LINE Quiz Bot Workflow: Spaced Repetition with Claude & n8n

Turn LINE Book Photos into Daily Spaced-Repetition Quizzes (Claude + n8n)

This LINE Quiz Bot workflow uses n8n and Anthropic Claude to convert book-page photos into structured multiple-choice questions, track each user’s answers, and automatically send daily spaced-repetition review on LINE.

What this workflow does

• Receives LINE webhook events (messages and postbacks) and also runs on a daily schedule to power the review flow.
• When a user sends an image, the workflow downloads it from the LINE content API, confirms receipt immediately, and then sends the page for processing.
• Claude transcribes the page and generates a configurable number of four-choice questions.
• Generated questions are validated for structure, evidence, and language consistency. If valid, they are stored in an n8n Data Table.
• The workflow then pushes the first question to the user as a LINE Flex Message. If questions aren’t valid, it sends a retry message requesting a clearer page.
• On answer taps (LINE postback), it retrieves the question, judges correctness, replies with an explanation card, and updates progress + next review date in a second Data Table.
• On “Next question,” it loads the remaining questions for that page and sends the next Flex card until the page is complete.
• Each morning, the scheduled run selects due review questions per user, builds a LINE Flex carousel, and sends the review set.

Use cases

• Study bots for books where users upload pages and receive guided recall practice in LINE.
• Automation engineers deploying spaced-repetition question flows with n8n + Claude and persistent progress tracking via Data Tables.
• SaaS operators building quiz/revision experiences without manual scheduling or spreadsheets.

Technical details

• Core nodes/logic: webhook, if, set, code, split out, n8n Data Table.
• Integrations: LINE Messaging API (webhooks + content download) and Anthropic Claude for transcription and quiz generation.