Plain ES modules, MIT licensed. Start with README.md and engine.js; the bundle of all of them is netnet-recipes.mjs, the catalog recipes.json, the desk kit/.
README.mdadvance.jsbonds.jsbuybacks.jscore.jsdesk.jsengine.jsgrowth.jsholders.jsindex.jsloop.jslp.jspredict.jsPure helpers they import: lib/advanceMath.js, lib/bondDemand.js, lib/treasuryGrowth.js, components/chain/credit/liqMath.js, components/chain/credit/fmt.js.