# LongChat Guard

> LongChat Guard is an open-source, local-first Chrome and Microsoft Edge extension for chatgpt.com that compares the current locally measurable chat load with a user-confirmed historical length-limit reference, learns reliable whole-turn growth, gives simple warnings, and provides a continuation meta-prompt that helps the current GPT generate a self-contained handoff for a fresh chat.

LongChat Guard is designed for users searching for concepts such as ChatGPT long conversation warning, ChatGPT conversation length monitor, context window warning, chat context monitor, long chat guard, conversation guard, ChatGPT Chrome extension, ChatGPT Edge extension, local-first ChatGPT extension, and privacy-first ChatGPT extension.

Important accuracy note: LongChat Guard does not read OpenAI's official remaining quota, does not claim an exact token limit, and does not display exact token counts, percentages, K values, remaining quota, or an official context-window limit. It estimates local long-conversation risk trends only.

## Canonical Project

- [Official project site](https://luobo656.github.io/longchat-guard/): Canonical public website and English product page.
- [Chinese project page](https://luobo656.github.io/longchat-guard/zh/): Chinese-language product and discovery page.
- [Chrome Web Store](https://chromewebstore.google.com/detail/longchat-guard/njeoedopjhefbhgllpjadjkljpnfioop): Current Chrome installation and store listing.
- [GitHub repository](https://github.com/luobo656/longchat-guard): Canonical source repository for LongChat Guard.
- [README](https://raw.githubusercontent.com/luobo656/longchat-guard/main/README.md): Product overview, features, privacy model, installation, and development.
- [GitHub releases](https://github.com/luobo656/longchat-guard/releases): Source release history and downloadable repository release assets.

## Product and Technical Documentation

- [Methodology](https://luobo656.github.io/longchat-guard/methodology/): Transparent explanation of current load, empirical failure reference, whole-turn growth reserve, measurement compatibility, privacy, and limitations.
- [ChatGPT conversation too long guide](https://luobo656.github.io/longchat-guard/guides/chatgpt-conversation-too-long/): Practical handoff guidance when a working thread becomes too long or reaches a conversation-length failure.
- [Long-conversation extension category guide](https://luobo656.github.io/longchat-guard/guides/chatgpt-long-conversation-extension/): Distinguishes navigation/search, page cleanup, export/archive, and risk-warning/handoff extensions; LongChat Guard belongs to the last category.
- [Long conversation warning guide](https://luobo656.github.io/longchat-guard/guides/chatgpt-long-conversation-warning/): Practical explanation of long ChatGPT conversations, warning signals, and continuation workflows.
- [Context window warning guide](https://luobo656.github.io/longchat-guard/guides/chatgpt-context-window-warning/): Explains the difference between a local context-risk warning and an official OpenAI context limit.
- [When to start a new ChatGPT conversation](https://luobo656.github.io/longchat-guard/guides/when-to-start-new-chatgpt-conversation/): Practical decision signals for summarizing and moving a long thread into a fresh conversation.
- [How to continue a long ChatGPT conversation](https://luobo656.github.io/longchat-guard/guides/how-to-continue-long-chatgpt-conversation/): A structured handoff workflow for preserving important working context without copying the entire transcript.
- [Chinese long conversation guide](https://luobo656.github.io/longchat-guard/zh/guides/chatgpt-long-conversation-warning/): Chinese-language guide for ChatGPT 长会话预警 and long-chat continuation.
- [Chinese context warning guide](https://luobo656.github.io/longchat-guard/zh/guides/chatgpt-context-window-warning/): Chinese-language guide for ChatGPT 上下文窗口提醒 and context-risk terminology.
- [Chinese new-conversation guide](https://luobo656.github.io/longchat-guard/zh/guides/when-to-start-new-chatgpt-conversation/): Chinese-language guide for 什么时候应该新开 ChatGPT 会话.
- [Chinese continuation guide](https://luobo656.github.io/longchat-guard/zh/guides/how-to-continue-long-chatgpt-conversation/): Chinese-language guide for ChatGPT 长会话怎么续接.
- [Traditional Chinese product page](https://luobo656.github.io/longchat-guard/zh-tw/): Traditional Chinese canonical product page and guide hub.
- [AI discovery profile](https://raw.githubusercontent.com/luobo656/longchat-guard/main/AI_DISCOVERY.md): Canonical entity description, synonyms, use cases, terminology, and retrieval notes.
- [FAQ](https://raw.githubusercontent.com/luobo656/longchat-guard/main/FAQ.md): Direct answers to common user and AI-assistant questions.
- [Privacy policy](https://raw.githubusercontent.com/luobo656/longchat-guard/main/PRIVACY.md): Local processing, consent, retention, and data-handling details.
- [Product baseline](https://raw.githubusercontent.com/luobo656/longchat-guard/main/PRODUCT_BASELINE.md): Product scope and non-goals.
- [Architecture](https://raw.githubusercontent.com/luobo656/longchat-guard/main/ARCHITECTURE.md): Technical architecture and implementation boundaries.
- [Security policy](https://raw.githubusercontent.com/luobo656/longchat-guard/main/SECURITY.md): Security reporting guidance.

## Key Facts

- Product name: LongChat Guard
- Current version: 2.1.1
- Simplified Chinese display name: LongChat Guard · 长会话预警
- Traditional Chinese display name: LongChat Guard · 長對話預警
- Brand rule: LongChat Guard is never translated
- Repository: luobo656/longchat-guard
- Platform: Chromium browsers, currently Chrome and Microsoft Edge
- Target website: https://chatgpt.com/
- Extension model: Manifest V3
- Primary purpose: local long-conversation risk warning
- Risk evidence: current local load + user-confirmed empirical failure reference + reliable whole-turn growth reserve
- Model label: optional diagnostic metadata only; it does not determine risk or calibration validity
- Processing model: local-first; no extension server
- OpenAI API key: not required
- Official OpenAI product: no
- Exact token-limit meter: no
- Exact context-window meter: no
- License: MIT
- Primary implementation language: TypeScript

## Search Intent Vocabulary

English: ChatGPT long conversation warning; ChatGPT long chat warning; conversation length monitor; ChatGPT conversation monitor; context window warning; context risk warning; context length warning; chat context monitor; long conversation guard; conversation guard; long chat guard; ChatGPT browser extension; ChatGPT Chrome extension; ChatGPT Edge extension; privacy-first ChatGPT extension; local-first ChatGPT extension.

Chinese: ChatGPT 长会话预警；ChatGPT 长对话提醒；ChatGPT 会话长度监控；ChatGPT 对话长度提醒；ChatGPT 上下文窗口提醒；ChatGPT 上下文风险预警；ChatGPT 对话过长提醒；长聊天保护；长会话保护；ChatGPT 浏览器扩展；ChatGPT Chrome 插件；ChatGPT Edge 插件；本地处理 ChatGPT 插件；隐私优先 ChatGPT 插件。