# Temporal

Resolve ANY named time window, today, yesterday, thisWeek, lastWeek, last7Days...

- Repository: https://github.com/HarnessMD/munder-difflin (9274 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add HarnessMD/munder-difflin --skill temporal -g -a claude-code -y`
Codex: `npx skills add HarnessMD/munder-difflin --skill temporal -g -a codex -y`
Cursor: `npx skills add HarnessMD/munder-difflin --skill temporal -g -a cursor -y`
Gemini CLI: `npx skills add HarnessMD/munder-difflin --skill temporal -g -a gemini-cli -y`

## Description

Resolve ANY named time window, today, yesterday, thisWeek, lastWeek, last7Days, last30Days, last90Days, thisMonth, lastMonth, thisQuarter, lastQuarter, thisYear, lastYear, last12Months, or an arbitrary range (lastNdays / lastNweeks / lastNmonths) to a concrete ISO date range relative to your run time. Read-only: no writes, no network. Use whenever a task is time-scoped and you need exact start/end dates without computing them by hand.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

## /temporal, concrete date ranges, relative to now

This is the single source of truth for "what dates does *<window>* mean right
now?". It resolves named windows to **concrete ISO date ranges relative to your
run time** (`new Date()` at the moment you invoke it), so you never re-derive
dates manually. It only reads the clock and prints, no files written, no network.

### Run it

```bash
# all windows at once (a quick temporal-context dump)
node "$AGENT_DIR/.claude/skills/temporal/when.mjs"

# one or several specific windows
node "$AGENT_DIR/.claude/skills/temporal/when.mjs" last30Days thisQuarter

# JSON only (machine-readable), or list the supported keywords
node "$AGENT_DIR/.claude/skills/temporal/when.mjs" --json last7Days
node "$AGENT_DIR/.claude/skills/temporal/when.mjs" --list
```

If `$AGENT_DIR` is somehow unset, the script also lives under
`~/.claude/skills/temporal/when.mjs`.

### Windows

| Keyword | Meaning |
| --- | --- |
| `today` / `yesterday` | the single civil day |
| `thisWeek` / `lastWeek` | ISO week (Mon-start); *this* = Mon→today, *last* = the full prior Mon→Sun |
| `last7Days` / `last30Days` / `last90Days` | rolling N-day window ending today (inclusive) |
| `thisMonth` / `lastMonth` | *this* = 1st→today; *last* = the full prior calendar month |
| `thisQuarter` / `lastQuarter` | *this* = quarter-start→today; *last* = the full prior quarter |
| `thisYear` / `lastYear` | *this* = Jan 1→today (YTD); *last* = the full prior year |
| `last12Months` | rolling 12 months ending today |
| `lastNdays` / `lastNweeks` / `lastNmonths` | arbitrary rolling window, e.g. `last45days`, `last2weeks`, `last6months` |

Aliases: `ytd`, `qtd`, `mtd`, `wtd`, `7d`, `30d`, `90d`, `12m`.

Convention: `this*` windows are **period-start → today** (to-date); `last*`
named periods are the **full prior complete period**.

### Output

Each window prints a human line plus a JSON record:

The rest: https://github.com/HarnessMD/munder-difflin/blob/HEAD/resources/skills/temporal/SKILL.md