yesterday

Agent Skills › chaitanyagiri/munder-difflin › yesterday

yesterday

GitHub

将“yesterday”解析为具体的ISO日期范围，返回包含本地时区的起止日期及精确UTC时间戳。作为日期计算的权威来源，避免手动计算，适用于昨日数据查询、日报生成等任务。

resources/skills/yesterday/SKILL.md chaitanyagiri/munder-difflin

Trigger Scenarios

需要获取昨天具体日期的场景编写或查询基于昨日时间范围的数据报告

Install

npx skills add chaitanyagiri/munder-difflin --skill yesterday -g -y

More Options

Non-standard path

npx skills add https://github.com/chaitanyagiri/munder-difflin/tree/main/resources/skills/yesterday -g -y

Use without installing

npx skills use chaitanyagiri/munder-difflin@yesterday

指定 Agent (Claude Code)

npx skills add chaitanyagiri/munder-difflin --skill yesterday -a claude-code -g -y

安装 repo 全部 skill

npx skills add chaitanyagiri/munder-difflin --all -g -y

预览 repo 内 skill

npx skills add chaitanyagiri/munder-difflin --list

SKILL.md

Frontmatter

{
    "name": "yesterday",
    "description": "Resolve \"yesterday\" to a concrete ISO date range relative to your run time —\nyesterday. Returns inclusive civil dates plus exact UTC instants so you have\ntemporal context without computing dates by hand. Read-only: no writes, no\nnetwork. Use before a task scoped to yesterday (daily reports, \"what changed yesterday\").\n",
    "allowed-tools": [
        "Bash"
    ]
}

/yesterday

Get the concrete date range for yesterday by running the bundled resolver:

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

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.