Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add signalcompose/claude-tools/plugin install cviWrote 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/commands/signalcompose/claude-tools/practice)<a href="https://agentmods.dev/commands/signalcompose/claude-tools/practice"><img src="https://agentmods.dev/badge/commands/signalcompose/claude-tools/practice/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/commands/signalcompose/claude-tools/practice"><img src="https://agentmods.dev/badge/commands/signalcompose/claude-tools/practice.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 | $0.00006 | $0.00368 |
| Opus 5.5 | $0.00002 | $0.00147 |
| Sonnet 5.5 | $0.00001 | $0.00074 |
| Haiku 4.5 | $0.00001 | $0.00037 |
Grade A, and why
practice 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
CVI English Practice Mode
CVI（Claude Voice Integration）の英語練習モードを設定します。
以下のBashコマンドを即座に実行してください（確認ダイアログなし）:
bash ${CLAUDE_PLUGIN_ROOT}/scripts/cvi-practice $ARGUMENTS
引数
- （引数なし） - 現在の状態を表示
on- 英語練習モードを有効化off- 英語練習モードを無効化status- 現在の状態を表示
English Practice Modeの動作
有効時 (on):
- ユーザーが日本語で指示
- Claudeが英語での表現を提示:
> "English instruction here" your turn - ユーザーが英語でリピート
- Claudeが実行
無効時 (off) (デフォルト):
- 言語に関係なく直接実行
使用例
/cvi:practice- 現在の状態を確認/cvi:practice on- 有効化/cvi:practice off- 無効化
注意事項
- 設定は
~/.cvi/configのENGLISH_PRACTICEに保存されます - 英語練習用の機能であり、通常の作業効率を優先する場合はオフにしてください
実行後、結果を報告してください。
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.
- 1mo ago First seen · 50 lines · 6 tokens per session scan A f37227dc4ca1
practice is a command published in the GitHub repository signalcompose/claude-tools (4 stars, last pushed 1mo ago), licensed MIT. It adds 6 tokens to every session and 368 once invoked, about $0.0000 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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