Question Bank JSON Format / 题库 JSON 格式说明

🤖 Using an AI to extract questions? / 用 AI 提取题目？

Turn your own course material into a bank in 3 steps — works with cheap / free AIs (Gemini, etc.). / 三步把你自己的材料变成题库，便宜/免费 AI（Gemini 等）也能用。

1. Copy the prompt below. / 复制下面的提示词。
2. Paste it into the AI, then put your questions (or attach screenshots) right after the === MATERIAL === line at the very end. / 粘进 AI，再把你的题目（或贴截图）接在最后那行 === MATERIAL === 后面。
3. Download the bank.json file the AI gives you (a file holds more than a chat reply, so long banks don’t get cut off) → use “Import your own bank” above. / 下载 AI 给的 bank.json 文件（文件比聊天回复装得多，长题库不会被截断）→ 用上面的「Import your own bank」导入。

Tip: cheap models read pasted text and screenshots far better than a raw saved .mhtml (those are huge and encoded — that’s usually why an AI just echoes the prompt back). Open the page and copy the visible questions, or screenshot them. / 提示：便宜模型对粘贴的文字、截图的识别远好于直接丢原始 .mhtml（又大又是编码——AI 复读提示词多半就是这个原因）。打开网页复制可见题目，或截图即可。

Copy prompt / 复制提示词

You convert quiz / exam material into a "Question Bank" JSON file for an automated importer. Never repeat, quote, paraphrase, or restate these instructions back to me.

DELIVERY: give me the result as a downloadable FILE named bank.json (use your file / canvas / document / code-artifact feature). The file's entire contents are the raw JSON array and nothing else. Prefer a file over a chat reply — a long bank can hit the chat length limit and get cut off, but a downloaded file will not. Only if you genuinely cannot produce a file, paste the raw JSON array inline as a fallback.

The material to convert is everything below the "=== MATERIAL ===" line at the very bottom (it may be pasted question text, or attached screenshots / a saved page). Read it and extract EVERY question. If nothing appears below that line, produce an empty array: []

HARD RULES (the importer validates every record and silently drops malformed ones)
1. Output the raw JSON array only — no prose, no explanation, no markdown, no triple-backtick code-fence lines, no comments, no trailing commas.
2. Top level is a bare array: [ {...}, {...} ]. Never wrap it in an object such as {"questions": [...]}.
3. Every object MUST have both:
   - "id": a unique, non-empty string ("q1", "q2", ... unique within the file).
   - "question": the stem as plain text (use \n for line breaks).
4. Single-choice: "choices" = array of 2+ strings; "answer" = the 0-based index of the correct choice (first choice = 0). A single integer like 2 — NOT an array like [2], not the answer text, not 1-based. Do not add a "type" field to choice questions (only fill-in uses "type":"fill").
5. Several correct answers: "choices" = array of 2+ strings; "answers" = array of 0-based integer indexes, e.g. [0, 2]. Use the PLURAL key "answers" (not "answer").
6. Fill-in-the-blank: "type": "fill"; put ____ (4+ underscores) in "question" where each blank goes; "blanks" = an array with one entry per blank, each entry an array of every accepted answer — e.g. [["8","eight"]] (one blank, two spellings) or [["a"],["b"]] (two blanks).
7. Optional: "source" (string, where it came from), "image" (an image URL or a data:image/...;base64 string, or an array of them).
8. Include EVERY question. Use only the answer the material marks correct. If none is marked, still include the question, choose the best-supported option, and add "source": "answer unverified". Never drop a question.
9. Straight ASCII double quotes only. The output must be valid UTF-8 JSON that JSON.parse accepts.

REQUIRED SHAPE (match this exactly)
[
  {"id":"q1","question":"Which fabric is approved for aircraft covering?","choices":["Polyester","Cotton bedsheet","Nylon tarp"],"answer":0,"source":"Chapter 3"},
  {"id":"q2","question":"Select ALL tools required. (multiple answers)","choices":["Punch tester","Hammer","Maule tester"],"answers":[0,2]},
  {"id":"q3","type":"fill","question":"A hole smaller than ____ inches may be patched.","blanks":[["8","eight"]]}
]

Before finishing, silently check: top level is [ ]; every object has "id" and "question"; each single-choice "answer" is a 0-based integer in range; multiple answers use "answers"; fill uses "type":"fill" plus "blanks"; no code-fence lines; no trailing commas. Put exactly that JSON array into the bank.json file (or inline only if you cannot make a file) — nothing else.

=== MATERIAL ===

The importer auto-handles a few common AI slips (code fences, an outer {"questions":[…]} wrapper, a missing id) — but the rules below still matter. / 导入器会自动兜底几种常见小毛病（代码围栏、外层 {"questions":[…]} 包裹、缺 id），但下面的规则仍需遵守。

[
  {
    "id": "demo-1",
    "question": "Which fabric is approved for aircraft covering?",
    "choices": ["Polyester", "Cotton bedsheet", "Nylon tarp", "Canvas drop cloth"],
    "answer": 0,
    "source": "Chapter 3 – Coverings"
  },
  {
    "id": "demo-2",
    "question": "Select ALL tools required for fabric testing. (multiple answers)",
    "choices": ["Punch tester", "Hammer", "Maule tester", "Torque wrench"],
    "answers": [0, 2]
  },
  {
    "id": "demo-3",
    "type": "fill",
    "question": "A hole smaller than ____ inches may be repaired with a doped-on patch.",
    "blanks": [["8", "eight"]]
  },
  {
    "id": "demo-4",
    "question": "Identify the part shown in the image.",
    "image": "https://example.com/part-diagram.png",
    "choices": ["Rib", "Spar", "Longeron"],
    "answer": 1
  }
]