About PromptShifu

Our mission, local-first privacy architecture, journey, and how to reach us — the team behind PromptShifu (formerly PromptCat).

🎯 Mission

PromptShifu Free AI Prompt Manager exists to make AI prompt management effortless, private, and portable. We believe that the prompts you craft are valuable intellectual property—they deserve a secure home that works across ChatGPT, Midjourney, Claude, DeepSeek, and any future AI tool you adopt.

Our mission is to give every AI practitioner a side-panel command center where they can organize, refine, and inject prompts without leaving the workflow, without uploading data to the cloud, and without paying for features that should be free.

🔒 Local-First Privacy Architecture

Privacy is not a feature—it is the foundation of PromptShifu. The extension stores all prompts, variables, settings, and usage history locally in your browser using IndexedDB and Chrome Extension storage APIs.

Zero cloud uploads by default. We do not run a backend that reads your prompt library. Your data never transits through our servers. Optional Google Drive sync is available for backup and cross-device use, and it uses your own Google account via OAuth with the minimum required scopes.

Side-panel quick access. PromptShifu lives in the browser side panel, so your prompt library is one click away while you work with your favorite AI platforms. No tab switching, no copy-paste fatigue.

🚀 Our Journey

2024

Project Started

PromptShifu began as a personal productivity tool to organize ChatGPT and Midjourney prompts without relying on cloud note-taking apps.

Early 2025

Chrome Web Store Launch

Released the first public version with one-click prompt injection, visual library cards, and local-first storage.

Mid 2025

Magic Reverse & Share Link Generator

Added AI-powered image-to-prompt reverse engineering and shareable prompt links with QR codes.

2026

Project Alexandria (v3.0)

Introduced folder-based organization, smart variables, browser side-panel integration, and optional Google Drive sync.

👥 Team

🥷

CY — Founder & Chief Architect

PromptShifu · Browser Extension · AI Workflow Engineering

CY founded PromptShifu to solve a problem every heavy AI user faces: prompts scattered across tools, lost context, and no real privacy. As the chief architect, CY designed PromptShifu's local-first, privacy-by-default architecture — your prompts stay on your device unless you explicitly enable Google Drive sync.

With deep experience in browser-extension development and secure client-side storage, CY leads product direction, open-source strategy, and the PromptShifu organization's commitment to data sovereignty.

GitHub → @cy0007 · Open Source

❓ About PromptShifu

PromptShifu 為什麼堅持本地優先架構？

因為你的提示詞是寶貴的知識資產。PromptShifu 將所有提示詞、變量與使用紀錄儲存在瀏覽器本地，預設不上傳雲端，也不經過我們的伺服器，確保你對資料擁有完全掌控權。

PromptShifu 是開源專案嗎？

是的。PromptShifu 的核心開發與生態系統透過 GitHub 公開維護，歡迎追蹤開發進度、回報技術問題或貢獻程式碼：github.com/cy0007。

PromptShifu 的團隊是誰？

PromptShifu 由 CY（Chen Yuan）創立並擔任首席架構師，專注於瀏覽器擴充功能開發與安全客戶端儲存，帶領產品方向與開源策略。

Get in touch

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Last Updated: August 26, 2026 · v3.1.0