What we are building
Small calculators that name the rule version, distinguish facts from user-entered assumptions, and make correction easy. The result is useful first; the explanation is available when you want to audit it.
What we refuse to do
We do not hide uncertainty inside a polished total, collect account identifiers for simple calculations, or label an interpretation “verified” before its review is complete.
Who reviews the numbers
Each rule set is checked against dated primary documents and automated boundary tests. Tax interpretations currently remain marked “professional review pending.” Electricity prediction remains a base-charge preview until real-bill reconciliation is complete. Solar remains a planning scenario until its assumptions receive independent engineering review.