Changelog¶

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.1.0 - 2025-03-18¶

Year-by-year college cost projection engine in nominal dollars.
Single-child projection via project_child_plan().
Multi-child household projection with shared funding pool via project_household_plan().
Bisection solver to find required annual savings via solve_required_savings().
Sensitivity sweep across assumption grids via run_sensitivity().
Three built-in cost profiles: private school, public in-state, public out-of-state.
Age-based glide path support with Vanguard Target Enrollment preset.
Shared fund allocation policies: EQUAL_SPLIT, OLDEST_FIRST, PROPORTIONAL_TO_NEED.
Fisher equation for real/nominal return conversion via normalize_assumptions().
deflate() helper for converting nominal projections to today's dollars.
JSON and dict serialization via to_dict() and to_json().
Comprehensive input validation with descriptive error messages.
Frozen dataclass models with slots=True for all domain objects.
PEP 561 py.typed marker for type checker support.
Full test suite (63 tests) with strict mypy and ruff linting.