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Validate Composition

validate_composition
Read-only

Dry-run a full Composition object against the SAME pure, DB-free authoring guards saveComposition enforces, WITHOUT persisting it (no project needed). Checks: wire shape (Zod), primitive membership (unknown_primitive / custom_missing_sourcecode), required-param shape (invalid_primitive_params), clip↔track family (clip_source_track_mismatch), and reframe coverage (reframe_coverage_gap). Always returns ONE shape — 200 { valid, errors, quote } — for BOTH malformed wire shapes and deep-invariant failures (so branch on valid, not on HTTP status); errors[] lists every problem at once as a sanitized envelope { code, stage, category, retryable, message, fix } you can fix before composing/rendering. The quote triple states the render price to finish from a valid composition — relay it to your human BEFORE create_render. valid:true means save-safe EXCEPT for the three genuinely DB-bound checks that can only run at save/render, because this tool takes no project: trim-bounds (needs the media duration), image/asset-on-a-video-track (needs the media kind), and componentId resolution (needs the installed components of YOUR org — a {kind:'component', componentId, props} clip naming a component you have not created, or naming a CATALOG PRIMITIVE, passes here and is refused at save with component_source_unavailable). Pass the Composition as body.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bodyYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
quoteNoThe A2 money triple for the commodity lane: validate is free; estimatedJourneyTotalUsd is the render price to finish from a valid composition — relay it BEFORE create_render.
validNo
errorsNo
contractNoThe contract this verdict was computed against (the kernel version the deployment runs). If it differs between two calls, the validator changed, not your composition.
warningsNoNon-blocking render-fidelity warnings detected before enqueue, including unavailable font families.
advisoriesNoDeterministic, render-free QUALITY floors (the SAME named defects the Director's in-loop verify and score_composition surface: static-hold, caption-spine, sfx-density, sfx-speech-collision, bed-coverage, audio-role). NON-blocking — they never flip `valid` (an editorially-weak composition still renders); fix them for quality, not to save. Empty when the composition is clean or the wire shape failed (they need a parsed composition).

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed13 schema fields changed
    • changedInput schema / $defs / __schema0 / anyOf
      Previous value: -[
      -  {
      -    "type": "string"
      -  },
      -  {
      -    "type": "number"
      -  },
      -  {
      -    "type": "boolean"
      -  },
      -  {
      -    "type": "null"
      -  },
      -  {
      -    "items": {
      -      "$ref": "#/$defs/__schema0"
      -    },
      -    "type": "array"
      -  },
      -  {
      -    "additionalProperties": {
      -      "$ref": "#/$defs/__schema0"
      -    },
      -    "propertyNames": {
      -      "type": "string"
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "type": "string"
      +  },
      +  {
      +    "type": "number"
      +  },
      +  {
      +    "type": "boolean"
      +  },
      +  {
      +    "type": "null"
      +  },
      +  {
      +    "items": {
      +      "$ref": "#/$defs/__schema0"
      +    },
      +    "type": "array"
      +  },
      +  {
      +    "additionalProperties": {
      +      "$ref": "#/$defs/__schema0"
      +    },
      +    "properties": {},
      +    "propertyNames": {
      +      "type": "string"
      +    },
      +    "type": "object"
      +  }
      +]
    • removedInput schema / properties / body / description
      Removed value: -"Canonical composition wire shape (multi-track; carries reframe, captions, markers)."
    • changedInput schema / properties / body / properties / accessibility / additionalProperties
      Previous value: -falseNew value: +{}
    • addedInput schema / properties / body / properties / acl
      Added value: +{
      +  "additionalProperties": {},
      +  "properties": {
      +    "public": {
      +      "type": "boolean"
      +    },
      +    "readerOrgIds": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "writerOrgIds": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    }
      +  },
      +  "readOnly": true,
      +  "type": "object"
      +}
    • removedInput schema / properties / body / properties / captions / anyOf
      Removed value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "from": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "clipId": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "clipId"
      -        ],
      -        "type": "object"
      -      },
      -      "layouts": {
      -        "items": {
      -          "additionalProperties": false,
      -          "properties": {
      -            "holdThroughWordIndex": {
      -              "description": "Inclusive saved-word index in this segment. The layout stays visible until that word ends.",
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            },
      -            "region": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "h": {
      -                  "exclusiveMinimum": 0,
      -                  "maximum": 1,
      -                  "type": "number"
      -                },
      -                "w": {
      -                  "exclusiveMinimum": 0,
      -                  "maximum": 1,
      -                  "type": "number"
      -                },
      -                "x": {
      -                  "maximum": 1,
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "y": {
      -                  "maximum": 1,
      -                  "minimum": 0,
      -                  "type": "number"
      -                }
      -              },
      -              "required": [
      -                "x",
      -                "y",
      -                "w",
      -                "h"
      -              ],
      -              "type": "object"
      -            },
      -            "rotation": {
      -              "maximum": 45,
      -              "minimum": -45,
      -              "type": "number"
      -            },
      -            "scale": {
      -              "maximum": 4,
      -              "minimum": 0.25,
      -              "type": "number"
      -            },
      -            "segmentIndex": {
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            },
      -            "style": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "annotationColor": {
      -                  "type": "string"
      -                },
      -                "annotationStrokeWidth": {
      -                  "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      -                  "maximum": 12,
      -                  "minimum": 0.5,
      -                  "type": "number"
      -                },
      -                "annotationTexture": {
      -                  "description": "Native annotation stroke finish; default clean.",
      -                  "enum": [
      -                    "clean",
      -                    "pencil"
      -                  ],
      -                  "type": "string"
      -                },
      -                "backgroundColor": {
      -                  "type": "string"
      -                },
      -                "color": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "emphasisColor": {
      -                  "type": "string"
      -                },
      -                "emphasisFontFamily": {
      -                  "type": "string"
      -                },
      -                "emphasisFontStyle": {
      -                  "enum": [
      -                    "normal",
      -                    "italic"
      -                  ],
      -                  "type": "string"
      -                },
      -                "emphasisFontWeight": {
      -                  "maximum": 900,
      -                  "minimum": 100,
      -                  "type": "integer"
      -                },
      -                "emphasisLetterSpacing": {
      -                  "type": "number"
      -                },
      -                "emphasisPlate": {
      -                  "type": "boolean"
      -                },
      -                "emphasisPlateAltColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlateAltTextColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlateColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlatePadX": {
      -                  "type": "number"
      -                },
      -                "emphasisPlatePadY": {
      -                  "type": "number"
      -                },
      -                "emphasisPlateRadius": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "emphasisPlateReveal": {
      -                  "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      -                  "type": "boolean"
      -                },
      -                "emphasisPlateTextColor": {
      -                  "type": "string"
      -                },
      -                "emphasisScale": {
      -                  "exclusiveMinimum": 0,
      -                  "type": "number"
      -                },
      -                "emphasisTextTransform": {
      -                  "enum": [
      -                    "none",
      -                    "uppercase",
      -                    "capitalize"
      -                  ],
      -                  "type": "string"
      -                },
      -                "entrance": {
      -                  "enum": [
      -                    "none",
      -                    "fade",
      -                    "word-pop",
      -                    "stagger-up"
      -                  ],
      -                  "type": "string"
      -                },
      -                "entranceMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "entranceStaggerMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "exitMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "fontFamily": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "fontSize": {
      -                  "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      -                  "maximum": 15,
      -                  "minimum": 1,
      -                  "type": "number"
      -                },
      -                "fontWeight": {
      -                  "maximum": 900,
      -                  "minimum": 100,
      -                  "type": "integer"
      -                },
      -                "highlightColor": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "letterSpacing": {
      -                  "description": "Base caption glyph spacing in pixels.",
      -                  "maximum": 20,
      -                  "minimum": -5,
      -                  "type": "number"
      -                },
      -                "lineGapEm": {
      -                  "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      -                  "maximum": 2,
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "plate": {
      -                  "enum": [
      -                    "glass",
      -                    "solid",
      -                    "none"
      -                  ],
      -                  "type": "string"
      -                },
      -                "textTransform": {
      -                  "enum": [
      -                    "none",
      -                    "uppercase",
      -                    "capitalize"
      -                  ],
      -                  "type": "string"
      -                },
      -                "wordGapEm": {
      -                  "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      -                  "maximum": 2,
      -                  "minimum": 0,
      -                  "type": "number"
      -                }
      -              },
      -              "type": "object"
      -            },
      -            "wordEndIndex": {
      -              "description": "Exclusive word index in the saved caption segment.",
      -              "exclusiveMinimum": 0,
      -              "maximum": 9007199254740991,
      -              "type": "integer"
      -            },
      -            "wordMarks": {
      -              "items": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "annotate": {
      -                    "anyOf": [
      -                      {
      -                        "enum": [
      -                          "circle",
      -                          "underline"
      -                        ],
      -                        "type": "string"
      -                      },
      -                      {
      -                        "type": "null"
      -                      }
      -                    ]
      -                  },
      -                  "emphasis": {
      -                    "type": "boolean"
      -                  },
      -                  "wordIndex": {
      -                    "maximum": 9007199254740991,
      -                    "minimum": 0,
      -                    "type": "integer"
      -                  }
      -                },
      -                "required": [
      -                  "wordIndex"
      -                ],
      -                "type": "object"
      -              },
      -              "type": "array"
      -            },
      -            "wordSignature": {
      -              "pattern": "^[a-f0-9]{64}$",
      -              "type": "string"
      -            },
      -            "wordStartIndex": {
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            }
      -          },
      -          "required": [
      -            "segmentIndex",
      -            "wordStartIndex",
      -            "wordEndIndex",
      -            "region",
      -            "wordSignature"
      -          ],
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "segments": {
      -        "items": {
      -          "additionalProperties": false,
      -          "properties": {
      -            "words": {
      -              "items": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "annotate": {
      -                    "enum": [
      -                      "circle",
      -                      "underline"
      -                    ],
      -                    "type": "string"
      -                  },
      -                  "emphasis": {
      -                    "type": "boolean"
      -                  },
      -                  "endMs": {
      -                    "description": "Word end on the composition timeline, in milliseconds.",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "startMs": {
      -                    "description": "Word start on the composition timeline, in milliseconds.",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "text": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  }
      -                },
      -                "required": [
      -                  "text",
      -                  "startMs",
      -                  "endMs"
      -                ],
      -                "type": "object"
      -              },
      -              "type": "array"
      -            }
      -          },
      -          "required": [
      -            "words"
      -          ],
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "source": {
      -        "const": "derived",
      -        "type": "string"
      -      },
      -      "style": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "annotationColor": {
      -            "type": "string"
      -          },
      -          "annotationStrokeWidth": {
      -            "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      -            "maximum": 12,
      -            "minimum": 0.5,
      -            "type": "number"
      -          },
      -          "annotationTexture": {
      -            "description": "Native annotation stroke finish; default clean.",
      -            "enum": [
      -              "clean",
      -              "pencil"
      -            ],
      -            "type": "string"
      -          },
      -          "backgroundColor": {
      -            "type": "string"
      -          },
      -          "color": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "emphasisColor": {
      -            "type": "string"
      -          },
      -          "emphasisFontFamily": {
      -            "type": "string"
      -          },
      -          "emphasisFontStyle": {
      -            "enum": [
      -              "normal",
      -              "italic"
      -            ],
      -            "type": "string"
      -          },
      -          "emphasisFontWeight": {
      -            "maximum": 900,
      -            "minimum": 100,
      -            "type": "integer"
      -          },
      -          "emphasisGradient": {
      -            "type": "string"
      -          },
      -          "emphasisLetterSpacing": {
      -            "type": "number"
      -          },
      -          "emphasisPlate": {
      -            "type": "boolean"
      -          },
      -          "emphasisPlateAltColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlateAltTextColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlateColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlatePadX": {
      -            "type": "number"
      -          },
      -          "emphasisPlatePadY": {
      -            "type": "number"
      -          },
      -          "emphasisPlateRadius": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "emphasisPlateReveal": {
      -            "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      -            "type": "boolean"
      -          },
      -          "emphasisPlateTextColor": {
      -            "type": "string"
      -          },
      -          "emphasisScale": {
      -            "exclusiveMinimum": 0,
      -            "type": "number"
      -          },
      -          "emphasisTextTransform": {
      -            "enum": [
      -              "none",
      -              "uppercase",
      -              "capitalize"
      -            ],
      -            "type": "string"
      -          },
      -          "entrance": {
      -            "enum": [
      -              "none",
      -              "fade",
      -              "word-pop",
      -              "stagger-up"
      -            ],
      -            "type": "string"
      -          },
      -          "entranceMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "entranceStaggerMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "exitMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "fontFamily": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "fontSize": {
      -            "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      -            "maximum": 15,
      -            "minimum": 1,
      -            "type": "number"
      -          },
      -          "fontWeight": {
      -            "maximum": 900,
      -            "minimum": 100,
      -            "type": "integer"
      -          },
      -          "highlightColor": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "letterSpacing": {
      -            "description": "Base caption glyph spacing in pixels.",
      -            "maximum": 20,
      -            "minimum": -5,
      -            "type": "number"
      -          },
      -          "lineGapEm": {
      -            "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      -            "maximum": 2,
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "maxWidthPercent": {
      -            "exclusiveMinimum": 0,
      -            "maximum": 100,
      -            "type": "number"
      -          },
      -          "plate": {
      -            "enum": [
      -              "glass",
      -              "solid",
      -              "none"
      -            ],
      -            "type": "string"
      -          },
      -          "position": {
      -            "enum": [
      -              "top",
      -              "center",
      -              "bottom"
      -            ],
      -            "type": "string"
      -          },
      -          "region": {
      -            "additionalProperties": false,
      -            "description": "Optional caption layout box {x,y,w,h} in normalized output-frame coordinates. Overrides position; text starts at its top edge and wraps/pages within its width and height.",
      -            "properties": {
      -              "h": {
      -                "exclusiveMinimum": 0,
      -                "maximum": 1,
      -                "type": "number"
      -              },
      -              "w": {
      -                "exclusiveMinimum": 0,
      -                "maximum": 1,
      -                "type": "number"
      -              },
      -              "x": {
      -                "maximum": 1,
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "y": {
      -                "maximum": 1,
      -                "minimum": 0,
      -                "type": "number"
      -              }
      -            },
      -            "required": [
      -              "x",
      -              "y",
      -              "w",
      -              "h"
      -            ],
      -            "type": "object"
      -          },
      -          "textTransform": {
      -            "enum": [
      -              "none",
      -              "uppercase",
      -              "capitalize"
      -            ],
      -            "type": "string"
      -          },
      -          "wordGapEm": {
      -            "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      -            "maximum": 2,
      -            "minimum": 0,
      -            "type": "number"
      -          }
      -        },
      -        "type": "object"
      -      },
      -      "zPlane": {
      -        "enum": [
      -          "front",
      -          "behind-subject"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "source",
      -      "from",
      -      "segments"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "layouts": {
      -        "items": {
      -          "additionalProperties": false,
      -          "properties": {
      -            "holdThroughWordIndex": {
      -              "description": "Inclusive saved-word index in this segment. The layout stays visible until that word ends.",
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            },
      -            "region": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "h": {
      -                  "exclusiveMinimum": 0,
      -                  "maximum": 1,
      -                  "type": "number"
      -                },
      -                "w": {
      -                  "exclusiveMinimum": 0,
      -                  "maximum": 1,
      -                  "type": "number"
      -                },
      -                "x": {
      -                  "maximum": 1,
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "y": {
      -                  "maximum": 1,
      -                  "minimum": 0,
      -                  "type": "number"
      -                }
      -              },
      -              "required": [
      -                "x",
      -                "y",
      -                "w",
      -                "h"
      -              ],
      -              "type": "object"
      -            },
      -            "rotation": {
      -              "maximum": 45,
      -              "minimum": -45,
      -              "type": "number"
      -            },
      -            "scale": {
      -              "maximum": 4,
      -              "minimum": 0.25,
      -              "type": "number"
      -            },
      -            "segmentIndex": {
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            },
      -            "style": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "annotationColor": {
      -                  "type": "string"
      -                },
      -                "annotationStrokeWidth": {
      -                  "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      -                  "maximum": 12,
      -                  "minimum": 0.5,
      -                  "type": "number"
      -                },
      -                "annotationTexture": {
      -                  "description": "Native annotation stroke finish; default clean.",
      -                  "enum": [
      -                    "clean",
      -                    "pencil"
      -                  ],
      -                  "type": "string"
      -                },
      -                "backgroundColor": {
      -                  "type": "string"
      -                },
      -                "color": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "emphasisColor": {
      -                  "type": "string"
      -                },
      -                "emphasisFontFamily": {
      -                  "type": "string"
      -                },
      -                "emphasisFontStyle": {
      -                  "enum": [
      -                    "normal",
      -                    "italic"
      -                  ],
      -                  "type": "string"
      -                },
      -                "emphasisFontWeight": {
      -                  "maximum": 900,
      -                  "minimum": 100,
      -                  "type": "integer"
      -                },
      -                "emphasisLetterSpacing": {
      -                  "type": "number"
      -                },
      -                "emphasisPlate": {
      -                  "type": "boolean"
      -                },
      -                "emphasisPlateAltColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlateAltTextColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlateColor": {
      -                  "type": "string"
      -                },
      -                "emphasisPlatePadX": {
      -                  "type": "number"
      -                },
      -                "emphasisPlatePadY": {
      -                  "type": "number"
      -                },
      -                "emphasisPlateRadius": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "emphasisPlateReveal": {
      -                  "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      -                  "type": "boolean"
      -                },
      -                "emphasisPlateTextColor": {
      -                  "type": "string"
      -                },
      -                "emphasisScale": {
      -                  "exclusiveMinimum": 0,
      -                  "type": "number"
      -                },
      -                "emphasisTextTransform": {
      -                  "enum": [
      -                    "none",
      -                    "uppercase",
      -                    "capitalize"
      -                  ],
      -                  "type": "string"
      -                },
      -                "entrance": {
      -                  "enum": [
      -                    "none",
      -                    "fade",
      -                    "word-pop",
      -                    "stagger-up"
      -                  ],
      -                  "type": "string"
      -                },
      -                "entranceMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "entranceStaggerMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "exitMs": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "fontFamily": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "fontSize": {
      -                  "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      -                  "maximum": 15,
      -                  "minimum": 1,
      -                  "type": "number"
      -                },
      -                "fontWeight": {
      -                  "maximum": 900,
      -                  "minimum": 100,
      -                  "type": "integer"
      -                },
      -                "highlightColor": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "letterSpacing": {
      -                  "description": "Base caption glyph spacing in pixels.",
      -                  "maximum": 20,
      -                  "minimum": -5,
      -                  "type": "number"
      -                },
      -                "lineGapEm": {
      -                  "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      -                  "maximum": 2,
      -                  "minimum": 0,
      -                  "type": "number"
      -                },
      -                "plate": {
      -                  "enum": [
      -                    "glass",
      -                    "solid",
      -                    "none"
      -                  ],
      -                  "type": "string"
      -                },
      -                "textTransform": {
      -                  "enum": [
      -                    "none",
      -                    "uppercase",
      -                    "capitalize"
      -                  ],
      -                  "type": "string"
      -                },
      -                "wordGapEm": {
      -                  "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      -                  "maximum": 2,
      -                  "minimum": 0,
      -                  "type": "number"
      -                }
      -              },
      -              "type": "object"
      -            },
      -            "wordEndIndex": {
      -              "description": "Exclusive word index in the saved caption segment.",
      -              "exclusiveMinimum": 0,
      -              "maximum": 9007199254740991,
      -              "type": "integer"
      -            },
      -            "wordMarks": {
      -              "items": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "annotate": {
      -                    "anyOf": [
      -                      {
      -                        "enum": [
      -                          "circle",
      -                          "underline"
      -                        ],
      -                        "type": "string"
      -                      },
      -                      {
      -                        "type": "null"
      -                      }
      -                    ]
      -                  },
      -                  "emphasis": {
      -                    "type": "boolean"
      -                  },
      -                  "wordIndex": {
      -                    "maximum": 9007199254740991,
      -                    "minimum": 0,
      -                    "type": "integer"
      -                  }
      -                },
      -                "required": [
      -                  "wordIndex"
      -                ],
      -                "type": "object"
      -              },
      -              "type": "array"
      -            },
      -            "wordSignature": {
      -              "pattern": "^[a-f0-9]{64}$",
      -              "type": "string"
      -            },
      -            "wordStartIndex": {
      -              "maximum": 9007199254740991,
      -              "minimum": 0,
      -              "type": "integer"
      -            }
      -          },
      -          "required": [
      -            "segmentIndex",
      -            "wordStartIndex",
      -            "wordEndIndex",
      -            "region",
      -            "wordSignature"
      -          ],
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "segments": {
      -        "items": {
      -          "additionalProperties": false,
      -          "properties": {
      -            "words": {
      -              "items": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "annotate": {
      -                    "enum": [
      -                      "circle",
      -                      "underline"
      -                    ],
      -                    "type": "string"
      -                  },
      -                  "emphasis": {
      -                    "type": "boolean"
      -                  },
      -                  "endMs": {
      -                    "description": "Word end on the composition timeline, in milliseconds.",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "startMs": {
      -                    "description": "Word start on the composition timeline, in milliseconds.",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "text": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  }
      -                },
      -                "required": [
      -                  "text",
      -                  "startMs",
      -                  "endMs"
      -                ],
      -                "type": "object"
      -              },
      -              "type": "array"
      -            }
      -          },
      -          "required": [
      -            "words"
      -          ],
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "source": {
      -        "const": "authored",
      -        "type": "string"
      -      },
      -      "style": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "annotationColor": {
      -            "type": "string"
      -          },
      -          "annotationStrokeWidth": {
      -            "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      -            "maximum": 12,
      -            "minimum": 0.5,
      -            "type": "number"
      -          },
      -          "annotationTexture": {
      -            "description": "Native annotation stroke finish; default clean.",
      -            "enum": [
      -              "clean",
      -              "pencil"
      -            ],
      -            "type": "string"
      -          },
      -          "backgroundColor": {
      -            "type": "string"
      -          },
      -          "color": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "emphasisColor": {
      -            "type": "string"
      -          },
      -          "emphasisFontFamily": {
      -            "type": "string"
      -          },
      -          "emphasisFontStyle": {
      -            "enum": [
      -              "normal",
      -              "italic"
      -            ],
      -            "type": "string"
      -          },
      -          "emphasisFontWeight": {
      -            "maximum": 900,
      -            "minimum": 100,
      -            "type": "integer"
      -          },
      -          "emphasisGradient": {
      -            "type": "string"
      -          },
      -          "emphasisLetterSpacing": {
      -            "type": "number"
      -          },
      -          "emphasisPlate": {
      -            "type": "boolean"
      -          },
      -          "emphasisPlateAltColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlateAltTextColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlateColor": {
      -            "type": "string"
      -          },
      -          "emphasisPlatePadX": {
      -            "type": "number"
      -          },
      -          "emphasisPlatePadY": {
      -            "type": "number"
      -          },
      -          "emphasisPlateRadius": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "emphasisPlateReveal": {
      -            "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      -            "type": "boolean"
      -          },
      -          "emphasisPlateTextColor": {
      -            "type": "string"
      -          },
      -          "emphasisScale": {
      -            "exclusiveMinimum": 0,
      -            "type": "number"
      -          },
      -          "emphasisTextTransform": {
      -            "enum": [
      -              "none",
      -              "uppercase",
      -              "capitalize"
      -            ],
      -            "type": "string"
      -          },
      -          "entrance": {
      -            "enum": [
      -              "none",
      -              "fade",
      -              "word-pop",
      -              "stagger-up"
      -            ],
      -            "type": "string"
      -          },
      -          "entranceMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "entranceStaggerMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "exitMs": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "fontFamily": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "fontSize": {
      -            "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      -            "maximum": 15,
      -            "minimum": 1,
      -            "type": "number"
      -          },
      -          "fontWeight": {
      -            "maximum": 900,
      -            "minimum": 100,
      -            "type": "integer"
      -          },
      -          "highlightColor": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "letterSpacing": {
      -            "description": "Base caption glyph spacing in pixels.",
      -            "maximum": 20,
      -            "minimum": -5,
      -            "type": "number"
      -          },
      -          "lineGapEm": {
      -            "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      -            "maximum": 2,
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "maxWidthPercent": {
      -            "exclusiveMinimum": 0,
      -            "maximum": 100,
      -            "type": "number"
      -          },
      -          "plate": {
      -            "enum": [
      -              "glass",
      -              "solid",
      -              "none"
      -            ],
      -            "type": "string"
      -          },
      -          "position": {
      -            "enum": [
      -              "top",
      -              "center",
      -              "bottom"
      -            ],
      -            "type": "string"
      -          },
      -          "region": {
      -            "additionalProperties": false,
      -            "description": "Optional caption layout box {x,y,w,h} in normalized output-frame coordinates. Overrides position; text starts at its top edge and wraps/pages within its width and height.",
      -            "properties": {
      -              "h": {
      -                "exclusiveMinimum": 0,
      -                "maximum": 1,
      -                "type": "number"
      -              },
      -              "w": {
      -                "exclusiveMinimum": 0,
      -                "maximum": 1,
      -                "type": "number"
      -              },
      -              "x": {
      -                "maximum": 1,
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "y": {
      -                "maximum": 1,
      -                "minimum": 0,
      -                "type": "number"
      -              }
      -            },
      -            "required": [
      -              "x",
      -              "y",
      -              "w",
      -              "h"
      -            ],
      -            "type": "object"
      -          },
      -          "textTransform": {
      -            "enum": [
      -              "none",
      -              "uppercase",
      -              "capitalize"
      -            ],
      -            "type": "string"
      -          },
      -          "wordGapEm": {
      -            "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      -            "maximum": 2,
      -            "minimum": 0,
      -            "type": "number"
      -          }
      -        },
      -        "type": "object"
      -      },
      -      "zPlane": {
      -        "enum": [
      -          "front",
      -          "behind-subject"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "source",
      -      "segments"
      -    ],
      -    "type": "object"
      -  }
      -]
    • addedInput schema / properties / body / properties / captions / oneOf
      Added value: +[
      +  {
      +    "additionalProperties": {},
      +    "properties": {
      +      "from": {
      +        "additionalProperties": {},
      +        "properties": {
      +          "clipId": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "clipId"
      +        ],
      +        "type": "object"
      +      },
      +      "layouts": {
      +        "items": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "holdThroughWordIndex": {
      +              "description": "Inclusive saved-word index in this segment. The layout stays visible until that word ends.",
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            },
      +            "region": {
      +              "additionalProperties": {},
      +              "properties": {
      +                "h": {
      +                  "exclusiveMinimum": 0,
      +                  "maximum": 1,
      +                  "type": "number"
      +                },
      +                "w": {
      +                  "exclusiveMinimum": 0,
      +                  "maximum": 1,
      +                  "type": "number"
      +                },
      +                "x": {
      +                  "maximum": 1,
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "y": {
      +                  "maximum": 1,
      +                  "minimum": 0,
      +                  "type": "number"
      +                }
      +              },
      +              "required": [
      +                "x",
      +                "y",
      +                "w",
      +                "h"
      +              ],
      +              "type": "object"
      +            },
      +            "rotation": {
      +              "maximum": 45,
      +              "minimum": -45,
      +              "type": "number"
      +            },
      +            "scale": {
      +              "maximum": 4,
      +              "minimum": 0.25,
      +              "type": "number"
      +            },
      +            "segmentIndex": {
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            },
      +            "style": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "annotationColor": {
      +                  "type": "string"
      +                },
      +                "annotationStrokeWidth": {
      +                  "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      +                  "maximum": 12,
      +                  "minimum": 0.5,
      +                  "type": "number"
      +                },
      +                "annotationTexture": {
      +                  "description": "Native annotation stroke finish; default clean.",
      +                  "enum": [
      +                    "clean",
      +                    "pencil"
      +                  ],
      +                  "type": "string"
      +                },
      +                "backgroundColor": {
      +                  "type": "string"
      +                },
      +                "color": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "emphasisColor": {
      +                  "type": "string"
      +                },
      +                "emphasisFontFamily": {
      +                  "type": "string"
      +                },
      +                "emphasisFontStyle": {
      +                  "enum": [
      +                    "normal",
      +                    "italic"
      +                  ],
      +                  "type": "string"
      +                },
      +                "emphasisFontWeight": {
      +                  "maximum": 900,
      +                  "minimum": 100,
      +                  "type": "integer"
      +                },
      +                "emphasisLetterSpacing": {
      +                  "type": "number"
      +                },
      +                "emphasisPlate": {
      +                  "type": "boolean"
      +                },
      +                "emphasisPlateAltColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlateAltTextColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlateColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlatePadX": {
      +                  "type": "number"
      +                },
      +                "emphasisPlatePadY": {
      +                  "type": "number"
      +                },
      +                "emphasisPlateRadius": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "emphasisPlateReveal": {
      +                  "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      +                  "type": "boolean"
      +                },
      +                "emphasisPlateTextColor": {
      +                  "type": "string"
      +                },
      +                "emphasisScale": {
      +                  "exclusiveMinimum": 0,
      +                  "type": "number"
      +                },
      +                "emphasisTextTransform": {
      +                  "enum": [
      +                    "none",
      +                    "uppercase",
      +                    "capitalize"
      +                  ],
      +                  "type": "string"
      +                },
      +                "entrance": {
      +                  "enum": [
      +                    "none",
      +                    "fade",
      +                    "word-pop",
      +                    "stagger-up"
      +                  ],
      +                  "type": "string"
      +                },
      +                "entranceMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "entranceStaggerMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "exitMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "fontFamily": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "fontSize": {
      +                  "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      +                  "maximum": 15,
      +                  "minimum": 1,
      +                  "type": "number"
      +                },
      +                "fontWeight": {
      +                  "maximum": 900,
      +                  "minimum": 100,
      +                  "type": "integer"
      +                },
      +                "highlightColor": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "letterSpacing": {
      +                  "description": "Base caption glyph spacing in pixels.",
      +                  "maximum": 20,
      +                  "minimum": -5,
      +                  "type": "number"
      +                },
      +                "lineGapEm": {
      +                  "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      +                  "maximum": 2,
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "plate": {
      +                  "enum": [
      +                    "glass",
      +                    "solid",
      +                    "none"
      +                  ],
      +                  "type": "string"
      +                },
      +                "textTransform": {
      +                  "enum": [
      +                    "none",
      +                    "uppercase",
      +                    "capitalize"
      +                  ],
      +                  "type": "string"
      +                },
      +                "wordGapEm": {
      +                  "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      +                  "maximum": 2,
      +                  "minimum": 0,
      +                  "type": "number"
      +                }
      +              },
      +              "type": "object"
      +            },
      +            "wordEndIndex": {
      +              "description": "Exclusive word index in the saved caption segment.",
      +              "exclusiveMinimum": 0,
      +              "maximum": 9007199254740991,
      +              "type": "integer"
      +            },
      +            "wordMarks": {
      +              "items": {
      +                "additionalProperties": false,
      +                "properties": {
      +                  "annotate": {
      +                    "anyOf": [
      +                      {
      +                        "enum": [
      +                          "circle",
      +                          "underline"
      +                        ],
      +                        "type": "string"
      +                      },
      +                      {
      +                        "type": "null"
      +                      }
      +                    ]
      +                  },
      +                  "emphasis": {
      +                    "type": "boolean"
      +                  },
      +                  "wordIndex": {
      +                    "maximum": 9007199254740991,
      +                    "minimum": 0,
      +                    "type": "integer"
      +                  }
      +                },
      +                "required": [
      +                  "wordIndex"
      +                ],
      +                "type": "object"
      +              },
      +              "type": "array"
      +            },
      +            "wordSignature": {
      +              "pattern": "^[a-f0-9]{64}$",
      +              "type": "string"
      +            },
      +            "wordStartIndex": {
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            }
      +          },
      +          "required": [
      +            "segmentIndex",
      +            "wordStartIndex",
      +            "wordEndIndex",
      +            "region",
      +            "wordSignature"
      +          ],
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "segments": {
      +        "items": {
      +          "additionalProperties": {},
      +          "properties": {
      +            "words": {
      +              "items": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "annotate": {
      +                    "enum": [
      +                      "circle",
      +                      "underline"
      +                    ],
      +                    "type": "string"
      +                  },
      +                  "emphasis": {
      +                    "type": "boolean"
      +                  },
      +                  "endMs": {
      +                    "description": "Word end on the composition timeline, in milliseconds.",
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "startMs": {
      +                    "description": "Word start on the composition timeline, in milliseconds.",
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "text": {
      +                    "minLength": 1,
      +                    "type": "string"
      +                  }
      +                },
      +                "required": [
      +                  "text",
      +                  "startMs",
      +                  "endMs"
      +                ],
      +                "type": "object"
      +              },
      +              "type": "array"
      +            }
      +          },
      +          "required": [
      +            "words"
      +          ],
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "source": {
      +        "const": "derived",
      +        "type": "string"
      +      },
      +      "style": {
      +        "additionalProperties": {},
      +        "properties": {
      +          "annotationColor": {
      +            "type": "string"
      +          },
      +          "annotationStrokeWidth": {
      +            "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      +            "maximum": 12,
      +            "minimum": 0.5,
      +            "type": "number"
      +          },
      +          "annotationTexture": {
      +            "description": "Native annotation stroke finish; default clean.",
      +            "enum": [
      +              "clean",
      +              "pencil"
      +            ],
      +            "type": "string"
      +          },
      +          "backgroundColor": {
      +            "type": "string"
      +          },
      +          "color": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "emphasisColor": {
      +            "type": "string"
      +          },
      +          "emphasisFontFamily": {
      +            "type": "string"
      +          },
      +          "emphasisFontStyle": {
      +            "enum": [
      +              "normal",
      +              "italic"
      +            ],
      +            "type": "string"
      +          },
      +          "emphasisFontWeight": {
      +            "maximum": 900,
      +            "minimum": 100,
      +            "type": "integer"
      +          },
      +          "emphasisGradient": {
      +            "type": "string"
      +          },
      +          "emphasisLetterSpacing": {
      +            "type": "number"
      +          },
      +          "emphasisPlate": {
      +            "type": "boolean"
      +          },
      +          "emphasisPlateAltColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlateAltTextColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlateColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlatePadX": {
      +            "type": "number"
      +          },
      +          "emphasisPlatePadY": {
      +            "type": "number"
      +          },
      +          "emphasisPlateRadius": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "emphasisPlateReveal": {
      +            "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      +            "type": "boolean"
      +          },
      +          "emphasisPlateTextColor": {
      +            "type": "string"
      +          },
      +          "emphasisScale": {
      +            "exclusiveMinimum": 0,
      +            "type": "number"
      +          },
      +          "emphasisTextTransform": {
      +            "enum": [
      +              "none",
      +              "uppercase",
      +              "capitalize"
      +            ],
      +            "type": "string"
      +          },
      +          "entrance": {
      +            "enum": [
      +              "none",
      +              "fade",
      +              "word-pop",
      +              "stagger-up"
      +            ],
      +            "type": "string"
      +          },
      +          "entranceMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "entranceStaggerMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "exitMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "fontFamily": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "fontSize": {
      +            "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      +            "maximum": 15,
      +            "minimum": 1,
      +            "type": "number"
      +          },
      +          "fontWeight": {
      +            "maximum": 900,
      +            "minimum": 100,
      +            "type": "integer"
      +          },
      +          "highlightColor": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "letterSpacing": {
      +            "description": "Base caption glyph spacing in pixels.",
      +            "maximum": 20,
      +            "minimum": -5,
      +            "type": "number"
      +          },
      +          "lineGapEm": {
      +            "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      +            "maximum": 2,
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "maxWidthPercent": {
      +            "exclusiveMinimum": 0,
      +            "maximum": 100,
      +            "type": "number"
      +          },
      +          "plate": {
      +            "enum": [
      +              "glass",
      +              "solid",
      +              "none"
      +            ],
      +            "type": "string"
      +          },
      +          "position": {
      +            "enum": [
      +              "top",
      +              "center",
      +              "bottom"
      +            ],
      +            "type": "string"
      +          },
      +          "region": {
      +            "additionalProperties": {},
      +            "description": "Optional caption layout box {x,y,w,h} in normalized output-frame coordinates. Overrides position; text starts at its top edge and wraps/pages within its width and height.",
      +            "properties": {
      +              "h": {
      +                "exclusiveMinimum": 0,
      +                "maximum": 1,
      +                "type": "number"
      +              },
      +              "w": {
      +                "exclusiveMinimum": 0,
      +                "maximum": 1,
      +                "type": "number"
      +              },
      +              "x": {
      +                "maximum": 1,
      +                "minimum": 0,
      +                "type": "number"
      +              },
      +              "y": {
      +                "maximum": 1,
      +                "minimum": 0,
      +                "type": "number"
      +              }
      +            },
      +            "required": [
      +              "x",
      +              "y",
      +              "w",
      +              "h"
      +            ],
      +            "type": "object"
      +          },
      +          "textTransform": {
      +            "enum": [
      +              "none",
      +              "uppercase",
      +              "capitalize"
      +            ],
      +            "type": "string"
      +          },
      +          "wordGapEm": {
      +            "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      +            "maximum": 2,
      +            "minimum": 0,
      +            "type": "number"
      +          }
      +        },
      +        "type": "object"
      +      },
      +      "zPlane": {
      +        "enum": [
      +          "front",
      +          "behind-subject"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "source",
      +      "from",
      +      "segments"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": {},
      +    "properties": {
      +      "layouts": {
      +        "items": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "holdThroughWordIndex": {
      +              "description": "Inclusive saved-word index in this segment. The layout stays visible until that word ends.",
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            },
      +            "region": {
      +              "additionalProperties": {},
      +              "properties": {
      +                "h": {
      +                  "exclusiveMinimum": 0,
      +                  "maximum": 1,
      +                  "type": "number"
      +                },
      +                "w": {
      +                  "exclusiveMinimum": 0,
      +                  "maximum": 1,
      +                  "type": "number"
      +                },
      +                "x": {
      +                  "maximum": 1,
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "y": {
      +                  "maximum": 1,
      +                  "minimum": 0,
      +                  "type": "number"
      +                }
      +              },
      +              "required": [
      +                "x",
      +                "y",
      +                "w",
      +                "h"
      +              ],
      +              "type": "object"
      +            },
      +            "rotation": {
      +              "maximum": 45,
      +              "minimum": -45,
      +              "type": "number"
      +            },
      +            "scale": {
      +              "maximum": 4,
      +              "minimum": 0.25,
      +              "type": "number"
      +            },
      +            "segmentIndex": {
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            },
      +            "style": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "annotationColor": {
      +                  "type": "string"
      +                },
      +                "annotationStrokeWidth": {
      +                  "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      +                  "maximum": 12,
      +                  "minimum": 0.5,
      +                  "type": "number"
      +                },
      +                "annotationTexture": {
      +                  "description": "Native annotation stroke finish; default clean.",
      +                  "enum": [
      +                    "clean",
      +                    "pencil"
      +                  ],
      +                  "type": "string"
      +                },
      +                "backgroundColor": {
      +                  "type": "string"
      +                },
      +                "color": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "emphasisColor": {
      +                  "type": "string"
      +                },
      +                "emphasisFontFamily": {
      +                  "type": "string"
      +                },
      +                "emphasisFontStyle": {
      +                  "enum": [
      +                    "normal",
      +                    "italic"
      +                  ],
      +                  "type": "string"
      +                },
      +                "emphasisFontWeight": {
      +                  "maximum": 900,
      +                  "minimum": 100,
      +                  "type": "integer"
      +                },
      +                "emphasisLetterSpacing": {
      +                  "type": "number"
      +                },
      +                "emphasisPlate": {
      +                  "type": "boolean"
      +                },
      +                "emphasisPlateAltColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlateAltTextColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlateColor": {
      +                  "type": "string"
      +                },
      +                "emphasisPlatePadX": {
      +                  "type": "number"
      +                },
      +                "emphasisPlatePadY": {
      +                  "type": "number"
      +                },
      +                "emphasisPlateRadius": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "emphasisPlateReveal": {
      +                  "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      +                  "type": "boolean"
      +                },
      +                "emphasisPlateTextColor": {
      +                  "type": "string"
      +                },
      +                "emphasisScale": {
      +                  "exclusiveMinimum": 0,
      +                  "type": "number"
      +                },
      +                "emphasisTextTransform": {
      +                  "enum": [
      +                    "none",
      +                    "uppercase",
      +                    "capitalize"
      +                  ],
      +                  "type": "string"
      +                },
      +                "entrance": {
      +                  "enum": [
      +                    "none",
      +                    "fade",
      +                    "word-pop",
      +                    "stagger-up"
      +                  ],
      +                  "type": "string"
      +                },
      +                "entranceMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "entranceStaggerMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "exitMs": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "fontFamily": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "fontSize": {
      +                  "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      +                  "maximum": 15,
      +                  "minimum": 1,
      +                  "type": "number"
      +                },
      +                "fontWeight": {
      +                  "maximum": 900,
      +                  "minimum": 100,
      +                  "type": "integer"
      +                },
      +                "highlightColor": {
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "letterSpacing": {
      +                  "description": "Base caption glyph spacing in pixels.",
      +                  "maximum": 20,
      +                  "minimum": -5,
      +                  "type": "number"
      +                },
      +                "lineGapEm": {
      +                  "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      +                  "maximum": 2,
      +                  "minimum": 0,
      +                  "type": "number"
      +                },
      +                "plate": {
      +                  "enum": [
      +                    "glass",
      +                    "solid",
      +                    "none"
      +                  ],
      +                  "type": "string"
      +                },
      +                "textTransform": {
      +                  "enum": [
      +                    "none",
      +                    "uppercase",
      +                    "capitalize"
      +                  ],
      +                  "type": "string"
      +                },
      +                "wordGapEm": {
      +                  "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      +                  "maximum": 2,
      +                  "minimum": 0,
      +                  "type": "number"
      +                }
      +              },
      +              "type": "object"
      +            },
      +            "wordEndIndex": {
      +              "description": "Exclusive word index in the saved caption segment.",
      +              "exclusiveMinimum": 0,
      +              "maximum": 9007199254740991,
      +              "type": "integer"
      +            },
      +            "wordMarks": {
      +              "items": {
      +                "additionalProperties": false,
      +                "properties": {
      +                  "annotate": {
      +                    "anyOf": [
      +                      {
      +                        "enum": [
      +                          "circle",
      +                          "underline"
      +                        ],
      +                        "type": "string"
      +                      },
      +                      {
      +                        "type": "null"
      +                      }
      +                    ]
      +                  },
      +                  "emphasis": {
      +                    "type": "boolean"
      +                  },
      +                  "wordIndex": {
      +                    "maximum": 9007199254740991,
      +                    "minimum": 0,
      +                    "type": "integer"
      +                  }
      +                },
      +                "required": [
      +                  "wordIndex"
      +                ],
      +                "type": "object"
      +              },
      +              "type": "array"
      +            },
      +            "wordSignature": {
      +              "pattern": "^[a-f0-9]{64}$",
      +              "type": "string"
      +            },
      +            "wordStartIndex": {
      +              "maximum": 9007199254740991,
      +              "minimum": 0,
      +              "type": "integer"
      +            }
      +          },
      +          "required": [
      +            "segmentIndex",
      +            "wordStartIndex",
      +            "wordEndIndex",
      +            "region",
      +            "wordSignature"
      +          ],
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "segments": {
      +        "items": {
      +          "additionalProperties": {},
      +          "properties": {
      +            "words": {
      +              "items": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "annotate": {
      +                    "enum": [
      +                      "circle",
      +                      "underline"
      +                    ],
      +                    "type": "string"
      +                  },
      +                  "emphasis": {
      +                    "type": "boolean"
      +                  },
      +                  "endMs": {
      +                    "description": "Word end on the composition timeline, in milliseconds.",
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "startMs": {
      +                    "description": "Word start on the composition timeline, in milliseconds.",
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "text": {
      +                    "minLength": 1,
      +                    "type": "string"
      +                  }
      +                },
      +                "required": [
      +                  "text",
      +                  "startMs",
      +                  "endMs"
      +                ],
      +                "type": "object"
      +              },
      +              "type": "array"
      +            }
      +          },
      +          "required": [
      +            "words"
      +          ],
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "source": {
      +        "const": "authored",
      +        "type": "string"
      +      },
      +      "style": {
      +        "additionalProperties": {},
      +        "properties": {
      +          "annotationColor": {
      +            "type": "string"
      +          },
      +          "annotationStrokeWidth": {
      +            "description": "Annotation stroke width in its 100×100 SVG coordinate system; default 4.",
      +            "maximum": 12,
      +            "minimum": 0.5,
      +            "type": "number"
      +          },
      +          "annotationTexture": {
      +            "description": "Native annotation stroke finish; default clean.",
      +            "enum": [
      +              "clean",
      +              "pencil"
      +            ],
      +            "type": "string"
      +          },
      +          "backgroundColor": {
      +            "type": "string"
      +          },
      +          "color": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "emphasisColor": {
      +            "type": "string"
      +          },
      +          "emphasisFontFamily": {
      +            "type": "string"
      +          },
      +          "emphasisFontStyle": {
      +            "enum": [
      +              "normal",
      +              "italic"
      +            ],
      +            "type": "string"
      +          },
      +          "emphasisFontWeight": {
      +            "maximum": 900,
      +            "minimum": 100,
      +            "type": "integer"
      +          },
      +          "emphasisGradient": {
      +            "type": "string"
      +          },
      +          "emphasisLetterSpacing": {
      +            "type": "number"
      +          },
      +          "emphasisPlate": {
      +            "type": "boolean"
      +          },
      +          "emphasisPlateAltColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlateAltTextColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlateColor": {
      +            "type": "string"
      +          },
      +          "emphasisPlatePadX": {
      +            "type": "number"
      +          },
      +          "emphasisPlatePadY": {
      +            "type": "number"
      +          },
      +          "emphasisPlateRadius": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "emphasisPlateReveal": {
      +            "description": "Grow a shared emphasis plate as saved words appear while reserving its final layout width.",
      +            "type": "boolean"
      +          },
      +          "emphasisPlateTextColor": {
      +            "type": "string"
      +          },
      +          "emphasisScale": {
      +            "exclusiveMinimum": 0,
      +            "type": "number"
      +          },
      +          "emphasisTextTransform": {
      +            "enum": [
      +              "none",
      +              "uppercase",
      +              "capitalize"
      +            ],
      +            "type": "string"
      +          },
      +          "entrance": {
      +            "enum": [
      +              "none",
      +              "fade",
      +              "word-pop",
      +              "stagger-up"
      +            ],
      +            "type": "string"
      +          },
      +          "entranceMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "entranceStaggerMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "exitMs": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "fontFamily": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "fontSize": {
      +            "description": "Font size as % of composition height (1-15, default 5). NOT px.",
      +            "maximum": 15,
      +            "minimum": 1,
      +            "type": "number"
      +          },
      +          "fontWeight": {
      +            "maximum": 900,
      +            "minimum": 100,
      +            "type": "integer"
      +          },
      +          "highlightColor": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "letterSpacing": {
      +            "description": "Base caption glyph spacing in pixels.",
      +            "maximum": 20,
      +            "minimum": -5,
      +            "type": "number"
      +          },
      +          "lineGapEm": {
      +            "description": "Gap between caption lines as a multiple of base font size; default 0.25.",
      +            "maximum": 2,
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "maxWidthPercent": {
      +            "exclusiveMinimum": 0,
      +            "maximum": 100,
      +            "type": "number"
      +          },
      +          "plate": {
      +            "enum": [
      +              "glass",
      +              "solid",
      +              "none"
      +            ],
      +            "type": "string"
      +          },
      +          "position": {
      +            "enum": [
      +              "top",
      +              "center",
      +              "bottom"
      +            ],
      +            "type": "string"
      +          },
      +          "region": {
      +            "additionalProperties": {},
      +            "description": "Optional caption layout box {x,y,w,h} in normalized output-frame coordinates. Overrides position; text starts at its top edge and wraps/pages within its width and height.",
      +            "properties": {
      +              "h": {
      +                "exclusiveMinimum": 0,
      +                "maximum": 1,
      +                "type": "number"
      +              },
      +              "w": {
      +                "exclusiveMinimum": 0,
      +                "maximum": 1,
      +                "type": "number"
      +              },
      +              "x": {
      +                "maximum": 1,
      +                "minimum": 0,
      +                "type": "number"
      +              },
      +              "y": {
      +                "maximum": 1,
      +                "minimum": 0,
      +                "type": "number"
      +              }
      +            },
      +            "required": [
      +              "x",
      +              "y",
      +              "w",
      +              "h"
      +            ],
      +            "type": "object"
      +          },
      +          "textTransform": {
      +            "enum": [
      +              "none",
      +              "uppercase",
      +              "capitalize"
      +            ],
      +            "type": "string"
      +          },
      +          "wordGapEm": {
      +            "description": "Gap between caption runs as a multiple of base font size; default 0.35.",
      +            "maximum": 2,
      +            "minimum": 0,
      +            "type": "number"
      +          }
      +        },
      +        "type": "object"
      +      },
      +      "zPlane": {
      +        "enum": [
      +          "front",
      +          "behind-subject"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "source",
      +      "segments"
      +    ],
      +    "type": "object"
      +  }
      +]
    • changedInput schema / properties / body / properties / format / additionalProperties
      Previous value: -falseNew value: +{}
    • changedInput schema / properties / body / properties / license / additionalProperties
      Previous value: -falseNew value: +{}
    • addedInput schema / properties / body / properties / licenseVerification
      Added value: +{
      +  "enum": [
      +    "attested",
      +    "cueframe-verified",
      +    "third-party-verified"
      +  ],
      +  "readOnly": true,
      +  "type": "string"
      +}
    • addedInput schema / properties / body / properties / markers / items / properties / metadata / properties
      Added value: +{}
    • addedInput schema / properties / body / properties / ownerOrgId
      Added value: +{
      +  "readOnly": true,
      +  "type": "string"
      +}
    • addedInput schema / properties / body / properties / sourceSuggestionId
      Added value: +{
      +  "readOnly": true,
      +  "type": "string"
      +}
    • changedInput schema / properties / body / properties / tracks / items / properties / contents / items / anyOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "animate": {
      -        "additionalProperties": {
      -          "items": {
      -            "additionalProperties": false,
      -            "properties": {
      -              "easing": {
      -                "anyOf": [
      -                  {
      -                    "enum": [
      -                      "linear",
      -                      "ease",
      -                      "easeIn",
      -                      "easeOut",
      -                      "easeInOut"
      -                    ],
      -                    "type": "string"
      -                  },
      -                  {
      -                    "additionalProperties": false,
      -                    "properties": {
      -                      "cubicBezier": {
      -                        "items": false,
      -                        "maxItems": 4,
      -                        "minItems": 4,
      -                        "prefixItems": [
      -                          {
      -                            "type": "number"
      -                          },
      -                          {
      -                            "type": "number"
      -                          },
      -                          {
      -                            "type": "number"
      -                          },
      -                          {
      -                            "type": "number"
      -                          }
      -                        ],
      -                        "type": "array"
      -                      }
      -                    },
      -                    "required": [
      -                      "cubicBezier"
      -                    ],
      -                    "type": "object"
      -                  }
      -                ]
      -              },
      -              "time": {
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "value": {
      -                "type": "number"
      -              }
      -            },
      -            "required": [
      -              "time",
      -              "value"
      -            ],
      -            "type": "object"
      -          },
      -          "minItems": 2,
      -          "type": "array"
      -        },
      -        "description": "Keyframe channels, clip-relative seconds. Each channel's values use the SAME unit as the scalar it animates: `opacity` 0 to 1, `scale` a multiplier (>0), `rotation` degrees, `position.x`/`position.y` a FRACTION of the frame like `position` (0.5 = centre; NOT pixels), `volume` 0 to 4.",
      -        "propertyNames": {
      -          "type": "string"
      -        },
      -        "type": "object"
      -      },
      -      "captionVisibility": {
      -        "description": "Video media clip only. Hide native captions while this clip is topmost and covers the lower picture, or when an opaque, effect-free clip has an explicitly full-frame region, even with fit:contain. Caption words and timings remain stored and resume when another visible clip takes over.",
      -        "enum": [
      -          "visible",
      -          "hidden"
      -        ],
      -        "type": "string"
      -      },
      -      "duration": {
      -        "description": "Clip duration (seconds).",
      -        "exclusiveMinimum": 0,
      -        "type": "number"
      -      },
      -      "effects": {
      -        "items": {
      -          "additionalProperties": false,
      -          "properties": {
      -            "component": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "assets": {
      -                  "additionalProperties": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "propertyNames": {
      -                    "type": "string"
      -                  },
      -                  "type": "object"
      -                },
      -                "componentId": {
      -                  "maxLength": 256,
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "mediaBindings": {
      -                  "additionalProperties": {
      -                    "items": {
      -                      "maxLength": 128,
      -                      "minLength": 1,
      -                      "type": "string"
      -                    },
      -                    "type": "array"
      -                  },
      -                  "propertyNames": {
      -                    "type": "string"
      -                  },
      -                  "type": "object"
      -                },
      -                "params": {
      -                  "additionalProperties": {
      -                    "$ref": "#/$defs/__schema0"
      -                  },
      -                  "propertyNames": {
      -                    "type": "string"
      -                  },
      -                  "type": "object"
      -                },
      -                "seed": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "sourceVersionId": {
      -                  "pattern": "^[a-f0-9]{64}$",
      -                  "type": "string"
      -                },
      -                "version": {
      -                  "const": 3,
      -                  "type": "number"
      -                }
      -              },
      -              "required": [
      -                "version",
      -                "componentId",
      -                "sourceVersionId",
      -                "params",
      -                "seed"
      -              ],
      -              "type": "object"
      -            },
      -            "id": {
      -              "minLength": 1,
      -              "type": "string"
      -            },
      -            "params": {
      -              "additionalProperties": {},
      -              "propertyNames": {
      -                "type": "string"
      -              },
      -              "type": "object"
      -            },
      -            "primitiveId": {
      -              "minLength": 1,
      -              "type": "string"
      -            },
      -            "window": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "duration": {
      -                  "exclusiveMinimum": 0,
      -                  "type": "number"
      -                },
      -                "startTime": {
      -                  "minimum": 0,
      -                  "type": "number"
      -                }
      -              },
      -              "required": [
      -                "startTime",
      -                "duration"
      -              ],
      -              "type": "object"
      -            }
      -          },
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "fit": {
      -        "enum": [
      -          "cover",
      -          "contain"
      -        ],
      -        "type": "string"
      -      },
      -      "id": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "kind": {
      -        "enum": [
      -          "video",
      -          "audio",
      -          "image",
      -          "overlay",
      -          "effect"
      -        ],
      -        "type": "string"
      -      },
      -      "linkGroupId": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "opacity": {
      -        "maximum": 1,
      -        "minimum": 0,
      -        "type": "number"
      -      },
      -      "position": {
      -        "additionalProperties": false,
      -        "description": "Clip CENTRE as a fraction of the frame: {x:0.5,y:0.5} is dead centre, 0 to 1 is inside the frame, and a little overshoot (down to -1, up to 2) is how an entrance starts off-canvas. NOT pixels: the renderer maps x to `left: x*100%`, so `x: 180` sits 180 frame-widths away and draws nothing.",
      -        "properties": {
      -          "x": {
      -            "maximum": 2,
      -            "minimum": -1,
      -            "type": "number"
      -          },
      -          "y": {
      -            "maximum": 2,
      -            "minimum": -1,
      -            "type": "number"
      -          }
      -        },
      -        "required": [
      -          "x",
      -          "y"
      -        ],
      -        "type": "object"
      -      },
      -      "region": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "h": {
      -            "exclusiveMinimum": 0,
      -            "maximum": 1,
      -            "type": "number"
      -          },
      -          "w": {
      -            "exclusiveMinimum": 0,
      -            "maximum": 1,
      -            "type": "number"
      -          },
      -          "x": {
      -            "maximum": 1,
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "y": {
      -            "maximum": 1,
      -            "minimum": 0,
      -            "type": "number"
      -          }
      -        },
      -        "required": [
      -          "x",
      -          "y",
      -          "w",
      -          "h"
      -        ],
      -        "type": "object"
      -      },
      -      "rotation": {
      -        "type": "number"
      -      },
      -      "scale": {
      -        "exclusiveMinimum": 0,
      -        "type": "number"
      -      },
      -      "source": {
      -        "anyOf": [
      -          {
      -            "additionalProperties": false,
      -            "properties": {
      -              "anchor": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "clipId": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "offsetMs": {
      -                    "type": "number"
      -                  }
      -                },
      -                "required": [
      -                  "clipId",
      -                  "offsetMs"
      -                ],
      -                "type": "object"
      -              },
      -              "audioRole": {
      -                "enum": [
      -                  "sfx",
      -                  "music",
      -                  "vo",
      -                  "ambience"
      -                ],
      -                "type": "string"
      -              },
      -              "duck": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "attackMs": {
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "duckDb": {
      -                    "maximum": 0,
      -                    "type": "number"
      -                  },
      -                  "releaseMs": {
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "windows": {
      -                    "items": {
      -                      "additionalProperties": false,
      -                      "properties": {
      -                        "endMs": {
      -                          "type": "number"
      -                        },
      -                        "startMs": {
      -                          "type": "number"
      -                        }
      -                      },
      -                      "required": [
      -                        "startMs",
      -                        "endMs"
      -                      ],
      -                      "type": "object"
      -                    },
      -                    "type": "array"
      -                  }
      -                },
      -                "required": [
      -                  "duckDb",
      -                  "attackMs",
      -                  "releaseMs"
      -                ],
      -                "type": "object"
      -              },
      -              "excludedRanges": {
      -                "items": {
      -                  "additionalProperties": false,
      -                  "properties": {
      -                    "end": {
      -                      "minimum": 0,
      -                      "type": "number"
      -                    },
      -                    "reason": {
      -                      "type": "string"
      -                    },
      -                    "start": {
      -                      "minimum": 0,
      -                      "type": "number"
      -                    }
      -                  },
      -                  "required": [
      -                    "start",
      -                    "end"
      -                  ],
      -                  "type": "object"
      -                },
      -                "type": "array"
      -              },
      -              "fadeInMs": {
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "fadeOutMs": {
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "kenBurns": {
      -                "enum": [
      -                  "in",
      -                  "out",
      -                  "pan-l",
      -                  "pan-r",
      -                  "none"
      -                ],
      -                "type": "string"
      -              },
      -              "kind": {
      -                "const": "media",
      -                "type": "string"
      -              },
      -              "loop": {
      -                "type": "boolean"
      -              },
      -              "mediaId": {
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "muted": {
      -                "type": "boolean"
      -              },
      -              "playbackRate": {
      -                "exclusiveMinimum": 0,
      -                "type": "number"
      -              },
      -              "reframe": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "segments": {
      -                    "items": {
      -                      "additionalProperties": false,
      -                      "properties": {
      -                        "bias": {
      -                          "additionalProperties": false,
      -                          "description": "Optional FINE framing nudge off the focus center, source-normalized in [−0.3, 0.3]. A small correction (headroom, rule-of-thirds), NOT a reframe — use `focus`/`zoom` for the actual shot. Omit (treated as 0) to sit dead-center on the focus.",
      -                          "properties": {
      -                            "x": {
      -                              "description": "Horizontal nudge, source-normalized (+ = right).",
      -                              "maximum": 0.3,
      -                              "minimum": -0.3,
      -                              "type": "number"
      -                            },
      -                            "y": {
      -                              "description": "Vertical nudge, source-normalized (+ = down).",
      -                              "maximum": 0.3,
      -                              "minimum": -0.3,
      -                              "type": "number"
      -                            }
      -                          },
      -                          "required": [
      -                            "x",
      -                            "y"
      -                          ],
      -                          "type": "object"
      -                        },
      -                        "ease": {
      -                          "additionalProperties": false,
      -                          "description": "Zoom/center ramp DURATIONS in SECONDS at this segment's edges — NOT a unitless 0–1 curve. ~0.3–0.6s reads as a snappy push; >1s reads sluggish. Keep `in` + `out` ≤ the segment's duration (endSec − startSec): the two edges share the span, so to ramp across the WHOLE segment set one edge to the full duration and the other to 0. Omit for an instant cut to this framing.",
      -                          "properties": {
      -                            "in": {
      -                              "description": "Ease-IN ramp DURATION in seconds at the segment START.",
      -                              "minimum": 0,
      -                              "type": "number"
      -                            },
      -                            "out": {
      -                              "description": "Ease-OUT ramp DURATION in seconds at the segment END.",
      -                              "minimum": 0,
      -                              "type": "number"
      -                            }
      -                          },
      -                          "required": [
      -                            "in",
      -                            "out"
      -                          ],
      -                          "type": "object"
      -                        },
      -                        "endSec": {
      -                          "description": "Segment END in seconds, clip-relative. The span (endSec − startSec) is this segment's duration — the window `ease` ramps over.",
      -                          "exclusiveMinimum": 0,
      -                          "type": "number"
      -                        },
      -                        "focus": {
      -                          "anyOf": [
      -                            {
      -                              "additionalProperties": false,
      -                              "properties": {
      -                                "mode": {
      -                                  "const": "frame-center",
      -                                  "type": "string"
      -                                }
      -                              },
      -                              "required": [
      -                                "mode"
      -                              ],
      -                              "type": "object"
      -                            },
      -                            {
      -                              "additionalProperties": false,
      -                              "properties": {
      -                                "mode": {
      -                                  "const": "point",
      -                                  "type": "string"
      -                                },
      -                                "x": {
      -                                  "maximum": 1,
      -                                  "minimum": 0,
      -                                  "type": "number"
      -                                },
      -                                "y": {
      -                                  "maximum": 1,
      -                                  "minimum": 0,
      -                                  "type": "number"
      -                                }
      -                              },
      -                              "required": [
      -                                "mode",
      -                                "x",
      -                                "y"
      -                              ],
      -                              "type": "object"
      -                            },
      -                            {
      -                              "additionalProperties": false,
      -                              "properties": {
      -                                "faceId": {
      -                                  "minLength": 1,
      -                                  "type": "string"
      -                                },
      -                                "mode": {
      -                                  "const": "face",
      -                                  "type": "string"
      -                                },
      -                                "shotScale": {
      -                                  "enum": [
      -                                    "close",
      -                                    "standard",
      -                                    "wide"
      -                                  ],
      -                                  "type": "string"
      -                                }
      -                              },
      -                              "required": [
      -                                "mode",
      -                                "faceId"
      -                              ],
      -                              "type": "object"
      -                            },
      -                            {
      -                              "additionalProperties": false,
      -                              "properties": {
      -                                "mode": {
      -                                  "const": "all-faces",
      -                                  "type": "string"
      -                                }
      -                              },
      -                              "required": [
      -                                "mode"
      -                              ],
      -                              "type": "object"
      -                            },
      -                            {
      -                              "additionalProperties": false,
      -                              "properties": {
      -                                "mode": {
      -                                  "const": "active-speaker",
      -                                  "type": "string"
      -                                }
      -                              },
      -                              "required": [
      -                                "mode"
      -                              ],
      -                              "type": "object"
      -                            }
      -                          ],
      -                          "description": "WHO/WHAT the camera tracks this segment (the reframe center), selected by `mode`: `frame-center` = no tracking, hold the geometric center (static/graphic footage, or a pure zoom); `point` = lock to a fixed source-normalized {x,y} (a non-moving on-screen element); `face` = track a detected face by `faceId` (from get_media_context), with optional `shotScale` close|standard|wide for tightness; `all-faces` = frame the bounding box of every detected face (group/ensemble shots); `active-speaker` = follow whoever is speaking (diarized talking-head / podcast). Pick by what the beat is about; pair with `zoom` for how tight."
      -                        },
      -                        "intent": {
      -                          "description": "Optional editorial LABEL for diff/log readability (e.g. 'speaker-tight', 'wide-context'). Cosmetic — NOT honored by the derive math and excluded from the variant cache key.",
      -                          "type": "string"
      -                        },
      -                        "startSec": {
      -                          "description": "Segment START in seconds, clip-relative. Segments tile the clip's duration in order.",
      -                          "minimum": 0,
      -                          "type": "number"
      -                        },
      -                        "zoom": {
      -                          "description": "How TIGHT the framing is — the fraction of the source the output viewport shows. <1 punches IN (a smaller source fraction, magnified to fill the frame); 1 = the full frame (no crop). ~0.6–0.8 is a moderate push-in, ~0.5 a tight close-up, 0.1 the maximum zoom. There is NO zoom-OUT past the full frame (max 1). Omit for the full frame. MUTUALLY EXCLUSIVE with `focus.shotScale` — a face-tracked shot is sized EITHER by the editorial scale (shotScale, which the bake calibrates to the detected face) OR by an explicit zoom, never both. A segment carrying both is REJECTED: shotScale wins at bake time and the zoom would be silently discarded.",
      -                          "maximum": 1,
      -                          "minimum": 0.1,
      -                          "type": "number"
      -                        }
      -                      },
      -                      "required": [
      -                        "startSec",
      -                        "endSec",
      -                        "focus"
      -                      ],
      -                      "type": "object"
      -                    },
      -                    "minItems": 1,
      -                    "type": "array"
      -                  }
      -                },
      -                "required": [
      -                  "segments"
      -                ],
      -                "type": "object"
      -              },
      -              "sync": {
      -                "enum": [
      -                  "video",
      -                  "independent"
      -                ],
      -                "type": "string"
      -              },
      -              "trim": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "end": {
      -                    "description": "Source trim end (seconds).",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "start": {
      -                    "description": "Source trim start (seconds).",
      -                    "minimum": 0,
      -                    "type": "number"
      -                  }
      -                },
      -                "required": [
      -                  "start",
      -                  "end"
      -                ],
      -                "type": "object"
      -              },
      -              "volume": {
      -                "maximum": 4,
      -                "minimum": 0,
      -                "type": "number"
      -              },
      -              "volumeDb": {
      -                "type": "number"
      -              }
      -            },
      -            "required": [
      -              "kind",
      -              "mediaId"
      -            ],
      -            "type": "object"
      -          },
      -          {
      -            "additionalProperties": false,
      -            "properties": {
      -              "componentId": {
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "execution": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "assets": {
      -                    "additionalProperties": {
      -                      "minLength": 1,
      -                      "type": "string"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "componentId": {
      -                    "maxLength": 256,
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "mediaBindings": {
      -                    "additionalProperties": {
      -                      "items": {
      -                        "maxLength": 128,
      -                        "minLength": 1,
      -                        "type": "string"
      -                      },
      -                      "type": "array"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "params": {
      -                    "additionalProperties": {
      -                      "$ref": "#/$defs/__schema0"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "seed": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "sourceVersionId": {
      -                    "pattern": "^[a-f0-9]{64}$",
      -                    "type": "string"
      -                  },
      -                  "version": {
      -                    "const": 3,
      -                    "type": "number"
      -                  }
      -                },
      -                "required": [
      -                  "version",
      -                  "componentId",
      -                  "sourceVersionId",
      -                  "params",
      -                  "seed"
      -                ],
      -                "type": "object"
      -              },
      -              "kind": {
      -                "const": "component",
      -                "type": "string"
      -              },
      -              "placement": {
      -                "anyOf": [
      -                  {
      -                    "additionalProperties": false,
      -                    "properties": {
      -                      "kind": {
      -                        "const": "clip",
      -                        "type": "string"
      -                      },
      -                      "version": {
      -                        "const": 3,
      -                        "type": "number"
      -                      }
      -                    },
      -                    "required": [
      -                      "version",
      -                      "kind"
      -                    ],
      -                    "type": "object"
      -                  },
      -                  {
      -                    "additionalProperties": false,
      -                    "properties": {
      -                      "kind": {
      -                        "const": "content-slots",
      -                        "type": "string"
      -                      },
      -                      "slots": {
      -                        "additionalProperties": {
      -                          "additionalProperties": false,
      -                          "properties": {
      -                            "ownership": {
      -                              "enum": [
      -                                "reference",
      -                                "exclusive"
      -                              ],
      -                              "type": "string"
      -                            },
      -                            "targetClipIds": {
      -                              "items": {
      -                                "maxLength": 256,
      -                                "minLength": 1,
      -                                "type": "string"
      -                              },
      -                              "type": "array"
      -                            }
      -                          },
      -                          "required": [
      -                            "targetClipIds",
      -                            "ownership"
      -                          ],
      -                          "type": "object"
      -                        },
      -                        "propertyNames": {
      -                          "type": "string"
      -                        },
      -                        "type": "object"
      -                      },
      -                      "version": {
      -                        "const": 3,
      -                        "type": "number"
      -                      }
      -                    },
      -                    "required": [
      -                      "version",
      -                      "kind",
      -                      "slots"
      -                    ],
      -                    "type": "object"
      -                  }
      -                ]
      -              },
      -              "props": {
      -                "additionalProperties": {},
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "zPlane": {
      -                "enum": [
      -                  "front",
      -                  "behind-subject"
      -                ],
      -                "type": "string"
      -              }
      -            },
      -            "required": [
      -              "kind",
      -              "componentId",
      -              "props",
      -              "execution",
      -              "placement"
      -            ],
      -            "type": "object"
      -          },
      -          {
      -            "additionalProperties": false,
      -            "properties": {
      -              "anchor": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "space": {
      -                    "const": "scene",
      -                    "type": "string"
      -                  },
      -                  "x": {
      -                    "maximum": 1,
      -                    "minimum": 0,
      -                    "type": "number"
      -                  },
      -                  "y": {
      -                    "maximum": 1,
      -                    "minimum": 0,
      -                    "type": "number"
      -                  }
      -                },
      -                "required": [
      -                  "space",
      -                  "x",
      -                  "y"
      -                ],
      -                "type": "object"
      -              },
      -              "kind": {
      -                "const": "overlay",
      -                "type": "string"
      -              },
      -              "parallax": {
      -                "maximum": 0.3,
      -                "minimum": -0.3,
      -                "type": "number"
      -              },
      -              "params": {
      -                "additionalProperties": {},
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "primitiveId": {
      -                "minLength": 1,
      -                "pattern": "^(?!custom$)",
      -                "type": "string"
      -              },
      -              "zPlane": {
      -                "enum": [
      -                  "front",
      -                  "behind-subject"
      -                ],
      -                "type": "string"
      -              }
      -            },
      -            "required": [
      -              "kind",
      -              "primitiveId",
      -              "params"
      -            ],
      -            "type": "object"
      -          },
      -          {
      -            "additionalProperties": false,
      -            "properties": {
      -              "component": {
      -                "additionalProperties": false,
      -                "properties": {
      -                  "assets": {
      -                    "additionalProperties": {
      -                      "minLength": 1,
      -                      "type": "string"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "componentId": {
      -                    "maxLength": 256,
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "mediaBindings": {
      -                    "additionalProperties": {
      -                      "items": {
      -                        "maxLength": 128,
      -                        "minLength": 1,
      -                        "type": "string"
      -                      },
      -                      "type": "array"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "params": {
      -                    "additionalProperties": {
      -                      "$ref": "#/$defs/__schema0"
      -                    },
      -                    "propertyNames": {
      -                      "type": "string"
      -                    },
      -                    "type": "object"
      -                  },
      -                  "seed": {
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "sourceVersionId": {
      -                    "pattern": "^[a-f0-9]{64}$",
      -                    "type": "string"
      -                  },
      -                  "version": {
      -                    "const": 3,
      -                    "type": "number"
      -                  }
      -                },
      -                "required": [
      -                  "version",
      -                  "componentId",
      -                  "sourceVersionId",
      -                  "params",
      -                  "seed"
      -                ],
      -                "type": "object"
      -              },
      -              "kind": {
      -                "const": "effect",
      -                "type": "string"
      -              },
      -              "params": {
      -                "additionalProperties": {},
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "primitiveId": {
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "targetTrackIds": {
      -                "items": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "minItems": 1,
      -                "type": "array"
      -              },
      -              "wrapperOrder": {
      -                "maximum": 9007199254740991,
      -                "minimum": 0,
      -                "type": "integer"
      -              }
      -            },
      -            "required": [
      -              "kind"
      -            ],
      -            "type": "object"
      -          },
      -          {
      -            "additionalProperties": false,
      -            "properties": {
      -              "html": {
      -                "description": "Your card's HTML — rendered VERBATIM as the graphic (shell motion via applyMotionPreset in a FOLLOWING call). CANVAS CONTRACT: the card renders in a viewport equal to the composition format's pixel frame (1080×1920 at 9:16 fhd); the root is NOT auto-pinned — declare explicit width/height matching the frame (box-sizing:border-box) and anchor content with flex/grid; position:absolute;inset:0 on the root does NOT fill the frame; for edge-to-edge backgrounds add an inner absolutely-positioned layer with generous negative inset. Overlay compositing applies a ~92% safe-area inset — keep critical copy away from the extreme edges. FONTS: name a family from GET /v1/fonts (list_render_fonts) — the renderer loads those faces for the card and waits for them, so `font-family: Inter` draws Inter. `@import` and remote font files are REFUSED: the card renders with no network. A family that is not on that list has no bytes behind it and the browser falls back, so end any stack with a generic (`Inter, sans-serif`) rather than relying on a system face being present.",
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "kind": {
      -                "const": "card",
      -                "type": "string"
      -              },
      -              "tokens": {
      -                "additionalProperties": {
      -                  "type": "string"
      -                },
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "zPlane": {
      -                "const": "front",
      -                "type": "string"
      -              }
      -            },
      -            "required": [
      -              "kind",
      -              "html"
      -            ],
      -            "type": "object"
      -          }
      -        ]
      -      },
      -      "startTime": {
      -        "description": "Timeline start (seconds).",
      -        "minimum": 0,
      -        "type": "number"
      -      },
      -      "transitionIn": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "component": {
      -            "additionalProperties": false,
      -            "properties": {
      -              "assets": {
      -                "additionalProperties": {
      -                  "minLength": 1,
      -                  "type": "string"
      -                },
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "componentId": {
      -                "maxLength": 256,
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "mediaBindings": {
      -                "additionalProperties": {
      -                  "items": {
      -                    "maxLength": 128,
      -                    "minLength": 1,
      -                    "type": "string"
      -                  },
      -                  "type": "array"
      -                },
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "params": {
      -                "additionalProperties": {
      -                  "$ref": "#/$defs/__schema0"
      -                },
      -                "propertyNames": {
      -                  "type": "string"
      -                },
      -                "type": "object"
      -              },
      -              "seed": {
      -                "minLength": 1,
      -                "type": "string"
      -              },
      -              "sourceVersionId": {
      -                "pattern": "^[a-f0-9]{64}$",
      -                "type": "string"
      -              },
      -              "version": {
      -                "const": 3,
      -                "type": "number"
      -              }
      -            },
      -            "required": [
      -              "version",
      -              "componentId",
      -              "sourceVersionId",
      -              "params",
      -              "seed"
      -            ],
      -            "type": "object"
      -          },
      -          "duration": {
      -            "exclusiveMinimum": 0,
      -            "type": "number"
      -          },
      -          "fromClipId": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "handlePolicy": {
      -            "const": "outgoing-overrun-at-cut-v1",
      -            "type": "string"
      -          },
      -          "id": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "toClipId": {
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "type": {
      -            "minLength": 1,
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "type",
      -          "duration"
      -        ],
      -        "type": "object"
      -      }
      -    },
      -    "required": [
      -      "id",
      -      "startTime",
      -      "duration",
      -      "source"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "duration": {
      -        "description": "Gap duration (seconds).",
      -        "exclusiveMinimum": 0,
      -        "type": "number"
      -      },
      -      "id": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "startTime": {
      -        "description": "Timeline start (seconds).",
      -        "minimum": 0,
      -        "type": "number"
      -      }
      -    },
      -    "required": [
      -      "id",
      -      "startTime",
      -      "duration"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "automation": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "lanes": {
      +            "items": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "points": {
      +                  "items": {
      +                    "additionalProperties": false,
      +                    "properties": {
      +                      "t": {
      +                        "type": "number"
      +                      },
      +                      "v": {
      +                        "type": "number"
      +                      }
      +                    },
      +                    "required": [
      +                      "t",
      +                      "v"
      +                    ],
      +                    "type": "object"
      +                  },
      +                  "minItems": 2,
      +                  "type": "array"
      +                },
      +                "target": {
      +                  "const": "volume",
      +                  "type": "string"
      +                }
      +              },
      +              "required": [
      +                "target",
      +                "points"
      +              ],
      +              "type": "object"
      +            },
      +            "type": "array"
      +          },
      +          "version": {
      +            "const": 1,
      +            "type": "number"
      +          }
      +        },
      +        "required": [
      +          "version",
      +          "lanes"
      +        ],
      +        "type": "object"
      +      },
      +      "captionVisibility": {
      +        "description": "Video media clip only. Hide native captions while this clip is topmost and covers the lower picture, or when an opaque, effect-free clip has an explicitly full-frame region, even with fit:contain. Caption words and timings remain stored and resume when another visible clip takes over.",
      +        "enum": [
      +          "visible",
      +          "hidden"
      +        ],
      +        "type": "string"
      +      },
      +      "duration": {
      +        "exclusiveMinimum": 0,
      +        "type": "number"
      +      },
      +      "effects": {
      +        "items": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "component": {
      +              "oneOf": [
      +                {
      +                  "additionalProperties": false,
      +                  "properties": {
      +                    "assets": {
      +                      "additionalProperties": {
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "maxLength": 256,
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "componentId": {
      +                      "maxLength": 256,
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "mediaBindings": {
      +                      "additionalProperties": {
      +                        "items": {
      +                          "maxLength": 128,
      +                          "minLength": 1,
      +                          "type": "string"
      +                        },
      +                        "type": "array"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "maxLength": 128,
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "params": {
      +                      "additionalProperties": {
      +                        "$ref": "#/$defs/__schema0"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "seed": {
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "sourceVersionId": {
      +                      "pattern": "^[a-f0-9]{64}$",
      +                      "type": "string"
      +                    },
      +                    "version": {
      +                      "const": 3,
      +                      "type": "number"
      +                    }
      +                  },
      +                  "required": [
      +                    "version",
      +                    "componentId",
      +                    "sourceVersionId",
      +                    "params",
      +                    "seed"
      +                  ],
      +                  "type": "object"
      +                },
      +                {
      +                  "additionalProperties": false,
      +                  "properties": {
      +                    "assets": {
      +                      "additionalProperties": {
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "maxLength": 256,
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "componentId": {
      +                      "maxLength": 256,
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "mediaBindings": {
      +                      "additionalProperties": {
      +                        "items": {
      +                          "maxLength": 128,
      +                          "minLength": 1,
      +                          "type": "string"
      +                        },
      +                        "type": "array"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "maxLength": 128,
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "params": {
      +                      "additionalProperties": {
      +                        "$ref": "#/$defs/__schema0"
      +                      },
      +                      "properties": {},
      +                      "propertyNames": {
      +                        "type": "string"
      +                      },
      +                      "type": "object"
      +                    },
      +                    "seed": {
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "sourceVersionId": {
      +                      "pattern": "^[a-f0-9]{64}$",
      +                      "type": "string"
      +                    },
      +                    "version": {
      +                      "const": 4,
      +                      "type": "number"
      +                    }
      +                  },
      +                  "required": [
      +                    "version",
      +                    "componentId",
      +                    "sourceVersionId",
      +                    "params",
      +                    "seed"
      +                  ],
      +                  "type": "object"
      +                }
      +              ]
      +            },
      +            "id": {
      +              "minLength": 1,
      +              "type": "string"
      +            },
      +            "params": {
      +              "additionalProperties": {},
      +              "properties": {},
      +              "propertyNames": {
      +                "type": "string"
      +              },
      +              "type": "object"
      +            },
      +            "primitiveId": {
      +              "minLength": 1,
      +              "type": "string"
      +            },
      +            "window": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "duration": {
      +                  "exclusiveMinimum": 0,
      +                  "type": "number"
      +                },
      +                "startTime": {
      +                  "minimum": 0,
      +                  "type": "number"
      +                }
      +              },
      +              "required": [
      +                "startTime",
      +                "duration"
      +              ],
      +              "type": "object"
      +            }
      +          },
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "fit": {
      +        "enum": [
      +          "cover",
      +          "contain"
      +        ],
      +        "type": "string"
      +      },
      +      "id": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "kind": {
      +        "enum": [
      +          "video",
      +          "audio",
      +          "image",
      +          "overlay",
      +          "effect"
      +        ],
      +        "type": "string"
      +      },
      +      "legacyKeyframes": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "channels": {
      +            "items": {
      +              "type": "string"
      +            },
      +            "type": "array"
      +          },
      +          "needsUpgrade": {
      +            "const": true,
      +            "type": "boolean"
      +          },
      +          "record": {}
      +        },
      +        "required": [
      +          "needsUpgrade",
      +          "channels",
      +          "record"
      +        ],
      +        "type": "object"
      +      },
      +      "linkGroupId": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "opacity": {
      +        "maximum": 1,
      +        "minimum": 0,
      +        "type": "number"
      +      },
      +      "position": {
      +        "additionalProperties": {},
      +        "description": "Clip CENTRE as a fraction of the frame: {x:0.5,y:0.5} is dead centre, 0 to 1 is inside the frame, and a little overshoot (down to -1, up to 2) is how an entrance starts off-canvas. NOT pixels: the renderer maps x to `left: x*100%`, so `x: 180` sits 180 frame-widths away and draws nothing.",
      +        "properties": {
      +          "x": {
      +            "maximum": 2,
      +            "minimum": -1,
      +            "type": "number"
      +          },
      +          "y": {
      +            "maximum": 2,
      +            "minimum": -1,
      +            "type": "number"
      +          }
      +        },
      +        "required": [
      +          "x",
      +          "y"
      +        ],
      +        "type": "object"
      +      },
      +      "region": {
      +        "additionalProperties": {},
      +        "properties": {
      +          "h": {
      +            "exclusiveMinimum": 0,
      +            "maximum": 1,
      +            "type": "number"
      +          },
      +          "w": {
      +            "exclusiveMinimum": 0,
      +            "maximum": 1,
      +            "type": "number"
      +          },
      +          "x": {
      +            "maximum": 1,
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "y": {
      +            "maximum": 1,
      +            "minimum": 0,
      +            "type": "number"
      +          }
      +        },
      +        "required": [
      +          "x",
      +          "y",
      +          "w",
      +          "h"
      +        ],
      +        "type": "object"
      +      },
      +      "rotation": {
      +        "type": "number"
      +      },
      +      "scale": {
      +        "exclusiveMinimum": 0,
      +        "type": "number"
      +      },
      +      "source": {
      +        "oneOf": [
      +          {
      +            "additionalProperties": {},
      +            "properties": {
      +              "anchor": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "clipId": {
      +                    "minLength": 1,
      +                    "type": "string"
      +                  },
      +                  "offsetMs": {
      +                    "type": "number"
      +                  }
      +                },
      +                "required": [
      +                  "clipId",
      +                  "offsetMs"
      +                ],
      +                "type": "object"
      +              },
      +              "audioRole": {
      +                "enum": [
      +                  "sfx",
      +                  "music",
      +                  "vo",
      +                  "ambience"
      +                ],
      +                "type": "string"
      +              },
      +              "duck": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "attackMs": {
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "duckDb": {
      +                    "maximum": 0,
      +                    "type": "number"
      +                  },
      +                  "releaseMs": {
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "windows": {
      +                    "items": {
      +                      "additionalProperties": {},
      +                      "properties": {
      +                        "endMs": {
      +                          "type": "number"
      +                        },
      +                        "startMs": {
      +                          "type": "number"
      +                        }
      +                      },
      +                      "required": [
      +                        "startMs",
      +                        "endMs"
      +                      ],
      +                      "type": "object"
      +                    },
      +                    "type": "array"
      +                  }
      +                },
      +                "required": [
      +                  "duckDb",
      +                  "attackMs",
      +                  "releaseMs"
      +                ],
      +                "type": "object"
      +              },
      +              "excludedRanges": {
      +                "items": {
      +                  "additionalProperties": {},
      +                  "properties": {
      +                    "end": {
      +                      "minimum": 0,
      +                      "type": "number"
      +                    },
      +                    "reason": {
      +                      "type": "string"
      +                    },
      +                    "start": {
      +                      "minimum": 0,
      +                      "type": "number"
      +                    }
      +                  },
      +                  "required": [
      +                    "start",
      +                    "end"
      +                  ],
      +                  "type": "object"
      +                },
      +                "type": "array"
      +              },
      +              "fadeInMs": {
      +                "minimum": 0,
      +                "type": "number"
      +              },
      +              "fadeOutMs": {
      +                "minimum": 0,
      +                "type": "number"
      +              },
      +              "kenBurns": {
      +                "enum": [
      +                  "in",
      +                  "out",
      +                  "pan-l",
      +                  "pan-r",
      +                  "none"
      +                ],
      +                "type": "string"
      +              },
      +              "kind": {
      +                "const": "media",
      +                "type": "string"
      +              },
      +              "loop": {
      +                "type": "boolean"
      +              },
      +              "mediaId": {
      +                "type": "string"
      +              },
      +              "muted": {
      +                "type": "boolean"
      +              },
      +              "playbackRate": {
      +                "exclusiveMinimum": 0,
      +                "type": "number"
      +              },
      +              "reframe": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "segments": {
      +                    "items": {
      +                      "additionalProperties": {},
      +                      "properties": {
      +                        "bias": {
      +                          "additionalProperties": {},
      +                          "description": "Optional FINE framing nudge off the focus center, source-normalized in [−0.3, 0.3]. A small correction (headroom, rule-of-thirds), NOT a reframe — use `focus`/`zoom` for the actual shot. Omit (treated as 0) to sit dead-center on the focus.",
      +                          "properties": {
      +                            "x": {
      +                              "description": "Horizontal nudge, source-normalized (+ = right).",
      +                              "maximum": 0.3,
      +                              "minimum": -0.3,
      +                              "type": "number"
      +                            },
      +                            "y": {
      +                              "description": "Vertical nudge, source-normalized (+ = down).",
      +                              "maximum": 0.3,
      +                              "minimum": -0.3,
      +                              "type": "number"
      +                            }
      +                          },
      +                          "required": [
      +                            "x",
      +                            "y"
      +                          ],
      +                          "type": "object"
      +                        },
      +                        "ease": {
      +                          "additionalProperties": {},
      +                          "description": "Zoom/center ramp DURATIONS in SECONDS at this segment's edges — NOT a unitless 0–1 curve. ~0.3–0.6s reads as a snappy push; >1s reads sluggish. Keep `in` + `out` ≤ the segment's duration (endSec − startSec): the two edges share the span, so to ramp across the WHOLE segment set one edge to the full duration and the other to 0. Omit for an instant cut to this framing.",
      +                          "properties": {
      +                            "in": {
      +                              "description": "Ease-IN ramp DURATION in seconds at the segment START.",
      +                              "minimum": 0,
      +                              "type": "number"
      +                            },
      +                            "out": {
      +                              "description": "Ease-OUT ramp DURATION in seconds at the segment END.",
      +                              "minimum": 0,
      +                              "type": "number"
      +                            }
      +                          },
      +                          "required": [
      +                            "in",
      +                            "out"
      +                          ],
      +                          "type": "object"
      +                        },
      +                        "endSec": {
      +                          "description": "Segment END in seconds, clip-relative. The span (endSec − startSec) is this segment's duration — the window `ease` ramps over.",
      +                          "exclusiveMinimum": 0,
      +                          "type": "number"
      +                        },
      +                        "focus": {
      +                          "description": "WHO/WHAT the camera tracks this segment (the reframe center), selected by `mode`: `frame-center` = no tracking, hold the geometric center (static/graphic footage, or a pure zoom); `point` = lock to a fixed source-normalized {x,y} (a non-moving on-screen element); `face` = track a detected face by `faceId` (from get_media_context), with optional `shotScale` close|standard|wide for tightness; `all-faces` = frame the bounding box of every detected face (group/ensemble shots); `active-speaker` = follow whoever is speaking (diarized talking-head / podcast). Pick by what the beat is about; pair with `zoom` for how tight.",
      +                          "oneOf": [
      +                            {
      +                              "additionalProperties": {},
      +                              "properties": {
      +                                "mode": {
      +                                  "const": "frame-center",
      +                                  "type": "string"
      +                                }
      +                              },
      +                              "required": [
      +                                "mode"
      +                              ],
      +                              "type": "object"
      +                            },
      +                            {
      +                              "additionalProperties": {},
      +                              "properties": {
      +                                "mode": {
      +                                  "const": "point",
      +                                  "type": "string"
      +                                },
      +                                "x": {
      +                                  "maximum": 1,
      +                                  "minimum": 0,
      +                                  "type": "number"
      +                                },
      +                                "y": {
      +                                  "maximum": 1,
      +                                  "minimum": 0,
      +                                  "type": "number"
      +                                }
      +                              },
      +                              "required": [
      +                                "mode",
      +                                "x",
      +                                "y"
      +                              ],
      +                              "type": "object"
      +                            },
      +                            {
      +                              "additionalProperties": {},
      +                              "properties": {
      +                                "faceId": {
      +                                  "minLength": 1,
      +                                  "type": "string"
      +                                },
      +                                "mode": {
      +                                  "const": "face",
      +                                  "type": "string"
      +                                },
      +                                "shotScale": {
      +                                  "enum": [
      +                                    "close",
      +                                    "standard",
      +                                    "wide"
      +                                  ],
      +                                  "type": "string"
      +                                }
      +                              },
      +                              "required": [
      +                                "mode",
      +                                "faceId"
      +                              ],
      +                              "type": "object"
      +                            },
      +                            {
      +                              "additionalProperties": {},
      +                              "properties": {
      +                                "mode": {
      +                                  "const": "all-faces",
      +                                  "type": "string"
      +                                }
      +                              },
      +                              "required": [
      +                                "mode"
      +                              ],
      +                              "type": "object"
      +                            },
      +                            {
      +                              "additionalProperties": {},
      +                              "properties": {
      +                                "mode": {
      +                                  "const": "active-speaker",
      +                                  "type": "string"
      +                                }
      +                              },
      +                              "required": [
      +                                "mode"
      +                              ],
      +                              "type": "object"
      +                            }
      +                          ]
      +                        },
      +                        "intent": {
      +                          "description": "Optional editorial LABEL for diff/log readability (e.g. 'speaker-tight', 'wide-context'). Cosmetic — NOT honored by the derive math and excluded from the variant cache key.",
      +                          "type": "string"
      +                        },
      +                        "startSec": {
      +                          "description": "Segment START in seconds, clip-relative. Segments tile the clip's duration in order.",
      +                          "minimum": 0,
      +                          "type": "number"
      +                        },
      +                        "zoom": {
      +                          "description": "How TIGHT the framing is — the fraction of the source the output viewport shows. <1 punches IN (a smaller source fraction, magnified to fill the frame); 1 = the full frame (no crop). ~0.6–0.8 is a moderate push-in, ~0.5 a tight close-up, 0.1 the maximum zoom. There is NO zoom-OUT past the full frame (max 1). Omit for the full frame. MUTUALLY EXCLUSIVE with `focus.shotScale`: a face-tracked shot is sized EITHER by the editorial scale (shotScale, calibrated to the detected face) OR by an explicit zoom — never both.",
      +                          "maximum": 1,
      +                          "minimum": 0.1,
      +                          "type": "number"
      +                        }
      +                      },
      +                      "required": [
      +                        "startSec",
      +                        "endSec",
      +                        "focus"
      +                      ],
      +                      "type": "object"
      +                    },
      +                    "minItems": 1,
      +                    "type": "array"
      +                  }
      +                },
      +                "required": [
      +                  "segments"
      +                ],
      +                "type": "object"
      +              },
      +              "sync": {
      +                "enum": [
      +                  "video",
      +                  "independent"
      +                ],
      +                "type": "string"
      +              },
      +              "trim": {
      +                "additionalProperties": {},
      +                "properties": {
      +                  "end": {
      +                    "minimum": 0,
      +                    "type": "number"
      +                  },
      +                  "start": {
      +                    "minimum": 0,
      +                    "type": "number"
      +                  }
      +                },
      +                "required": [
      +                  "start",
      +                  "end"
      +                ],
      +                "type": "object"
      +              },
      +              "volume": {
      +                "maximum": 4,
      +                "minimum": 0,
      +                "type": "number"
      +              },
      +              "volumeDb": {
      +                "type": "number"
      +              }
      +            },
      +            "required": [
      +              "kind",
      +              "mediaId"
      +            ],
      +            "type": "object"
      +          },
      +          {
      +            "additionalProperties": false,
      +            "properties": {
      +              "componentId": {
      +                "minLength": 1,
      +                "type": "string"
      +              },
      +              "execution": {
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      +                    "additionalProperties": false,
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      +                      "sourceVersionId": {
      +                        "pattern": "^[a-f0-9]{64}$",
      +                        "type": "string"
      +                      },
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      +                        "const": 3,
      +                        "type": "number"
      +                      }
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      +                    "additionalProperties": false,
      +                    "properties": {
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      +                      "sourceVersionId": {
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      +                    "properties": {
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      +                      },
      +                      "slots": {
      +                        "additionalProperties": {
      +                          "additionalProperties": false,
      +                          "properties": {
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      +                              "enum": [
      +                                "reference",
      +                                "exclusive"
      +                              ],
      +                              "type": "string"
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      +                            "targetClipIds": {
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      +                                "maxLength": 256,
      +                                "minLength": 1,
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      +                              "type": "array"
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      +                          "required": [
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      +                          ],
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      +                        "type": "number"
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      +              "zPlane": {
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      +                  "front",
      +                  "behind-subject"
      +                ],
      +                "type": "string"
      +              }
      +            },
      +            "required": [
      +              "kind",
      +              "componentId",
      +              "props"
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      +            "type": "object"
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      +            "additionalProperties": {},
      +            "properties": {
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      +                "additionalProperties": {},
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      +                    "type": "object"
      +                  },
      +                  "seed": {
      +                    "minLength": 1,
      +                    "type": "string"
      +                  },
      +                  "sourceVersionId": {
      +                    "pattern": "^[a-f0-9]{64}$",
      +                    "type": "string"
      +                  },
      +                  "version": {
      +                    "const": 3,
      +                    "type": "number"
      +                  }
      +                },
      +                "required": [
      +                  "version",
      +                  "componentId",
      +                  "sourceVersionId",
      +                  "params",
      +                  "seed"
      +                ],
      +                "type": "object"
      +              },
      +              {
      +                "additionalProperties": false,
      +                "properties": {
      +                  "assets": {
      +                    "additionalProperties": {
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "properties": {},
      +                    "propertyNames": {
      +                      "maxLength": 256,
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "type": "object"
      +                  },
      +                  "componentId": {
      +                    "maxLength": 256,
      +                    "minLength": 1,
      +                    "type": "string"
      +                  },
      +                  "mediaBindings": {
      +                    "additionalProperties": {
      +                      "items": {
      +                        "maxLength": 128,
      +                        "minLength": 1,
      +                        "type": "string"
      +                      },
      +                      "type": "array"
      +                    },
      +                    "properties": {},
      +                    "propertyNames": {
      +                      "maxLength": 128,
      +                      "minLength": 1,
      +                      "type": "string"
      +                    },
      +                    "type": "object"
      +                  },
      +                  "params": {
      +                    "additionalProperties": {
      +                      "$ref": "#/$defs/__schema0"
      +                    },
      +                    "properties": {},
      +                    "propertyNames": {
      +                      "type": "string"
      +                    },
      +                    "type": "object"
      +                  },
      +                  "seed": {
      +                    "minLength": 1,
      +                    "type": "string"
      +                  },
      +                  "sourceVersionId": {
      +                    "pattern": "^[a-f0-9]{64}$",
      +                    "type": "string"
      +                  },
      +                  "version": {
      +                    "const": 4,
      +                    "type": "number"
      +                  }
      +                },
      +                "required": [
      +                  "version",
      +                  "componentId",
      +                  "sourceVersionId",
      +                  "params",
      +                  "seed"
      +                ],
      +                "type": "object"
      +              }
      +            ]
      +          },
      +          "duration": {
      +            "exclusiveMinimum": 0,
      +            "type": "number"
      +          },
      +          "fromClipId": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "handlePolicy": {
      +            "const": "outgoing-overrun-at-cut-v1",
      +            "type": "string"
      +          },
      +          "id": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "toClipId": {
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "type": {
      +            "minLength": 1,
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "type",
      +          "duration"
      +        ],
      +        "type": "object"
      +      },
      +      "tweens": {
      +        "items": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "duration": {
      +              "exclusiveMinimum": 0,
      +              "type": "number"
      +            },
      +            "id": {
      +              "minLength": 1,
      +              "type": "string"
      +            },
      +            "keyframes": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "easeEach": {
      +                  "const": "none",
      +                  "type": "string"
      +                },
      +                "format": {
      +                  "const": "percentage",
      +                  "type": "string"
      +                },
      +                "keyframes": {
      +                  "items": {
      +                    "additionalProperties": false,
      +                    "properties": {
      +                      "ease": {
      +                        "type": "string"
      +                      },
      +                      "percentage": {
      +                        "type": "number"
      +                      },
      +                      "properties": {
      +                        "additionalProperties": {
      +                          "type": "number"
      +                        },
      +                        "properties": {},
      +                        "propertyNames": {
      +                          "type": "string"
      +                        },
      +                        "type": "object"
      +                      }
      +                    },
      +                    "required": [
      +                      "percentage",
      +                      "properties"
      +                    ],
      +                    "type": "object"
      +                  },
      +                  "minItems": 2,
      +                  "type": "array"
      +                }
      +              },
      +              "required": [
      +                "format",
      +                "easeEach",
      +                "keyframes"
      +              ],
      +              "type": "object"
      +            },
      +            "position": {
      +              "type": "number"
      +            },
      +            "propertyGroup": {
      +              "enum": [
      +                "visual",
      +                "scale",
      +                "rotation",
      +                "position"
      +              ],
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "id",
      +            "propertyGroup",
      +            "position",
      +            "duration",
      +            "keyframes"
      +          ],
      +          "type": "object"
      +        },
      +        "type": "array"
      +      }
      +    },
      +    "required": [
      +      "id",
      +      "startTime",
      +      "duration",
      +      "source"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "duration": {
      +        "exclusiveMinimum": 0,
      +        "type": "number"
      +      },
      +      "id": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "startTime": {
      +        "minimum": 0,
      +        "type": "number"
      +      }
      +    },
      +    "required": [
      +      "id",
      +      "startTime",
      +      "duration"
      +    ],
      +    "type": "object"
      +  }
      +]
  2. First observed

TDQS

A4.4/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Goes well beyond the annotations: it specifies that the response is ALWAYS a single 200 shape { valid, errors, quote } for both malformed wire shapes and deep-invariant failures, documents the errors[] envelope fields { code, stage, category, retryable, message, fix }, and names the exact DB-bound checks that cannot run here plus the component_source_unavailable failure mode. With annotations only covering safety hints, this is exceptional disclosure.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with purpose and the non-persistence guarantee, then layers return shape, then limitations. Every clause carries real information, but the dense parenthetical stacking makes it a heavy read; slightly trimmed it would be a 5.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a high-complexity validation tool with an output schema, it covers what is checked, what is returned, how to branch on the result, and the exact classes of failure it CANNOT catch. An agent has everything needed to call it and interpret the result correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Only one parameter, `body`, and the description adds little beyond 'Pass the Composition as `body`' — no per-field semantics. Schema description coverage is 0% at the property level, so the description neither compensates nor misleads; the enormous self-documenting nested schema carries the structural burden. Minimum-viable 3.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Opens with a specific verb+resource+scope: 'Dry-run a full Composition object against the SAME pure, DB-free authoring guards saveComposition enforces, WITHOUT persisting it (no project needed).' This distinguishes it from saveComposition and from apply/new_composition siblings, and an agent can tell what it does without opening the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Strong context: fixes should happen 'before composing/rendering' and the quote must be relayed 'BEFORE create_render', and it warns to branch on `valid` not HTTP status. It clearly states the boundary condition (valid:true is save-safe EXCEPT for three DB-bound checks). It stops short of naming an explicit alternative tool the way the calibration HIGH example does, so a 4 rather than 5.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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