Parse, format, compare, and validate ISO 8601 date strings using Temporal-based functions.
npx skills add https://github.com/northguild/gmt --skill gmt-basics-northguild
Please help me install this Agent Skill. Skill: gmt-basics Source: https://github.com/northguild/gmt/tree/main/packages/gmt/skills/gmt-basics Command: npx skills add https://github.com/northguild/gmt --skill gmt-basics-northguild
High-intent search queries and answers about installing and using this skill.
Use getNow, getToday, getUtcNow, or getUnixNow from @northguild/gmt, which return ISO 8601 strings or Unix epochs built on the Temporal standard. These functions never construct a Date object and return sentinel values on failure.
Use getIsoWeekDate, which returns the week number together with the week-numbering year so the pair cannot drift apart across year boundaries. Use getWeekYear to read that year on its own.
formatRelativeDate requires a reference option to compare against; without it the function returns the sentinel empty string. GMT functions never throw — they return "", null, false, or [] — so always check results before using them.
Yes. Parsers such as parseDateWithPattern, parseRfc2822, and parseHttp return an empty string for shape-valid-but-unreal dates because Temporal validates the real calendar value after the regex checks the shape. Only arithmetic operations clamp; parsers reject.
isWeekend is locale-aware via Intl.Locale.weekInfo, while isBusinessDay defaults to fixed ISO Monday–Friday. Pass a BusinessCalendar object with weekend, holidays, and timeZone options to isBusinessDay to define custom rules.
expanso-ioNormalize diverse timestamp formats and timezones to UTC with Expanso.
firef1ieCalculate date differences, arithmetic, timezone conversions, and timestamp formatting via AgentPMT API.
openridesphAutomate zero-config linting and formatting setup for JavaScript/TypeScript projects.
twhitehead-blackdogFormat dates, calculate time differences, and generate ranges in the America/Panama timezone.
