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Reason Me This Calculations that explain themselves

For rules that are more than a formula. Facts go in, named steps run in order, and every result keeps a trace of how each value was reached.

Rules as data

Write a calculation as a YAML blueprint. Rules, rates and tables are data people can edit; the mechanics that apply them are code.

A cases file lists facts and the outputs they should give. rmt test runs them and reports every difference.

Ask for the trace and see the formula, the table row or each rule that decided a value.

Decimals stay exact from input to output. 0.1 + 0.2 is 0.3, and the CLI prints every number as an exact string.

JSON output and exit codes an agent can loop on, from the first check to publish on the hosted service.

Call a published blueprint from a model with reasons, get exact numbers back, and keep the worked examples as the contract in your build.