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Claude API (custom app, built with Claude Code)

Run a cake studio's orders and review requests with a Claude-powered assistant

Quick answer

Marin Cake Studio in San Rafael, California ran on invoicing software, an email tool, a paper calendar and a phone. The owner's husband built one app with Claude for orders, inventory, recipes and payments, with an assistant that drafts replies and review requests for her to approve. 8 of the first 9 review requests got a review.

Business type: Restaurants & cafés. Tool used: Claude API (custom app, built with Claude Code). Result: Live in a real bakery in 12 days. In the first week the review requests went to 9 customers and 8 left a review. Two bugs showed up later (a sync that marked paid customers unpaid, and a silent failure) and were fixed.

Source: Builder's case study (Shared by the builder) · Last updated 2026-10-19

ToolClaude API (custom app, built with Claude Code)BusinessRestaurants & cafésTaskOperations & admin, Reviews, Bookkeeping & invoicesSourceBuilder's case study (Shared by the builder)

How they set it up

  1. Write down every step a cake order goes through: quote, invoice, deposit, calendar, shopping list, review request.
  2. Build one app that holds orders, customers, inventory, recipes and payments.
  3. Add an assistant that answers questions from live business data, like 'am I low on butter?'
  4. Have it draft replies to overnight inquiries, reminders and review requests each day, and send nothing without the owner's yes.
  5. Record where each order comes from. The builder wishes he had, so he could tell which features work.

Result

Live in a real bakery in 12 days. In the first week the review requests went to 9 customers and 8 left a review. Two bugs showed up later (a sync that marked paid customers unpaid, and a silent failure) and were fixed. (as reported by the source)

Starter prompt

Our own prompt for copying this setup. Swap in your details. Not quoted from the source.

You help me run [Bakery]. Each morning, list new inquiries and draft a reply with a quote from my price list. Draft review requests for customers who picked up an order 2 days ago. Show me everything before it sends. Tell me what ingredients I'm low on for this week's orders.

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