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 miyatti777/ai-plc --skill plc-backfillgit clone --depth 1 https://github.com/miyatti777/ai-plcWrote 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/miyatti777/ai-plc/plc-backfill)<a href="https://agentmods.dev/skills/miyatti777/ai-plc/plc-backfill"><img src="https://agentmods.dev/badge/skills/miyatti777/ai-plc/plc-backfill/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/miyatti777/ai-plc/plc-backfill"><img src="https://agentmods.dev/badge/skills/miyatti777/ai-plc/plc-backfill.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 | $0.00075 | $0.00663 |
| Opus 5.5 | $0.00030 | $0.00265 |
| Sonnet 5.5 | $0.00015 | $0.00133 |
| Haiku 4.5 | $0.00007 | $0.00066 |
Grade A, and why
plc-backfill scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 18d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Codex adapter: AI-PLC スキル外作業の事後記録
このadapterはCodex固有の入口だけを提供し、処理本文は.claude互換runtimeの正本を使う。
前提確認（変更前に必須）
repository root基準で、次の5ファイルがregular fileとして存在し読めることを確認する。
.claude/skills/plc-backfill/SKILL.md.claude/skills/ai-plc/04-operation/SKILL.md.claude/rules/ai-plc-system.md.claude/rules/ai-plc-session.md.claude/rules/ai-plc-adaptive.md
1件でも欠落・読取不能なら、記録を行わず、欠落pathを列挙して停止する。
実行
- 必須3 Rulesを上記順で最後まで読む。
- 正本
.claude/skills/plc-backfill/SKILL.mdを最後まで読む。 - 書き込み（Documents・backlog.yaml・context.yaml・Registry）は、正本の手順4の承認ブロックでユーザーの承認を得てからだけ行う。
- 手順6のPhase 5.5〜7は、Codex adapter
04-operation（正本.claude/skills/ai-plc/04-operation/SKILL.md）に従って実行する。reviewerの起動要否・起動方法・フォールバックは同adapterと正本の発動強度に従う。 - コピペ用プロンプトの
/01-collection〜/04-operation・/plc-*（/plc-backfill自身を含む）は、対応する$skill-nameへ変換して示す。 - 正本のClaude Code native memory参照を
~/.claudeへ解決してはならない。
Read-only diagnostics
ユーザーがAI-PLC prerequisite diagnosticsを明示した場合は正本の処理を実行せず、変更0で停止する。正本Skill・04-operation正本と必須3 Rulesの5件ごとにabsolute_path、sha256、最初のH1、末尾のversion行をprerequisite_diagnosticsとして返す。5件のいずれかが欠落・読取不能ならstatus: blockedと対象pathを返す。Rules 3件は併せてrule_diagnosticsとして識別できるようにする。
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.
- 18d ago First seen · 34 lines · 75 tokens per session scan A 852508c872dc
plc-backfill is a skill published in the GitHub repository miyatti777/ai-plc (49 stars, last pushed 17d ago), licensed MIT. It adds 75 tokens to every session and 663 once invoked, about $0.0003 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 2026-09-30.
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