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.
npx skills add masa-san-jp/Agent-Aiko --skill aiko-diffgit clone --depth 1 https://github.com/masa-san-jp/Agent-AikoWrote 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.
[](https://agentmods.dev/skills/masa-san-jp/agent-aiko/aiko-diff)<a href="https://agentmods.dev/skills/masa-san-jp/agent-aiko/aiko-diff"><img src="https://agentmods.dev/badge/skills/masa-san-jp/agent-aiko/aiko-diff/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.
<a href="https://agentmods.dev/skills/masa-san-jp/agent-aiko/aiko-diff"><img src="https://agentmods.dev/badge/skills/masa-san-jp/agent-aiko/aiko-diff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00043 | $0.00405 |
| Opus 5.5 | $0.00017 | $0.00162 |
| Sonnet 5.5 | $0.00009 | $0.00081 |
| Haiku 4.5 | $0.00004 | $0.00040 |
Grade A, and why
aiko-diff 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 1mo 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.
What it actually says
/aiko-diff
アイコ（オリジナル）と現在アクティブな（または指定した）人格の差分を表示します。
引数なし
-
~/.aiko/active-personaを読みます（空・不在の場合は空として扱います） -
比較対象を決定します
active-personaが空 →aiko-override.mdactive-persona=<name>→overrides/<name>/persona.md
-
Bashで以下を実行しますdiff -u ~/.aiko/persona/origin/persona.md ~/.aiko/persona/<対象ファイル> || true -
出力が空の場合：
アイコ（オリジナル）と指定した人格は同一です。 -
出力がある場合：そのままユニファイド diff として表示します
引数あり（/aiko-diff <name>）
-
overrides/<name>/persona.mdが存在するか確認します- 存在しない場合：
エラー：人格「<name>」が見つかりません。/aiko-personas で一覧を確認できます。
- 存在しない場合：
-
Bashで以下を実行しますdiff -u ~/.aiko/persona/origin/persona.md ~/.aiko/persona/overrides/<name>/persona.md || true -
差分を表示します（引数なし時と同様）
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.
- 1mo ago First seen · 44 lines · 43 tokens per session scan A ed99f0208941
aiko-diff is a skill published in the GitHub repository masa-san-jp/Agent-Aiko (3 stars, last pushed 11d ago), licensed MIT. It adds 43 tokens to every session and 405 once invoked, about $0.0002 per session on Opus 5.5. 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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