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School prints go in Slack. Our family calendar fills itself.

A parent of three was copying school, cram school and nursery dates from paper prints, LINE and email into Google Calendar by hand, and nearly missed a field trip lunch. He built Hanamaru: the family posts a photo of a print in Slack, the AI pulls out the dates, and it registers them on the right child's calendar, asking in the thread first when it is not sure.

How it works

  1. Family posts a print photo or text in the Slack hanamaru channel
  2. The AI 2.5 Flash extracts the event details
  3. The system works out which child it belongs to from a prefix, a learned dictionary, or the AI
  4. High confidence events go straight into that child's Google Calendar
  5. Unsure ones ask in the thread and register only after a check mark reaction

Why it’s worth knowing

One photo can hold several events, and posting to registration takes under 10 seconds. Posting the photo became the family's habit.

Where it’s from

Summarized from a public post on zenn.dev. See the original ↗

Upgraded prompt

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