Last Year

by chaitanyagiri

Last Year is an AI Engineering skill for Claude Code, published by chaitanyagiri in munder-difflin.

2.2K stars253 forkson chaitanyagiri/munder-difflinAdded 2026/08/19+221% in starsRepository updated 2026/08/19

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agentsclaude-codefreeharnessharness-engineeringmemory

Install in seconds

Install Last Year

Copy Last Year into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/chaitanyagiri/munder-difflin/tree/main/resources/skills/lastYear ~/.claude/skills/lastYear

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/chaitanyagiri/munder-difflin.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: resources/skills/lastYear/SKILL.md in chaitanyagiri/munder-difflin
Installs to: ~/.claude/skills/lastYear
Collection: One of 17 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What Last Year does

Last Year resolves the previous full calendar year to a concrete ISO date range with inclusive civil dates and exact UTC instants. Use it before tasks over last year, such as annual reports or year-over-year comparisons.

Last Year is cataloged under AI Engineering on DirSkills. Last Year comes from a repository tagged agents, claude-code, free, harness and harness-engineering.

Documentation

README

From the original repository

/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.

Commands Last Year provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/temporal

Frequently asked about Last Year

What else does chaitanyagiri publish alongside Last Year?
Last Year is one of 17 skills that DirSkills catalogs from chaitanyagiri/munder-difflin, the repository it ships in. Its siblings there include Capability Catalog, Fetch & Summarize and Last 30 Days. Each one is a separate skill with its own page in this directory, installs the same way Last Year does, and is maintained by chaitanyagiri in that same repository. The rest of the collection is listed on the chaitanyagiri/munder-difflin page.
How does Last Year compare to other AI Engineering skills?
Last Year ranks #844 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Last Year against them. Open each page to compare what they document and how they install.