moment → dayjs

@omnimod/plugin-moment-to-dayjs migrates a Moment.js codebase to Day.js. Day.js mirrors most of Moment's chained API, so once the base import and binding are repointed, the call chains carry over unchanged.

omnimod run moment-to-dayjs "src/**/*.{ts,tsx,js,jsx}" --write

The target project needs dayjs installed (and, for the flagged APIs below, the relevant Day.js plugins).

Example

// before
import moment from "moment";
export const d = moment("2020-01-01").add(1, "day").format("YYYY-MM-DD");

// after
import dayjs from "dayjs";
export const d = dayjs("2020-01-01").add(1, "day").format("YYYY-MM-DD");

Automated

• Repoints the moment import source to dayjs.
• Renames the default binding moment → dayjs (import specifier and every call site). An aliased default (import m from "moment") keeps its name and only has its source repointed.
• Rewrites the type-only { Moment } import (and its annotations) to { Dayjs }.
• API-mirrored chained methods (.format, .add, .subtract, .diff, .isBefore, .isAfter, .toDate, .unix, …) carry over untouched.

Flagged for follow-up

APIs that Day.js only exposes through a plugin are not removed — the renamed call is correct once the plugin is registered. Each gets a warn diagnostic and a // TODO(omnimod) line naming the plugin to add:

• moment.utc() → dayjs/plugin/utc
• moment.duration() → dayjs/plugin/duration
• .fromNow() / .from() / .to() → dayjs/plugin/relativeTime
• .calendar() → dayjs/plugin/calendar
• .isBetween() → dayjs/plugin/isBetween
• locale loading → explicit import "dayjs/locale/<name>"