninth",
      "qualities": [
        "dominant"
      ],
      "degree": 9,
      "alter": 0,
      "max_beats": "4",
      "outside": true
    },
    {
      "id": "dominant_thirteenth",
      "qualities": [
        "dominant"
      ],
      "degree": 13,
      "alter": 0,
      "max_beats": "4",
      "outside": true
    },
    {
      "id": "dominant_flat_ninth",
      "qualities": [
        "dominant"
      ],
      "degree": 9,
      "alter": -1,
      "max_beats": "4",
      "outside": true,
      "resolve": false,
      "function": "resolving_dominant",
      "continuation": "Bounded dominant color. May continue through other chord tones/tensions rather than resolve immediately by step. Written exclusions and harmonic function remain binding."
    },
    {
      "id": "dominant_sharp_ninth",
      "qualities": [
        "dominant"
      ],
      "degree": 9,
      "alter": 1,
      "max_beats": "4",
      "outside": true,
      "resolve": false,
      "function": "resolving_dominant",
      "continuation": "Bounded dominant color. May continue through other chord tones/tensions rather than resolve immediately by step. Written exclusions and harmonic function remain binding."
    },
    {
      "id": "dominant_flat_thirteenth",
      "qualities": [
        "dominant"
      ],
      "degree": 13,
      "alter": -1,
      "max_beats": "4",
      "outside": true,
      "resolve": false,
      "function": "resolving_dominant",
      "continuation": "Bounded dominant color. May continue through other chord tones/tensions rather than resolve immediately by step. Written exclusions and harmonic function remain binding."
    },
    {
      "id": "half_diminished_natural_sixth",
      "qualities": [
        "half_diminished"
      ],
      "degree": 13,
      "alter": 0,
      "max_beats": "4",
      "outside": false,
      "function": "predominant_to_dominant",
      "continuation": "Mapped Locrian-natural-sixth color preparing the third of the following dominant; excluded when not present in the selected collection or when that harmonic function is absent."
    }
  ],
  "resolution_gap": "1",
  "anticipation_max": "1",
  "suspensions": [
    {
      "id": "prepared_step_down",
      "preparation": "1/2",
      "max_delay": "1",
      "steps": [
        -1,
        -2
      ]
    }
  ],
  "sources": [
    "https://www.berklee.edu/berklee-today/summer-2014/tension-and-resolution",
    "https://college.berklee.edu/berklee-today-55"
  ]
}