{
  "version": 1,
  "project": "底牌",
  "origin": "style_master_v1.png (huayu-image4, 1536x1024) — user approved, v2 rejected",
  "approach": "Higgsfield brand-lock pattern: single source of truth, verbatim prompt block appended to every paid generation call",
  "model_media_roles": {
    "huayu-image4": "text-to-image; no media input; scenes 16:9, portraits 2:3",
    "lingshu-edit": "image edit; 1 base image (+1-2 refs if supported); prompt describes ONLY what changes",
    "minimax-h3": "image-to-video; exactly 1 start_image; prompt describes motion only (camera verbs + subject action)",
    "lingshu-i2v": "image-to-video; exactly 1 start_image; prompt describes motion only",
    "runninghub-kling-i2v / runninghub-seedance-i2v": "fallback i2v; same single-start-frame rule"
  },
  "palette": {
    "sky": [
      "#0A1420",
      "#1C3A57"
    ],
    "far_mountains": "#2C4A66",
    "mid_mountains": "#19304A",
    "dark_rock": "#0D1924",
    "rock_rim": "#24384C",
    "snowfield": "#A9BECE",
    "snow_shadow": "#7E97AC",
    "fire_amber": "#E8A33D",
    "fire_deep_amber": "#B9711E",
    "rim_cyan": "#79CFEF",
    "spellfire_cyan": "#58C9FF",
    "spellfire_core_white": "#E2F7FF"
  },
  "lighting_rules": [
    "Cold steel-blue night is the only global mood; no warm daylight ever",
    "Silhouettes are dark but always carry a thin rim light: cyan #79CFEF from the moon side, amber from firelight side",
    "Brightest point of any frame is fire or spellfire, never the sky"
  ],
  "signature_devices": {
    "blue_flame": "electric cyan #58C9FF + white core #E2F7FF; belongs EXCLUSIVELY to Emedar; appears only in scenes 4/11/13",
    "campfire": "amber #E8A33D only, belongs to the apprentice side",
    "atmosphere": "drifting snow particles + volumetric mist bands + soft vignette in every exterior shot"
  },
  "character_rules": {
    "era": "four heroes as teenage apprentices under 20 years old, slim, pre-fame",
    "readability": "each character must be identifiable by silhouette alone (posture, build, props)",
    "props": {
      "雅戈 yago": "wooden staff, slightly hunched, steady pose",
      "帕尔卡 palka": "chubby, curly hair, blanket on shoulders",
      "斯布雷斯 spress": "hunched back, hooded cloak, leans forward, restless",
      "艾梅达尔 emedar": "tall and thin, long hair, sleeves drawn back; the only one allowed blue"
    },
    "consistency": "one canonical image per character locked as edit reference; later generations never redraw the face"
  },
  "forbidden": [
    "No text, watermark, HUD, UI, borders",
    "No saturated colors other than the two reserved lights",
    "No flat-cutout look (that was rejected style v2)",
    "No adult-looking heroes; always under-20 apprentices",
    "No direct extraction of material from ref_warlock_teaser.f398.mp4 / ref_warlock_mirror.f399.mp4"
  ],
  "prompt_lock_block": "[STYLE LOCK — DO NOT DEVIATE]\nCinematic dark fantasy matte painting, heavy painterly realism, cold steel-blue night, moonlit snowfield, drifting snow particles, volumetric mist, soft vignette. Dark silhouettes with thin cyan rim light #79CFEF on the moon side; amber campfire light #E8A33D only near fires. Saturated electric-cyan spellfire #58C9FF with white-hot core #E2F7FF is reserved exclusively for Emedar's blue flame. Young teenage apprentices under 20 years old, slim, readable by silhouette. No text, no watermark, no HUD, no UI.",
  "usage": "Append prompt_lock_block verbatim to every huayu-image4 / lingshu-edit / i2v prompt; change only the asset-specific content before it.",
  "lock_states": {
    "palette": "fixed",
    "lighting_rules": "fixed",
    "signature_devices": "fixed",
    "character_rules": "fixed",
    "forbidden": "fixed",
    "prompt_lock_block": "fixed"
  },
  "evidence_labels": {
    "palette": "measured - sampled from style_master_v1.png, the user-approved v1 style master",
    "lighting_rules": "visually-observed on style_master_v1.png + user-approved",
    "signature_devices": "source-declared - user decision: cyan spellfire exclusively Emedar, only scenes 4/11/13",
    "character_rules": "source-declared - user instruction: under-20 apprentices; baike dossiers merged into 剧本-底牌.md",
    "forbidden": "source-declared - user instruction"
  },
  "canonical_reference_roles": {
    "char_<id>_canonical.png": "controls ONLY face, hair, build, costume, signature silhouette of that character; must not control the new shot's palette, lighting, or composition",
    "scene_XX_<slug>.png": "controls composition and placement for that scene; palette and lighting always come from the lock block",
    "style_master_v1.png": "global style reference - style only, never content"
  }
}