Borrowing it
Nothing to install: this file belongs to xiaolai/claude-english-buddy-for-claude. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/xiaolai/claude-english-buddy-for-claude/main/CLAUDE.mdgit clone --depth 1 https://github.com/xiaolai/claude-english-buddy-for-claudeWrote 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/instructions/xiaolai/claude-english-buddy-for-claude/claude-md)<a href="https://agentmods.dev/instructions/xiaolai/claude-english-buddy-for-claude/claude-md"><img src="https://agentmods.dev/badge/instructions/xiaolai/claude-english-buddy-for-claude/claude-md/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/instructions/xiaolai/claude-english-buddy-for-claude/claude-md"><img src="https://agentmods.dev/badge/instructions/xiaolai/claude-english-buddy-for-claude/claude-md.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 | $0.00805 | $0.00805 |
| Opus 5 | $0.00402 | $0.00402 |
| Sonnet 5 | $0.00161 | $0.00161 |
| Haiku 4.5 | $0.00081 | $0.00081 |
Grade A, and why
claude-english-buddy-for-claude CLAUDE.md 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
claude-english-buddy
English language coach for non-native speakers using Claude Code. Auto-corrects prompts via UserPromptSubmit hook, tracks corrections, generates daily reports.
Prerequisites
- Node.js >= 18
- Run
npm installafter cloning the plugin to install dependencies before running tests or hooks.
Project structure
commands/
today.md /today — daily correction report with lessons
stats.md /stats — long-term trends and improvement
mistakes.md /mistakes — all-time recurring errors
config.md /config — configure settings
review.md /review — deep text review
preview.md /preview — dry-run correction preview
drill.md /drill — spot-quiz on top recurring mistakes
shared/
config-loader.md Shared partial — resolve merged config
jsonl-parser.md Shared partial — read JSONL history
format-report.md Shared partial — report output conventions
agents/
writing-reviewer.md Deep English text reviewer — orchestrator
grammar-checker.md Grammar and mechanics subagent
tone-calibrator.md Tone and register subagent
clarity-enhancer.md Clarity and phrasing subagent
skills/
claude-english-buddy/
writing-guide/ SKILL.md — meta-router to focused skills
grammar-fundamentals/ Grammar rules reference
punctuation-rules/ Punctuation rules reference
tone-calibration/ Tone and register guidance
technical-writing/ Conventions for dev-facing prose
common-non-native-mistakes/ Common L2-English error patterns
.claude/
rules/
01-voice-preservation.md Preserve author voice during corrections
02-minimal-invasiveness.md Only change text tied to an identified error
03-no-over-polishing.md Cap lessons per review; no cosmetic rewrites
hooks/
hooks.json UserPromptSubmit + SessionEnd hooks
scripts/
prompt-coach-hook.mjs Main hook — correct/translate/refine
session-end-hook.mjs Session summary on exit
lib/
detect.mjs Language detection (ASCII ratio heuristic)
state.mjs Correction history (JSONL per day)
stats.mjs Trend analysis and pattern extraction
tests/
detect.test.mjs Language detection tests
state.test.mjs State persistence tests
stats.test.mjs Stats computation tests
package.json Node.js project config
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.
- 3d ago First seen · 90 lines · 805 tokens per session scan A 1529adf5e3f7
claude-english-buddy-for-claude CLAUDE.md is an instructions file published in the GitHub repository xiaolai/claude-english-buddy-for-claude (29 stars, last pushed 18d ago), licensed ISC. It adds 805 tokens to every session, about $0.0040 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 2026-09-08.
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