IPCA & IGP-M — Motor de Reajuste Contratual

To calculate contractual price adjustments, provide the original monetary value, base period, and current period in YYYYMM format. The skill fetches IPCA and IGP-M index data via public APIs and applies the multiplier to return the updated amount.

IPCA and IGP-M index values are fetched from IBGE SIDRA and Banco Central SGS public APIs. The skill retrieves Número-Índice for IPCA and monthly variation for IGP-M to compute accurate contractual updates.

Yes, the skill handles defasagem rules for contract reajuste calculations. It correctly applies the required defasagem logic for IPCA and IGP-M indices and includes optional deflation handling for precise adjustments.

The skill ensures decimal precision during index-based recalculation by using exact decimal arithmetic without intermediate rounding. It integrates Prisma Decimal for storage and downstream computations alongside strict Zod schema validation.

You can use this skill for rent adjustments and private agreements, as well as public contracts. It applies to any contract requiring index-based updates using IPCA or IGP-M, provided you supply the base and current periods.

Traditional rounding fails for IPCA and IGP-M reajuste because it introduces intermediate precision errors. The skill enforces strict decimal arithmetic without intermediate rounding and validates data with a strict schema to ensure auditable results.