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/lastYear

Resolve "lastYear" to a concrete ISO date range relative to your run time — the previous full calendar year. 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 task

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munder-difflin
9.5k18 skills

Claude Code

$ npx -y skills add harnessmd/munder-difflin --skill lastYear --agent claude-code

SKILL.md

lastYear.SKILL.md
name: lastYear
description: |
  Resolve "lastYear" to a concrete ISO date range relative to your run time —
  the previous full calendar year. 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 task over last year (annual reports, year-over-year).
allowed-tools:
  - Bash

/lastYear

Get the concrete date range for **the previous full calendar year** by running the bundled resolver:

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

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.

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Repo: chaitanyagiri/munder-difflin

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Questions about lastYear.

Which coding agents can use lastYear?
lastYear installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.