assess

assess is a skill for Claude Code from kazukinagata/shinkoku. It costs 121 tokens per session (6,198 once invoked), scanned A, original, MIT.

A Japanese tax-filing assessment guide that asks about your income, family, and business situation to identify which tax returns you may need.

In plain words
What is it for?
Use it to determine the type of tax filing required, including whether consumption tax applies and which filings may be needed.
Why use it?
It helps you avoid guessing whether you must file an income-tax, consumption-tax, or local-tax return. It asks follow-up questions when information is missing and gives the legal basis for its conclusions.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool.

Part of the shinkoku plugin — 24 skills shipped together

Good fit Use it to determine the type of tax filing required, including whether consumption tax applies and which filings may be needed.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kazukinagata/shinkoku/assess
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 kazukinagata/shinkoku --skill assess
Clone the repo
git clone --depth 1 https://github.com/kazukinagata/shinkoku

Made for: Claude Code.

Or install shinkoku, the plugin that ships this one along with the rest of its 24 skills.

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 assess

README.md
[![agentmods](https://agentmods.dev/badge/skills/kazukinagata/shinkoku/assess/github.svg)](https://agentmods.dev/skills/kazukinagata/shinkoku/assess)
Your own site
<a href="https://agentmods.dev/skills/kazukinagata/shinkoku/assess"><img src="https://agentmods.dev/badge/skills/kazukinagata/shinkoku/assess/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 assess

Your own site · 80×15
<a href="https://agentmods.dev/skills/kazukinagata/shinkoku/assess"><img src="https://agentmods.dev/badge/skills/kazukinagata/shinkoku/assess.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 121 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,198 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 $0.00121 $0.06198
Opus 5 $0.00060 $0.03099
Sonnet 5 $0.00024 $0.01240
Haiku 4.5 $0.00012 $0.00620

Measured 11d ago against content hash 897086cb2878, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

assess 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 11d 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.

skills/assess/SKILL.md · 475 lines

How it starts

The opening of the file, as written. The whole thing — 475 lines — stays where its author put it; the contents beside it link to each section on GitHub.

申告要否・種類の判定(Tax Filing Assessment)

確定申告が必要かどうか、どの種類の申告が必要かを対話的に判定するスキル。 ユーザーの収入状況・家族構成・事業状況をヒアリングし、必要な申告を特定する。

設定の読み込み(最初に実行)

  1. shinkoku.config.yaml を Read ツールで読み込む
  2. ファイルが存在しない場合は /setup スキルの実行を案内して終了する
  3. 設定値を把握し、相対パスは CWD を基準に絶対パスに変換する:
    • db_path: CLI スクリプトの --db-path 引数に使用
    • output_dir: 進捗ファイル等の出力先ベースディレクトリ
    • 各ディレクトリ: ファイル参照時に使用

進捗情報の読み込み

設定の読み込み後、引継書ファイルを読み込んで前ステップの結果を把握する。

  1. .shinkoku/progress/progress-summary.md を Read ツールで読み込む(存在する場合)
  2. 以下の引継書を Read ツールで読み込む(存在する場合):
    • .shinkoku/progress/01-setup.md
  3. 読み込んだ情報を以降のステップで活用する(ユーザーへの再質問を避ける)
  4. ファイルが存在しない場合はスキップし、ユーザーに必要情報を直接確認する

判定の基本方針

  • ユーザーが「収入」で話す場合、内部的に「所得」に変換して判定を行う
  • 判定は所得税 → 消費税 → 住民税の順序で実施する
  • 各判定で根拠となる条文・通達を示す
  • 判定結果は最後にサマリーとして一覧提示する
  • 不明な点がある場合は追加質問で確認する(推測で判定しない)

ヒアリング時の質問設計ルール

  • チェックリストの項目はすべて漏れなく確認すること。ツールの選択肢数制限(AskUserQuestionは1問あたり最大4選択肢)のために項目を省略してはならない。項目数が多い場合は複数回に分けて確認する
  • 1つの事象に複数の側面がある場合(例: 中古住宅を購入してリフォームも実施)は、**複数選択可能(multiSelect: true)**にするか、組み合わせパターンを選択肢に含める
  • 選択肢を設計する前に、その項目が排他的(1つだけ選ぶ)か並立的(複数該当しうる)かを判断する

ステップ1: 基本情報ヒアリング

以下の情報を対話で収集する。一度にすべてを聞かず、自然な会話の流れで段階的に確認する。

1-0. 前年の確定申告の確認

事業所得がある場合(開業2年目以降)、前年の確定申告内容を確認する。 config の past_returns_dir にファイルがあれば参照する。

確認項目
  • 前年の確定申告書(第一表)の有無
  • 前年の事業所得金額(黒字 or 赤字)
  • 前年の申告納税額(㊺欄)— 15万円を超えていたか
  • 予定納税の有無と納付済み金額(第1期・第2期)
  • 純損失の繰越控除の有無(前年以前に青色申告で赤字を出したか)
  • 前年の消費税の課税売上高(基準期間の判定に使用)
予定納税の判定ルール(所得税法第104条)

前年の申告納税額(㊺欄)が 15万円以上 の場合:

  • 第1期(7月): 前年納税額の1/3
  • 第2期(11月): 前年納税額の1/3
  • 残りは確定申告で精算

予定納税を納付済みの場合、確定申告書 ㊹欄「源泉徴収税額」に加算する。

純損失の繰越控除(所得税法第70条)

前年以前3年以内に青色申告で純損失がある場合:

  • 繰越控除可能額を確認する
  • 当年の所得から控除できる

1-1. 給与収入の確認

  • 給与収入の有無と概算金額
  • 給与の支払元の数(1か所 or 複数)
  • 年末調整の実施有無
  • 源泉徴収票の有無

1-2. 給与以外の収入の確認

以下の収入の有無をすべて順に確認する(項目数が多い場合は複数回に分けること):

  • 事業収入(副業・フリーランス)→ 概算金額、開業届の有無、青色申告承認の有無
  • 不動産収入
  • 株式・配当収入(特定口座/一般口座/NISA)→ 1-2a で詳細確認
  • 雑所得(暗号資産、FX、年金等)→ 1-2b, 1-2c で詳細確認
  • 一時所得(保険満期金、懸賞金等)
  • 譲渡所得(不動産売却、ゴルフ会員権等)
  • 退職所得

1-2a. 株式取引の詳細確認(該当者のみ)

Read the full file on GitHub · 475 lines

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. 11d ago First seen · 475 lines · 121 tokens per session scan A 897086cb2878

Subscribe to this mod's changes

assess is a skill published in the GitHub repository kazukinagata/shinkoku (359 stars, last pushed 2d ago), licensed MIT. It adds 121 tokens to every session and 6,198 once invoked, about $0.0006 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 2026-08-30.

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