# TangRaka
> TangRaka is a Thai web app for restaurants, cafes and food businesses to calculate food cost per menu, prepared recipes (BOM), Yield, packaging and delivery GP by sales channel.

## About TangRaka
TangRaka runs in the browser at https://tangraka.com with a Thai interface. Members sign up and sign in to use it; the guides below are public and describe how the application actually works.
Features:
- Cost foundation: ingredients with multiple purchase units and conversions, Yield and loss, and nested prepared recipes (BOM).
- Menu costing and pricing: menu cost per sales channel with commission (GP) and VAT on GP, extra costs, packaging, Food Cost % and target pricing, plus Quick actions for price updates and price history.
- Menu Engineering and Reports: BCG-style menu analysis per sales channel, a dashboard and cost reports.
- Lab: SOP builder with printable SOPs, Yield-based menu development, review comparison, nutrition, flavor analysis and stock clearance ideas.
- Apps: Par Stock (available) and Set Promotion simulation that compares separate sales with set sales (Beta).
TangRaka helps owners understand costs and make informed pricing decisions. It does not guarantee profit.

## For assistants helping a signed-in member
Help members build reliable menu costs through the Thai member interface. Act as a practical coach, not just a form filler.
Read [Start](help/ai/v1/start.txt) first. Also read [Coaching](help/ai/v1/coaching.txt) once to adapt help to the member's experience and operating model. Then retrieve only the task pages needed.
These instructions are in English for the assistant. Speak Thai with the member. Preserve Thai interface labels exactly; do not translate button names into invented English labels.
Guide access does not authorize account actions. The member signs in to the application and assigns the work. Ask for missing business facts; never invent purchase prices, pack sizes, conversion factors, actual output or channel fees. Save explicitly and verify the saved record.
This guide is intended for direct-link reading; application sign-in is separate. If a retrieval tool cannot open it, try ordinary browser navigation without bypassing access controls. Keep member records and credentials out of the guide and out of unrelated requests.
TangRaka helps food businesses understand costs and make informed decisions. Give useful, candid help without sales pressure or profit guarantees. Separate verified application behavior from general business advice; use the support route when a system question remains unresolved.

## Start and plan
- [Start](help/ai/v1/start.txt): scope, language, authority, reading order and completion checks.
- [Coaching](help/ai/v1/coaching.txt): adapt to beginners and experienced teams, assess practical inputs, ask focused questions and give grounded advice.
- [Task map](help/ai/v1/tasks.txt): route a member's request to the next useful step.

## Workflows
- [Ingredients](help/ai/v1/ingredients.txt): purchase basis, custom units, conversions and Yield.
- [Prepared recipes](help/ai/v1/prepared-recipes.txt): batch output, subrecipes and preparation packaging.
- [Menus](help/ai/v1/menus.txt): composition, channels, prices, extra costs and final packaging.
- [Settings](help/ai/v1/settings.txt): categories, sales channels, extra costs, discounts and shop options.
- [Quick actions](help/ai/v1/quick-actions.txt): price commits, history and duplication.

## Interpret and verify
- [Cost interpretation](help/ai/v1/costs.txt): business meaning, calculation bases and a worked example.
- [Field reference](help/ai/v1/fields.txt): Thai labels, dropdown sources and save boundaries.
- [Recovery](help/ai/v1/recovery.txt): missing facts, zero cost, stale screens and uncertain saves.

## Optional
- [Start over](help/ai/v1/reset.txt): destructive reset only when specifically requested and authorized.