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From domain-fintech
Guides financial data modeling for accounting/banking database schemas: account structures (assets/liabilities), ISO 4217 currency handling, decimal precision (BigDecimal/cents), multi-currency ledgers, instruments, temporal patterns.
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/domain-fintech:financial-data-modelingThis skill is limited to the following tools:
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- Designing database schemas for accounting or banking applications
Guides double-entry ledger design: journal entries, chart of accounts, AR/AP/GL sub-ledgers, reconciliation, immutable audit trails, running vs computed balances, ledger-as-event-log. For accounting systems.
Models temporal data with valid-time, transaction-time, and bitemporal dimensions in PostgreSQL using range types and exclusion constraints. Enables time-travel queries for audits, compliance, price histories, and HR reporting.
Enforces fintech domain constraints: decimal precision, immutable audit trails, and transaction consistency. Provides Rust patterns for currency types, event sourcing, and double-entry accounting.
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DECIMAL(19,4) or integer minor units; floating point errors compoundreferences/account-structures-currency.md — chart of accounts hierarchy, account model design, ISO 4217 compliance, floating-point avoidance, rounding rules per jurisdictionreferences/multi-currency-instruments.md — exchange rate management, multi-currency schema, realized vs unrealized FX gains, financial instrument hierarchy, position trackingreferences/temporal-data-integrity.md — effective dating, as-of queries, bi-temporal schema pattern, and data integrity constraints for financial tables