[
  {
    "id": "ILL-U01",
    "file": "construction-interfaces.svg",
    "title": "Construction interfaces",
    "alt": "Guesthouse project controller, protected crossing footprint, and construction stock ledger with normal and blocked examples.",
    "caption": "Illustrative layouts for UX01–UX03. The example guesthouse bills and stage stock follow FP-C01; a marked player chest blocks the crossing rather than being overwritten. Available, committed, built, and recoverable stock remain distinct. Values are planning examples.",
    "source_ids": [
      "UX01",
      "UX02",
      "UX03",
      "SET01",
      "SET02",
      "FP-C01",
      "FP-C03",
      "FP-PLAN-03",
      "FP-PLAN-04",
      "FP-PLAN-13",
      "FP-PLAN-14",
      "FP-PLAN-16"
    ],
    "related_chapters": [
      "Settlements and authored adventures",
      "Residents and settlement systems",
      "First Playable — Old Valley, the Quarry, and the First Workshop"
    ],
    "slice": 2,
    "kind": "interface"
  },
  {
    "id": "ILL-U02",
    "file": "community-interfaces.svg",
    "title": "Community and return interfaces",
    "alt": "Regional activity bounds, ownership and shared material receipts, and a return-to-play journal after the quarry improvement.",
    "caption": "Illustrative layouts for UX04–UX06. Managed activity needs eligible participants within the correct dimension and horizontal and vertical bounds. Contributions and shared construction are distinct from personal discoveries. The journal keeps Chapter 4 open after the limited first workshop service.",
    "source_ids": [
      "UX04",
      "UX05",
      "UX06",
      "SET01",
      "SET04",
      "FP-PLAN-02",
      "FP-PLAN-07",
      "FP-PLAN-15",
      "FP-PLAN-16",
      "FP-PLAN-17"
    ],
    "related_chapters": [
      "Old Valley",
      "Settlements and authored adventures",
      "Connected adventures and player experience",
      "First Playable — Old Valley, the Quarry, and the First Workshop"
    ],
    "slice": 2,
    "kind": "interface"
  },
  {
    "id": "ILL-U03",
    "file": "expedition-interfaces.svg",
    "title": "Navigation and expedition interfaces",
    "alt": "Copperwash route diagram, a missing-light preparation warning, and an Earth–Moon–Earth route with natural landing ground and protected return supplies.",
    "caption": "Illustrative layouts for UX07–UX08 and UX11. Navigation separates known routes from unexplored branches. The local walking trip uses early tools and ordinary light. The lunar itinerary requires a supported natural arrival and Earth-carried essentials; no lunar pad or refinery is assumed.",
    "source_ids": [
      "UX07",
      "UX08",
      "UX11",
      "EAR02",
      "DST01",
      "FP-PLAN-06",
      "FP-PLAN-16",
      "FP-PLAN-17",
      "T1-OV01",
      "T1-OV02",
      "T1-SPEC-07",
      "T1-SPEC-12",
      "T1-SPEC-15",
      "T1-SPEC-18"
    ],
    "related_chapters": [
      "Shallows",
      "Connected adventures and player experience",
      "First Playable — Old Valley, the Quarry, and the First Workshop",
      "Tier 1 space systems — complete first expedition"
    ],
    "slice": 2,
    "kind": "interface"
  },
  {
    "id": "ILL-U04",
    "file": "space-accessibility-interfaces.svg",
    "title": "Spacecraft and accessibility interfaces",
    "alt": "Six committed Explorer assembly stages, a mission blocked by an open outer hatch, and accessibility settings with text and symbol state previews.",
    "caption": "Illustrative layouts for UX09–UX10 and UX12. The six committed Explorer stages follow T1-SPEC-06; the station controls an explicitly linked vehicle berth. Mission readiness names the immediate blocker and keeps return fuel and breathing reserves protected. Readable static states survive reduced motion and effects. Numeric fuel, oxygen, and cargo capacities are intentionally not invented.",
    "source_ids": [
      "UX09",
      "UX10",
      "UX12",
      "T1-M02",
      "T1-M07",
      "T1-V01",
      "T1-SPEC-06",
      "T1-SPEC-09",
      "T1-SPEC-12",
      "T1-SPEC-15",
      "T1-SPEC-17",
      "T1-SPEC-18"
    ],
    "related_chapters": [
      "Spacecraft and orbital places",
      "Tier 1 space systems — complete first expedition",
      "Tier 1 — Model and Implementation Specifications",
      "Connected adventures and player experience"
    ],
    "slice": 2,
    "kind": "interface"
  }
]