{
  "kit_reader": [
    "SWAK",
    { "fs_root": "." }
  ],
  "header": [
    { "From": "nobody@example.com" },
    { "To"  : "nobody@example.net" }
  ],
  "alternatives": [
    { "type": "text/plain", "path": "first.txt"       },
    { "type": "text/plain", "path": "/kit/second.txt" },
    { "type": "text/plain", "path": "/dist/File-ShareDir/sample.txt" },
    { "type": "text/plain", "path": "/fs/t/misc/fourth.txt" }
  ]
}