Ask a source-cited question

curl --request POST \
  --url https://api.githits.dev/v1/experimental/ask \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "question": "What about async handlers?",
  "thread_id": "01900000-0000-7000-8000-000000000002"
}
'

{
  "answer_markdown": "Express forwards synchronous errors to error middleware. [Source 1]",
  "sources": [
    {
      "url": "https://github.com/expressjs/express/blob/abc123/lib/router/index.js#L1-L20"
    }
  ],
  "thread_id": "01900000-0000-7000-8000-000000000002",
  "tool_call_id": "01900000-0000-7000-8000-000000000001"
}