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- AnchorContext frozen dataclass: 锚节点生成上下文(node_id, card_text, frame_paths, subtitle, distractor_texts) - TaskTypeSpec frozen dataclass: 题型生成规格(level, needs_frames, frame_count, context_fields) - TASK_TYPE_LEVEL_MAP: 12 种 Video-MME 题型 → 树层级 + 生成规格映射 - 11 项单元测试覆盖:映射完整性、值类型、层级合法性、frozen 不变性 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>