data

data is a skill for Claude Code from muji-j/jp-power-tools. It costs 179 tokens per session (899 once invoked), scanned A, original, MIT.

A guide for collecting Japanese electricity-market data from public sources such as JEPX, OCCTO, and Japan's weather agency. It covers CSV and API downloads, file encodings, update times, and read-only data tools.

In plain words
What is it for?
Use it to download spot prices, forecasts, reserve margins, area supply-demand results, and related public datasets, or verify source URLs and market figures.
Why use it?
It brings source locations and acquisition details together, reducing mistakes when finding, downloading, or automating power-market data.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions Claude Code.

Part of the jp-power plugin — 5 skills, 7 commands shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/muji-j/jp-power-tools/data
Any agent
npx skills add muji-j/jp-power-tools --skill data
Clone the repo
git clone --depth 1 https://github.com/muji-j/jp-power-tools

Made for: Claude Code.

Or install jp-power, the plugin that ships this one along with the rest of its 5 skills, 7 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for data

README.md
[![agentmods](https://agentmods.dev/badge/skills/muji-j/jp-power-tools/data.svg)](https://agentmods.dev/skills/muji-j/jp-power-tools/data)
Your own site
<a href="https://agentmods.dev/skills/muji-j/jp-power-tools/data"><img src="https://agentmods.dev/badge/skills/muji-j/jp-power-tools/data.svg" alt="Measured on agentmods" height="20"></a>
Per session 179 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 899 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00179 $0.00899
Opus 5 $0.00089 $0.00449
Sonnet 5 $0.00036 $0.00180
Haiku 4.5 $0.00018 $0.00090

Measured 5d ago against content hash 6e43c95c9ee7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

data scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

jp-power/skills/data/SKILL.md · 32 lines

What it actually says

電力市場ドメイン — 情報源・データ取得 (data)

公開一次ソースの所在(どこで何を見るか)データ取得方法(CSV/API・エンコーディング・更新時刻・セッション処理)。情報収集・リサーチ・自動化・パイプライン実装の基点。

参照ファイル

ファイル 内容 読むタイミング
references/sites.md 公開情報源ディレクトリ(URL検証マーク付き) 情報収集・リサーチ時の最優先参照 — Web検索より先に
references/data-sources.md データ取得方法(CSV/API・エンコーディング・更新時刻・ボット遮断対応) データ収集・自動化・パイプライン実装

コマンド・スクリプト(プラグイン共通)

  • /power-get — 公開データ(スポット/時間前・予備率・エリア需給実績)を対話取得し CSV(Excel互換 UTF-8 BOM) でダウンロード(scripts/power_get.py)。インバランス単価は実CSV未対応、MCPの読み取り専用ツール経由で参照。
  • /power-verify — sites.md のURL・markets.md の数値・年間日程を公式ソースと突合し、更新提案を出す。
  • scripts/power_data.py — 取得ライブラリ(JEPX・気象庁・Open-Meteo・OCCTO・HJKS 等)。
  • MCPサーバー scripts/power_mcp.pypower_data_mcp)— 取得を読み取り専用 MCP ツールとして公開。Python があれば Claude Code 起動時に自動起動(初回に不足ライブラリ自己導入)。他クライアントは scripts/mcp.example.json。MCPの power_area_actual は東京/九州のみ対応(北海道はCLIの /power-get--dataset area-actual --area 北海道)を利用)。
  • /power-setup — Python・ライブラリ環境の点検・導入。朝ブリーフィング自動化は scripts/power_brief_build.pypower_brief_schedule.py(オン/オフ)。

関連スキル

用語は jp-power:core../core/references/terms.md)、市場規則は jp-power:markets、計算/予測は jp-power:ops

鉄則

記憶上の URL で直行しない(サイト移転が頻繁)— sites.md を優先。利用規約・robots・レート制限を順守(取得間に sleep、キャッシュ推奨)。公開ソースのみ。企業固有システム・内部URL・認証情報は扱わない/出力に混ぜない。

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 32 lines · 179 tokens per session scan A 6e43c95c9ee7

Subscribe to this mod's changes

data is a skill published in the GitHub repository muji-j/jp-power-tools (1 stars, last pushed 1mo ago), licensed MIT. It adds 179 tokens to every session and 899 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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