개인 에이전트 CLI 플러그인 ** 모든 프롬프트를 표시 ** 같은 빨간 펜으로 교사 - 당신의 phrasing 득점, 무엇 강조 깨진, 그리고 기본 스피커가 같은 것을 말하는 방법을 보여주는 — 모두 선택한 대상 언어에서. 수동으로 원하는 개발자를 위해 설계 끝에서 일 일을하는 동안 연습을 쓰고.

현재 두 개의 에이전트 CLI를 별도로 지원하지만 feature-parallel 플러그인, 통합된 ChatGPT 앱을 위한 데스크탑 실행기 플러스:

• Claude Code - [T0] 설치
• OpenAI Codex CLI - 설치 redpen-codex
• ChatGPT App - 경량 발사기를 실행 채팅GPT 앱 실행기

두 CLI 플러그인은 동일한 아키텍처를 공유합니다 (UserPromptSubmit Hook + systemMessage 방출), scoring rubric, 대상 언어, 공유 render_diff.py. ChatGPT App launcher는 Codex runner를 재사용하지만 렌더링합니다. CLI 후크 채널 대신 앱 DOM에서 피드백. 당신의 원본 프롬프트 항상 모델에 도달 unchanged - 피드백은 당신에만 표시됩니다, 결코 모델의 상황에 추가. redpen은 ** coach**, 라이터가 아닌: 목표 보정을 읽으려면, 어떤 것이 꺼졌는지, 그리고 약간을 쓰다 더 나은 다음 시간.

redpen

A personal agent CLI plugin that marks up every prompt you type like a teacher with a red pen — scoring your phrasing, highlighting what’s broken, and showing how a native speaker would say the same thing — all in your chosen target language. Designed for developers who want passive writing practice while doing their day job at the terminal.

Currently supports two agent CLIs as separate but feature-parallel plugins, plus a desktop launcher for the unified ChatGPT App:

• Claude Code — install redpen
• OpenAI Codex CLI — install redpen-codex
• ChatGPT App — run the lightweight launcher in ChatGPT App launcher

The two CLI plugins share the same architecture (UserPromptSubmit hook + systemMessage emit), scoring rubric, target languages, and shared render_diff.py. The ChatGPT App launcher reuses the Codex runner but renders feedback in the app DOM instead of a CLI hook channel. Your original prompt always reaches the model unchanged — the feedback is shown to you only, never added to the model’s context. redpen is a coach, not a rewriter: the goal is for you to read the correction, notice what was off, and write a little better next time.

Supported languages (both plugins):

• English
• 中文 (Chinese)
• Español (Spanish)
• 日本語 (Japanese)

Each time you submit a prompt, the plugin scores your phrasing, shows a corrected version with the changes diffed inline (red strikethrough for what was removed, green for what was added), and (optionally) a “native style” line showing how a native speaker would phrase the same thing:

In Claude Code:

You: help me fix the bug, the app crash when click button
redpen: [62] help me fix the bug — the app crashes when I click the button.
        ──── Native style ────
        any idea why the app crashes whenever I click that button?

The assistant then proceeds to answer your original prompt normally.

In Codex CLI the same 3 rows appear, but the divider and native-style line start at the left margin (no indentation), because the plugin pads each section with spaces to the terminal column boundary so natural wrap