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/last30Days

Resolve "last30Days" to a concrete ISO date range relative to your run time — a rolling 30-day window ending today. Returns inclusive civil dates plus exact UTC instants so you have temporal context without computing dates by hand. Read-only: no writes, no network. Use before a

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munder-difflin
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$ npx -y skills add chaitanyagiri/munder-difflin --skill last30Days --agent claude-code

How it fires

How this skill gets triggered: by you, by Claude, or both.

  • Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
  • You can call itInvoke it directly when you want it.
  • Slash command/last30Days

Context preview

The summary Claude sees to decide when to auto-load this skill.

Resolve "last30Days" to a concrete ISO date range relative to your run time — a rolling 30-day window ending today. Returns inclusive civil dates plus exact UTC instants so you have temporal context without computing dates by hand. Read-only: no writes, no network. Use before a

SKILL.md

last30Days.SKILL.md
name: last30Days
description: |
  Resolve "last30Days" to a concrete ISO date range relative to your run time —
  a rolling 30-day window ending today. Returns inclusive civil dates plus exact UTC instants so you have
  temporal context without computing dates by hand. Read-only: no writes, no
  network. Use before a "last 30 days" / trailing-month task (monthly trends, recent activity).
allowed-tools:
  - Bash

/last30Days

Get the concrete date range for **a rolling 30-day window ending today** by running the bundled resolver:

node "$AGENT_DIR/.claude/skills/temporal/when.mjs" last30Days

It prints a human-readable line plus a JSON record:

  • `start` / `end` — inclusive civil dates (`YYYY-MM-DD`) in your local timezone
  • `startUtc` / `endExclusiveUtc` — the same window as a half-open `[start, end)`

range of exact UTC instants, for timestamp-based queries

  • `days`, `timezone`, `asOf` — the span, your timezone, and when this resolved

Use the returned dates as the time bounds for the task at hand. **Do not derive dates by hand** — this resolver is the source of truth. For the full window list or an arbitrary range (e.g. `last45days`, `last6months`), see the `/temporal` skill.

Read it on GitHub ↗
Ships withmunder-difflin

A local multi-agent harness that works with your existing Claude Code, Codex subscriptions, allows you to run an office of agents

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Repo: chaitanyagiri/munder-difflin

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