{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "openmontage/artifacts/script",
  "title": "Production Script",
  "description": "Timestamped script produced by the Script Writer agent.",
  "type": "object",
  "required": ["version", "title", "total_duration_seconds", "sections"],
  "properties": {
    "version": { "type": "string", "const": "1.0" },
    "title": { "type": "string" },
    "total_duration_seconds": { "type": "number", "minimum": 1 },
    "voice_performance": {
      "type": "object",
      "description": "Narration delivery contract used by TTS asset generation.",
      "properties": {
        "performance_intent": { "type": "string" },
        "pacing_profile": {
          "type": "string",
          "enum": ["contemplative", "conversational", "energetic", "technical", "cinematic", "custom"]
        },
        "energy_curve": { "type": "string" },
        "pause_policy": { "type": "string" },
        "sample_section_id": {
          "type": "string",
          "description": "Most performance-sensitive section to use for TTS sample approval."
        },
        "provider_notes": {
          "type": "object",
          "additionalProperties": { "type": "string" }
        }
      },
      "additionalProperties": false
    },
    "sections": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "text", "start_seconds", "end_seconds"],
        "properties": {
          "id": { "type": "string" },
          "label": { "type": "string" },
          "text": { "type": "string" },
          "start_seconds": { "type": "number", "minimum": 0 },
          "end_seconds": { "type": "number", "minimum": 0 },
          "speaker_directions": { "type": "string" },
          "delivery_cues": {
            "type": "object",
            "description": "Structured voice-performance cues that TTS generation must apply.",
            "properties": {
              "pace": {
                "type": "string",
                "enum": ["slow", "measured", "conversational", "brisk", "fast", "custom"]
              },
              "energy": { "type": "string" },
              "emphasis_words": {
                "type": "array",
                "items": { "type": "string" }
              },
              "pause_before_seconds": { "type": "number", "minimum": 0 },
              "pause_after_seconds": { "type": "number", "minimum": 0 },
              "delivery_note": { "type": "string" },
              "provider_text": {
                "type": "string",
                "description": "Provider-ready narration text, including purposeful punctuation or SSML break tags when supported."
              }
            },
            "additionalProperties": false
          },
          "enhancement_cues": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "type": { "type": "string", "enum": ["overlay", "broll", "diagram", "stat_card", "code_snippet", "animation"] },
                "description": { "type": "string" },
                "timestamp_seconds": { "type": "number" }
              },
              "required": ["type", "description"]
            }
          },
          "pronunciation_guides": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "word": { "type": "string" },
                "phonetic": { "type": "string" }
              },
              "required": ["word", "phonetic"]
            }
          },
          "source_ref": {
            "type": "string",
            "description": "Reference to the research_brief data point or URL that supports this claim. Every factual claim should be traceable."
          }
        },
        "additionalProperties": false
      },
      "minItems": 1
    },
    "metadata": { "type": "object" }
  },
  "additionalProperties": false
}