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 agentmods add skills/sei-newbear/xp-harness/front-implementationnpx skills add sei-newbear/xp-harness --skill front-implementationgit clone --depth 1 https://github.com/sei-newbear/xp-harnessWhat 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 | $0.00073 | $0.00250 |
| Opus 5 | $0.00036 | $0.00125 |
| Sonnet 5 | $0.00015 | $0.00050 |
| Haiku 4.5 | $0.00007 | $0.00025 |
Grade A, and why
front-implementation 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 2d 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
front の実装規約
- コンポーネントは関数コンポーネントのみ。ファイル名・コンポーネント名は PascalCase
- 型定義は
interfaceを使う（typeエイリアスは使わない） - export は named export のみ（default export は使わない。Vite のエントリポイント等、ツールが要求する場合だけ例外）
- コメントは書かない。名前とコードで意図を伝える
- 状態管理は React hooks のみ（外部状態管理ライブラリを入れない）
- API 呼び出しは
front/src/api/配下の client 関数に集約する（コンポーネントから fetch を直接呼ばない）
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.
- 2d ago First seen · 13 lines · 73 tokens per session scan A dd80ceef95ce
front-implementation is a skill published in the GitHub repository sei-newbear/xp-harness (9 stars, last pushed 25d ago), licensed MIT. It adds 73 tokens to every session and 250 once invoked, about $0.0004 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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