Linux preflight for iOS/SwiftUI agents. Catch type and complexity failures in seconds—before a Mac VM.

$ ciderflight live_demo/CoffeeOrderBroken.swift --json
{
  "status": "failed",
  "stage": "stage1_typecheck",
  "elapsed_ms": 184.2,
  "delta_line_invariant": 0,
  "sdk_cache": { "cache_hit": true, "frameworks_loaded": 17 },
  "diagnostics": [
    {
      "file": "live_demo/CoffeeOrderBroken.swift",
      "line": 16,
      "column": 39,
      "severity": "error",
      "category": "type_mismatch",
      "message": "cannot convert value of type 'String' to specified type 'Bool'",
      "source_line": "    public var isOrderPlaced: Bool =  \"BROKEN_TYPE_AT_LINE_16_COL_39\""
    }
  ],
  "slow_expressions": [
    {
      "file": "live_demo/CoffeeOrderBroken.swift",
      "line": 35,
      "column": 24,
      "estimated_ms": 340,
      "threshold_ms": 200,
      "category": "viewbuilder_complexity_gate",
      "remediation": "Extract chained arithmetic inside VStack(spacing:) into an explicitly typed local 'let spacingValue: Double' or child @ViewBuilder subview."
    }
  ]
}

$ ciderflight live_demo/CoffeeOrderApp.swift --run-headless --json
{
  "status": "passed",
  "stage": "stage2_headless_elf",
  "stage1_typecheck_ms": 176.4,
  "stage2_exec_ms": 512.8,
  "elapsed_ms": 689.2,
  "delta_line_invariant": 0,
  "diagnostics": [],
  "slow_expressions": [],
  "headless_runtime": {
    "exit_code": 0,
    "assertions_passed": 4,
    "observable_state": { "shotCount": 4, "totalCost": 6.0, "isOrderPlaced": true },
    "pdf_verification": { "header": "%PDF-1.4", "page_count": 1, "receipt_id": "CF-CAFE-2026-001" },
    "layout_snapshot": { "root": "NavigationStack", "overflows_viewport": false, "small_tap_targets": 0 }
  }
}