custo-safra

name	custo-safra
description	Calculate and present crop cost estimates from repository-supported inputs with explicit units and assumptions. Use when changing cost composition rural-unit conversion or estimate output. Do not use when the task is climate ZARC or municipality lookup.

Custo safra

• Inspect current cost models conversion helpers and supported units before editing.
• Keep quantity unit unit-price and subtotal explicit for every component.
• Preserve currency and reference-date metadata when available.
• Separate user-provided values from repository reference values.
• Reject incompatible units instead of silently converting them.
• Make assumptions visible in the API or report output.
• Add tests for totals conversions missing values and rounding boundaries.
• Run Ruff and pytest from backend/.