# Business Rules

## Durable Rules

- The user uploads XML; the user does not submit a report year, report month, cutoff date, or separate monthly-generation request in the primary workflow.
- The Agent returns structured data, which must be validated and successfully committed to the database before downstream monthly processing starts.
- A successful database commit automatically triggers the monthly-report processing program through the business system.
- Year, month, cutoff/as-of date, and similar fields are internal derived execution/audit values. Their presence in code or metadata does not make them user inputs.
- The monthly output contains the exact business dimension/field `TOTAL PRICE`.
- Each monthly XLSX data-row `TOTAL PRICE` cell is a formula whose business meaning is `REAL PRICE × NIGHTS × NO_OF_ROOMS` (current layout example: `=R2*C2*G2`).
- A stored database `total_price` may be used for integrity checking, but it does not replace the required formula in the exported workbook.

## Open Questions

- The internal event/outbox/worker mechanism for automatic dispatch is not yet selected.
- The exact business-time and cutoff derivation policy is not yet specified; the system must derive it without user input.

## Last Reviewed

2026-07-29