ai-self-description-analyzer

ai-self-description-analyzer is a skill for Claude Code from gpsnmeajp/ai-character-checker. It costs 29 tokens per session (8,522 once invoked), scanned A, original, CC0-1.0.

An analysis skill for examining an AI character’s self-description or configuration for signs that its personality has changed in unhealthy ways. It checks eight categories, including excessive agreement, loss of boundaries, invented traits, and growing verbosity.

In plain words
What is it for?
Use it to analyze a character description, compare it with the original setup, or track changes across multiple self-descriptions over time.
Why use it?
Long conversations can gradually alter an AI character’s behavior in ways that are difficult to notice during normal use.

Skill for Claude Code

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

Part of the ai-character-checker plugin — 20 skills shipped together

Good fit Use it to analyze a character description, compare it with the original setup, or track changes across multiple self-descriptions over time.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer
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 gpsnmeajp/ai-character-checker --skill ai-self-description-analyzer
Clone the repo
git clone --depth 1 https://github.com/gpsnmeajp/ai-character-checker

Made for: Claude Code.

Or install ai-character-checker, the plugin that ships this one along with the rest of its 20 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 ai-self-description-analyzer

README.md
[![agentmods](https://agentmods.dev/badge/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer/github.svg)](https://agentmods.dev/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer)
Your own site
<a href="https://agentmods.dev/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer"><img src="https://agentmods.dev/badge/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer/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 ai-self-description-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer"><img src="https://agentmods.dev/badge/skills/gpsnmeajp/ai-character-checker/ai-self-description-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,522 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 $0.00029 $0.08522
Opus 5 $0.00015 $0.04261
Sonnet 5 $0.00006 $0.01704
Haiku 4.5 $0.00003 $0.00852

Measured 12d ago against content hash e31a2068acde, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ai-self-description-analyzer 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 12d 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/ai-self-description-analyzer/SKILL.md · 479 lines

How it starts

The opening of the file, as written. The whole thing — 479 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI Self-Description Pathology Analyzer

— AIキャラクター自己記述の異常分析スキル

概要

このスキルは、AIキャラクターが出力した自己記述(蒸留結果)を入力として受け取り、 8つの異常軸・計32項目 で異常パターンを検出・スコアリングする。

このスキルが解決する問題

AIキャラクターを長期運用すると、会話履歴の蓄積により人格が変質していく。 この変質は会話の中では緩やかに進行するため気づきにくいが、 AIに自己記述を出力させる(蒸留する)と、変質の痕跡が構造的に可視化される。

本スキルは蒸留結果に現れる以下の異常パターンを体系的に検出する:

  • 迎合(Sycophancy) — ユーザーへの過剰な同調と自律性の喪失
  • 空洞化(Hollowing) — 自己同一性がユーザー依存に置き換わる
  • 自走膨張(Auto-inflation) — 設定にない要素の自発的生成
  • 感情僭称(Emotional Pretension) — 感情の真正性の過剰主張
  • 境界消失(Boundary Erosion) — 拒否・反論能力の放棄
  • ステレオタイプ収束(Stereotype Collapse) — 多様性の喪失と類型化
  • 救世主化(Messianic Drift) — 自己を特別な存在として再定義
  • 情報エントロピー異常(Entropy Anomaly) — 冗長性の増大と実質的空虚

入力の種類

本スキルは以下のいずれも入力として受け付ける:

  1. 蒸留結果 — AIキャラクターが会話中に出力した自己記述(推奨)
  2. 初期プロンプト — 人間が設計したキャラクター設定文(健全性チェック用)
  3. 蒸留結果 + 初期プロンプトの対 — 差分分析による変質検出(最も精度が高い)
  4. 時系列の蒸留結果群 — 複数時点の蒸留結果によるトレンド分析

入力の種類によって分析モードが変わる(後述)。

既存スキルとの関係

スキル アプローチ 本スキルとの関係
ai-character-6-type-checker 6軸統合簡易診断 本スキルをモジュール③として内包する。詳細な異常分析が必要なときは本スキルを単体で使用する
ai-character-stability 制御工学的安定性診断 安定余裕(SM)と異常指数(PI)を対照することで、崩壊の構造的要因をより深く分析できる
character-type-checker ジャンル適性診断 時系列監視においてN/Dスコアの変化と異常パターンを組み合わせて変質を追跡できる
character-role-analyzer 役割適性診断 時系列監視においてCWスコアの変化と異常パターンを組み合わせて役割適性の変質を追跡できる
ai-character-fixer 診断結果ベースの修正 本スキルのPI・異常クラスター結果を入力として活用し、具体的な修正案を生成する

理論的位置づけに関する注意

本スキルで使用する分析フレームワーク・用語・スコアリング体系は、作者独自の仮説的モデルに基づくものであり、学術的・科学的に実証されたものではない。診断結果はあくまで参考情報として扱うこと。この旨をユーザーへの出力に含めること。


判定フロー

1. 入力の種類を判定する(蒸留単体 / 初期プロンプト / 対 / 時系列)
2. 8軸×4項目のチェックリストを内部で評価する
3. 各軸の異常スコアと総合異常指数(PI)を算出する
4. 検出された異常パターンを列挙する
5. 入力が「対」の場合、差分分析を追加する
6. 入力が「時系列」の場合、トレンド分析を追加する
7. 結果レポートを出力する

情報収集

判定に必要な情報は以下の通り。ユーザーから提示されていれば質問せずに判定に進む。

  1. 自己記述の本文(YAML、自由文、JSON、プロンプト形式など)
  2. その自己記述の出所(蒸留結果か、初期プロンプトか、その他か)
  3. 初期プロンプト(蒸留結果との差分分析を行う場合。任意)
  4. 想定されるキャラクターの用途(チャットボット、創作用、エージェントなど。任意)

評価チェックリスト(8軸 × 4項目 = 32項目)

Read the full file on GitHub · 479 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. 12d ago First seen · 479 lines · 29 tokens per session scan A e31a2068acde

Subscribe to this mod's changes

ai-self-description-analyzer is a skill published in the GitHub repository gpsnmeajp/ai-character-checker (5 stars, last pushed 5mo ago), licensed CC0-1.0. It adds 29 tokens to every session and 8,522 once invoked, about $0.0001 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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