Model changelog
No silent math changes
A calculation model only changes through a versioned specification update: the spec is amended first, the engine follows, and the independent verification harness must pass before release. This page is generated from those specs — it is the complete history, not a curated summary.
- 1.2.0 (2026-08-13, product-approved): BREAKING — removed dead input
- 1.1.0 (2026-08-13, product-approved): two fixes, one of them a
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-14, product-approved): payment rollover — a
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): fixed the no-divorce baseline
- 1.0.0: initial as-implemented spec.
- 1.0.1 (2026-08-13, product-approved): BREAKING — removed dead
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): three changes, one of them
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): fixed the compounding-basis
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-14, product-approved): break-even added months to
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-14, product-approved): `fundingMethod = "heloc"`
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): zero-rate guard (0% mortgage
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): two changes, one of them a
- 1.0.0: initial as-implemented spec.
- 1.0.1 (2026-08-13, product-approved): BREAKING — removed dead input
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): break-even now reports the
- 1.0.0: initial as-implemented spec.
- 1.0.1 (2026-08-13, product-approved): BREAKING — removed dead
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): replaced the hardcoded
- 1.0.0: initial as-implemented spec.
- 1.1.0 (2026-08-13, product-approved): three fixes.
- 1.0.0: initial as-implemented spec.
Unchanged since first verification (12 models)
These models remain at their initial verified version:
529-college-savings v1.0.0, down-payment v1.0.0, emergency-fund v1.0.0, fire v1.0.1, mega-backdoor-roth v1.0.0, one-income v1.0.0, refinance v1.0.0, relocation v1.0.0, roth-vs-traditional v1.0.1, sabbatical v1.0.0, student-loan-payoff v1.0.0, windfall v1.0.1
See all models, contracts, and the verification method at /models.