{
  "fusion_version": "v1",
  "sources": [
    {
      "source_id": "gsi_coastline",
      "source_type": "coastline_raw",
      "path": "coastline/C23-06_*_GML.zip",
      "scope": "japan",
      "status": "pending",
      "notes": "全国海岸线真值源，仅来自 coastline 原始包"
    },
    {
      "source_id": "fish_port",
      "source_type": "port",
      "path": "coastline/C09-06.zip",
      "scope": "kyushu_sample",
      "status": "pending",
      "notes": "渔港边界与港内判定底座"
    },
    {
      "source_id": "pbf_semantic",
      "source_type": "semantic_db",
      "path": "semantic/pbf_navigation_source.sqlite",
      "scope": "japan",
      "status": "pending",
      "notes": "PBF 语义对象与障碍索引占位（后续接入）"
    }
  ],
  "layers": [
    {
      "layer_key": "coastline_200m",
      "grid_level": 200,
      "role": "base_coast",
      "source_priority": 10,
      "description": "全国海岸线基础层"
    },
    {
      "layer_key": "port_20m",
      "grid_level": 20,
      "role": "port_detail",
      "source_priority": 20,
      "description": "港区精细层"
    },
    {
      "layer_key": "obstacle_overlay",
      "grid_level": 20,
      "role": "overlay",
      "source_priority": 30,
      "description": "PBF 障碍叠加层（后续接入）"
    }
  ],
  "rules": [
    {
      "rule_id": "land_block",
      "classification": "BLOCKED",
      "reason": "land_or_port_structure",
      "trigger_keys": [
        "land",
        "port_structure"
      ],
      "min_source_mask": 1
    },
    {
      "rule_id": "collision_block",
      "classification": "BLOCKED",
      "reason": "collision_hazard",
      "trigger_keys": [
        "collision",
        "fixed_fishing_gear",
        "navigation_hazard"
      ],
      "min_source_mask": 1
    },
    {
      "rule_id": "grounding_caution",
      "classification": "CAUTION",
      "reason": "grounding_or_shoal",
      "trigger_keys": [
        "grounding",
        "shoal",
        "submerged_reef"
      ],
      "min_source_mask": 1
    },
    {
      "rule_id": "boundary_caution",
      "classification": "CAUTION",
      "reason": "boundary_or_route",
      "trigger_keys": [
        "boundary",
        "route"
      ],
      "min_source_mask": 1
    },
    {
      "rule_id": "default_open",
      "classification": "PASSABLE",
      "reason": "open_water",
      "trigger_keys": [],
      "min_source_mask": 0
    }
  ]
}