markets

markets is a skill for Claude Code from muji-j/jp-power-tools. It costs 215 tokens per session (732 once invoked), scanned A, original, MIT.

A reference skill for Japan’s electricity markets, including JEPX trading, balancing, capacity, futures, environmental-value, and imbalance settlement systems.

In plain words
What is it for?
Use it to understand Japanese power-market mechanics, check trading timelines and reform schedules, draft balancing-market bid CSVs, or retrieve specified market data.
Why use it?
It helps clarify market rules, bidding and settlement logic, deadlines, prices, grid-area differences, and scheduled system changes.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

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

Good fit Use it to understand Japanese power-market mechanics, check trading timelines and reform schedules, draft balancing-market bid CSVs, or retrieve specified market data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/muji-j/jp-power-tools/markets
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.

Any agent
npx skills add muji-j/jp-power-tools --skill markets
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 markets

README.md
[![agentmods](https://agentmods.dev/badge/skills/muji-j/jp-power-tools/markets/github.svg)](https://agentmods.dev/skills/muji-j/jp-power-tools/markets)
Your own site
<a href="https://agentmods.dev/skills/muji-j/jp-power-tools/markets"><img src="https://agentmods.dev/badge/skills/muji-j/jp-power-tools/markets/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for markets

Your own site · 80×15
<a href="https://agentmods.dev/skills/muji-j/jp-power-tools/markets"><img src="https://agentmods.dev/badge/skills/muji-j/jp-power-tools/markets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 215 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 732 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00215 $0.00732
Opus 5 $0.00108 $0.00366
Sonnet 5 $0.00043 $0.00146
Haiku 4.5 $0.00021 $0.00073

Measured 9d ago against content hash 7dbbaa6d2290, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

markets 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 9d 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/markets/SKILL.md · 33 lines

What it actually says

電力市場ドメイン — 市場・取引・制度 (markets)

日本電力市場の市場別ルール・日次タイムライン・年間カレンダー・制度改正ロードマップ。入札/約定/精算ロジック、締切・公表時刻、制度日程を扱う。

参照ファイル

ファイル 内容 読むタイミング
references/markets.md スポット・時間前・市場分断/連系線・需給調整市場・容量市場・先物/先渡/相対・非化石価値取引・インバランス制度・エリア特性・最近の市況・年間カレンダー・制度改正ロードマップ 入札/約定/精算ロジック、時刻・締切・制度日程

関連スキル

  • 用語は jp-power:core../core/references/terms.md)。
  • データ取得(JEPX 約定CSV・予備率・インバランス単価等)は jp-power:data、計算/予測は jp-power:ops

コマンド

  • /power-bid — 需給調整市場の応札CSV下書き(scripts/power_bid.py)。
  • /power-get — スポット/時間前価格・予備率・エリア需給実績を CSV 取得(インバランス単価はMCP経由)。

自然文での応札依頼

自然文で応札CSVを依頼された場合は commands/power-bid.md のライトパス(不足引数の提案→確認→実行)に従う。単価・入札量は自動補完しない(ユーザーの明示入力または確認を経て確定する)。

鉄則

時刻・数値・制度は記憶で断定せず markets.md を確認し、改正の可能性があれば公式(監視委・OCCTO・エネ庁)で再確認する。企業固有の入札価格・数量・戦略は含めない。

Files

What ships with it

1 file 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. 9d ago First seen · 33 lines · 215 tokens per session scan A 7dbbaa6d2290

Subscribe to this mod's changes

markets is a skill published in the GitHub repository muji-j/jp-power-tools (1 stars, last pushed 1mo ago), licensed MIT. It adds 215 tokens to every session and 732 once invoked, about $0.0011 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.