{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-lassen-trail-conditions-recheck",
        "evidence_ids": [
          "evidence-lassen-trail-conditions-recheck"
        ],
        "predicate": "pretrip_trail_conditions_recheck",
        "spatial_scope_ids": [
          "scope-route-lassen-peak-trail",
          "scope-route-brokeoff-mountain-trail",
          "scope-route-cinder-cone-trail",
          "scope-route-bumpass-hell-trail",
          "scope-route-devils-kitchen-trail",
          "scope-route-boiling-springs-lake-trail",
          "scope-route-terminal-geyser-trail"
        ],
        "subject_id": "park-lassen-volcanic-national-park",
        "temporal_scope": null,
        "value": {
          "required": true,
          "topics": [
            "trail_status",
            "road_access",
            "snow",
            "bridges",
            "burned_area_hazards",
            "parking_limits"
          ],
          "warning": "trail status alone does not establish road or park-wide access"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-lassen-trail-conditions-recheck",
          "evidence_id": "evidence-lassen-trail-conditions-recheck",
          "notes": "",
          "observation_id": "observation-nps-lassen-trail-conditions-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS publishes dated, area-specific trail status, mileage, difficulty, parking notes, snow, bridge, and Dixie Fire impacts and warns that trail status does not establish road or park-wide access.",
          "observation_id": "observation-nps-lassen-trail-conditions-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T03:30:00+00:00",
          "source_id": "source-nps-lassen-trail-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/lavo/planyourvisit/trail-conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-trail-conditions"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-lassen-volcanic-national-park",
      "kind": "national_park",
      "name": "Lassen Volcanic National Park"
    },
    {
      "entity_id": "route-devils-kitchen-trail",
      "kind": "route",
      "name": "Devils Kitchen Trail"
    },
    {
      "entity_id": "route-terminal-geyser-trail",
      "kind": "route",
      "name": "Terminal Geyser Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-lassen-nps-foundation",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish a bounded source-backed Lassen Volcanic National Park planning foundation from current official NPS and linked first-party operational sources.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add a bounded official-source Lassen Volcanic National Park planning foundation with explicit source conflict, operational rechecks, and deferred-detail gaps."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-boiling-springs-route-graph",
      "evidence_refs": [
        "evidence-lassen-boiling-trailhead-dream",
        "evidence-lassen-boiling-dream-hot-springs-west",
        "evidence-lassen-boiling-hot-springs-west-pct",
        "evidence-lassen-boiling-pct-link",
        "evidence-lassen-boiling-pct-approach",
        "evidence-lassen-boiling-west-approach",
        "evidence-lassen-boiling-lake-southeast",
        "evidence-lassen-boiling-southeast-northeast",
        "evidence-lassen-boiling-northeast-north",
        "evidence-lassen-boiling-north-lake",
        "evidence-lassen-boiling-pct-north",
        "evidence-lassen-boiling-north-connector"
      ],
      "knowledge_gap_refs": [
        "gap-lassen-specific-route-topology"
      ],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish the official distance-bearing Warner Valley approach and Boiling Springs Lake circuit without flattening its shared and parallel branches.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add the exact official Boiling Springs Lake approach and circuit graph while preserving shared and parallel topology."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-bumpass-route-graph",
      "evidence_refs": [
        "evidence-route-segment-bumpass-trailhead-basin-approach",
        "evidence-route-segment-bumpass-basin-approach-entry",
        "evidence-bumpass-hell-basin-route-description",
        "evidence-bumpass-hell-source-profile-variations"
      ],
      "knowledge_gap_refs": [
        "gap-lassen-bumpass-full-basin-circulation",
        "gap-lassen-bumpass-source-profile-conflicts",
        "gap-lassen-specific-route-topology"
      ],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish the official distance-bearing Bumpass Hell parking-to-basin approach, while preserving boardwalk, alternate-route, and source-profile uncertainty.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add the official distance-bearing Bumpass Hell parking-to-basin approach, preserve source-page profile conflicts, and defer boardwalk and alternate-route choices explicitly."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-cinder-cone-route-graph",
      "evidence_refs": [
        "evidence-cinder-trailhead-nobles-junction",
        "evidence-cinder-nobles-junction-base-fork",
        "evidence-cinder-base-fork-summit",
        "evidence-cinder-cone-official-trailhead-coordinate",
        "evidence-cinder-cone-route-detail",
        "evidence-cinder-cone-source-profile-variation",
        "evidence-cinder-cone-source-profile-variation-nps"
      ],
      "knowledge_gap_refs": [
        "gap-lassen-cinder-rim-crater-circulation",
        "gap-lassen-cinder-source-profile-variation",
        "gap-lassen-specific-route-topology"
      ],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish the official distance-bearing Butte Lake-to-Cinder Cone summit approach while preserving unresolved rim and crater branch roles.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add the exact official Cinder Cone summit approach with trailhead geometry and explicit rim/crater uncertainty."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-destinations-route-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish official-source Lassen destination identities, named hiking routes, evidenced starts, route profiles, and route-condition rechecks without inventing segment topology.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add official-source Lassen destinations, named hiking routes, evidenced trailheads, route profiles, and route-condition rechecks while preserving the remaining segment-topology gap."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-usgs-route-segments",
      "evidence_refs": [
        "evidence-route-segment-lassen-peak-trailhead-summit",
        "evidence-route-segment-brokeoff-trailhead-summit"
      ],
      "knowledge_gap_refs": [
        "gap-lassen-specific-route-topology"
      ],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish official USGS/NPS physical trail-segment topology and source-field distance for the unbranched Lassen Peak and Brokeoff Mountain routes.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add official USGS/NPS source-field distances and complete bidirectional segment graphs for Lassen Peak Trail and Brokeoff Mountain Trail while preserving the branched-route reconciliation gap."
    },
    {
      "action": "REPLACE",
      "change_set_id": "wp-20260923-lassen-warner-valley-route-graph",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/gaps/gap-lassen-specific-route-topology.json",
      "reason": "Publish an evidence-bounded Warner Valley segment graph for Devils Kitchen and Terminal Geyser while preserving unprinted leg distances as unknown.",
      "record_id": "gap-lassen-specific-route-topology",
      "record_type": "gap",
      "summary": "Add the shared Warner Valley segment topology for Devils Kitchen and Terminal Geyser, preserve printed cumulative milepoints, and narrow the remaining Lassen route-topology gap."
    }
  ],
  "navigation": {
    "next_id": "gap-lassen-wilderness-zone-details",
    "position": 231,
    "previous_id": "gap-lassen-current-conditions",
    "total": 299
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "NPS publishes dated, area-specific trail status, mileage, difficulty, parking notes, snow, bridge, and Dixie Fire impacts and warns that trail status does not establish road or park-wide access.",
      "observation_id": "observation-nps-lassen-trail-conditions-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T03:30:00+00:00",
      "source_id": "source-nps-lassen-trail-conditions"
    }
  ],
  "record": {
    "gap_id": "gap-lassen-specific-route-topology",
    "question": "What exact segment traversal connects each remaining published Lassen trailhead and destination, including shared junctions and alternatives?",
    "reason": "Wayproof publishes complete, bidirectional, distance-bearing trailhead-to-summit approaches for Lassen Peak and Brokeoff Mountain, plus a bounded summit approach for Cinder Cone; a connected distance-bearing parking-to-basin-entry graph for Bumpass Hell; and the atomic shared approach plus around-lake network for Boiling Springs Lake. Cinder Cone rim/crater circulation and the full Bumpass basin circulation remain explicit route-specific gaps. It also publishes ordered, bidirectional Warner Valley topology for Devils Kitchen and Terminal Geyser, but atomic leg distances remain unknown where route descriptions print only cumulative positions. These remaining questions still require route-specific reconciliation.",
    "related_ids": [
      "claim-lassen-trail-conditions-recheck",
      "route-devils-kitchen-trail",
      "route-terminal-geyser-trail"
    ]
  },
  "record_type": "gap",
  "related_records": [
    {
      "record": {
        "claim_id": "claim-lassen-trail-conditions-recheck",
        "evidence_ids": [
          "evidence-lassen-trail-conditions-recheck"
        ],
        "predicate": "pretrip_trail_conditions_recheck",
        "spatial_scope_ids": [
          "scope-route-lassen-peak-trail",
          "scope-route-brokeoff-mountain-trail",
          "scope-route-cinder-cone-trail",
          "scope-route-bumpass-hell-trail",
          "scope-route-devils-kitchen-trail",
          "scope-route-boiling-springs-lake-trail",
          "scope-route-terminal-geyser-trail"
        ],
        "subject_id": "park-lassen-volcanic-national-park",
        "temporal_scope": null,
        "value": {
          "required": true,
          "topics": [
            "trail_status",
            "road_access",
            "snow",
            "bridges",
            "burned_area_hazards",
            "parking_limits"
          ],
          "warning": "trail status alone does not establish road or park-wide access"
        }
      },
      "record_id": "claim-lassen-trail-conditions-recheck",
      "record_type": "claim"
    },
    {
      "record": {
        "entity_id": "route-devils-kitchen-trail",
        "kind": "route",
        "name": "Devils Kitchen Trail"
      },
      "record_id": "route-devils-kitchen-trail",
      "record_type": "entity"
    },
    {
      "record": {
        "entity_id": "route-terminal-geyser-trail",
        "kind": "route",
        "name": "Terminal Geyser Trail"
      },
      "record_id": "route-terminal-geyser-trail",
      "record_type": "entity"
    }
  ],
  "sources": [
    {
      "locator": "https://www.nps.gov/lavo/planyourvisit/trail-conditions.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-lassen-trail-conditions"
    }
  ]
}