Project Plans¶

This section contains project planning documents and phase tracking for the RWA Calculator.

Overview¶

The project follows a phased, test-first approach prioritising CRR (Basel 3.0) implementation before extending to Basel 3.1.

Documents¶

• Implementation Plan - Detailed acceptance test scenarios, contract definitions, and regulatory parameters
• Target Architecture & Migration Plan - Architecture review findings, the rulepack target architecture, and the phased (0-8) strangler migration plan
• Engine Defensiveness — Boundary Hardening - Producer-enforced stage-contract investigation; folded into migration Phase 3 (includes the binding KEEP-guard triage)
• Single-Lazy-Plan Refactor - SUPERSEDED by migration Phase 1; preserves the Polars plan-depth SIGSEGV evidence and the irreducible-barrier finding

Development Philosophy¶

The project adheres to these core principles:

1. Test-Driven Development (TDD) - Tests are written before implementation
2. Phased Delivery - Features are delivered incrementally with clear milestones
3. Regulatory Accuracy - All calculations are validated against regulatory specifications
4. Performance First - LazyFrame operations and vectorized calculations throughout