{
  "id": "06-files-cloud",
  "title": "Files, editor, WebDAV",
  "icon": "☁",
  "level": "intermediate",
  "lessons": [
    {
      "id": "6.1",
      "title": "Edit and compare files",
      "objective": "Use the editor and diff tools on the VFS.",
      "minutes": 9,
      "commands": [
        "edit",
        "diff",
        "find",
        "files"
      ],
      "blocks": [
        {
          "type": "text",
          "text": "`edit` opens the VFS editor. `diff` compares two files. `find` searches names; `files` opens the visual browser."
        },
        {
          "type": "cmd",
          "text": "edit hello.txt"
        },
        {
          "type": "cmd",
          "text": "find hello"
        },
        {
          "type": "cmd",
          "text": "diff hello.txt hello.txt"
        },
        {
          "type": "tip",
          "text": "The editor calls the tutorial/file-saved hook, so exercise progress can be detected from a save."
        },
        {
          "type": "cmd",
          "text": "files"
        }
      ],
      "exercise": {
        "instruction": "Search for your file by name.",
        "accept": [
          "find hello",
          "find hello.txt"
        ],
        "check": {
          "type": "command"
        },
        "hint": "Type: find hello"
      },
      "quiz": {
        "q": "Which command opens the visual file manager?",
        "options": [
          "files",
          "ls",
          "cat"
        ],
        "answer": 0
      },
      "sources": [
        "modules/ext/editor.js",
        "modules/ext/diff.js",
        "modules/ext/filemgr.js"
      ]
    },
    {
      "id": "6.2",
      "title": "Cloud sync and login",
      "objective": "Understand WebDAV auth, the space token, and the 401 self-heal path.",
      "minutes": 14,
      "commands": [
        "webdav-login",
        "webdav-config",
        "webdav-status",
        "webdav-push",
        "webdav-backup"
      ],
      "blocks": [
        {
          "type": "text",
          "text": "WebDAV syncs your VFS to your space. The module holds a SPACE token, not your personal token; it refreshes on 401."
        },
        {
          "type": "cmd",
          "text": "webdav-status"
        },
        {
          "type": "cmd",
          "text": "webdav-login"
        },
        {
          "type": "warn",
          "text": "Sessions do not cross browser contexts. If a push 401s, run `webdav-login` in THIS browser, then retry."
        },
        {
          "type": "cmd",
          "text": "webdav-push"
        },
        {
          "type": "cmd",
          "text": "webdav-backup"
        }
      ],
      "exercise": {
        "instruction": "Check the WebDAV status.",
        "accept": [
          "webdav-status"
        ],
        "check": {
          "type": "command"
        },
        "hint": "Type: webdav-status"
      },
      "quiz": {
        "q": "A 401 push usually means…",
        "options": [
          "the file is too big",
          "no session/token in this browser context",
          "WebDAV is disabled"
        ],
        "answer": 1
      },
      "sources": [
        "modules/ext/webdav.js"
      ]
    }
  ]
}