Financial ledger system implementing double-entry accounting with ACID guarantees, idempotent payments, and crash-safe async webhooks using PostgreSQL + FastAPI

Production-grade core banking loan management and double-entry accounting service for a fintech lending platform.

Production-grade double-entry ledger with ACID consistency, idempotent posting, FX settlement, and reconciliation.

Rigorous double-entry ledger kernel for Python — no floats, idempotent posting, posting templates

Command-line-first, agent-ready double-entry accounting framework. Built for AI agents and power users. Python/Flask + SQLite.