@krizaka/time

Date arithmetic for every Krizaka backend, in one place. The « Krizaka first » dates rule (@krizaka/config) refuses a date library inside a package; this is the facade it points to, so addSeconds, addHours, differenceInSeconds and isBefore are written once and the library behind them can change without touching a package.

import { addSeconds, differenceInSeconds, isBefore } from "@krizaka/time";

const resetAt = addSeconds(clock.now(), 900);
if (isBefore(resetAt, clock.now())) { /* ended */ }
const retryAfter = differenceInSeconds(resetAt, clock.now());

• Exact on the instant. Adding two hours adds 7 200 000 ms whatever the server's time zone, so « a session of 14 days » is addHours(now, 14 * 24) and lasts the same on every server, across a daylight-saving change.
• Not the calendar. The day a law, a deadline or a receipt means, in a person's zone, is not arithmetic on an instant: use localDay of @krizaka/intl. For that reason there is no addDays here.
• Missing function? Add it here first (with its test), never import the library beside it.
• Pure: no clock of its own (take a Clock from @krizaka/db), no environment, no I/O.

Validation shapes

isIsoDate (YYYY-MM-DD), isEmail, isHttpUrl, isSlug, isE164Phone, isCanadianPostalCode: type guards on unknown, pure, no I/O. The no-hand-written-validation-regex rule of @krizaka/config refuses a hand-written pattern for these shapes and points here. An email check says the shape is right, never that the mailbox exists. Missing a fact? Add it here first, with its test.