> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://pos-api-docs.lucky-tom.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://pos-api-docs.lucky-tom.com/_mcp/server.

# Overview

FR27–FR29. Unnamed buyer. POST requires Idempotency-Key. Discriminator `productCode`: triple_tom | pega_tom | bingo_tom. Print `publicCode`. Lookups are reprint/support, not the public validator (FR51).