Active, AI Helper & Second Brain

A Chrome extension built to solve three problems:

1. Websites that pause or log you out when you switch tabs.
2. Needing quick AI explanations without leaving your current context.
3. Forgetting what you read—this extension lets you save snippets to a local "Second Brain" that the AI references later.

This extension provides an advanced "Always Active" spoofer, an on-demand AI assistant powered by Gemini 3 Flash, and a local Vector Database for long-term memory.

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🚀 Key Features

🧠 Second Brain (New!)

• Save to Memory: Highlight any text and click "Save to Brain" on the floating toolbar.
• Context-Aware Recall: When you ask a question later, the AI automatically searches your saved notes for relevant information and uses it to answer you.
• Privacy First: All your notes are stored locally in your browser (IndexedDB) and are never sent to a cloud server (except briefly to Google for embedding generation).

🤖 Advanced AI Helper

• Floating Toolbar: Automatically appears when you select text, giving you quick options to Ask AI or Save.
• Multi-Turn Chat: Don't just get one answer—ask follow-up questions in the input box at the bottom of the window.
• Markdown Support: Responses are beautifully formatted with bold text, code blocks, and lists.
• Smart Context: Sends the page content + your relevant saved memories to the AI for the best possible answer.

👁️ "Always Active" Pro

• Visibility Spoofing: Overrides document.visibilityState and document.hidden.
• Focus Guard: Now intercepts window.onblur events, making websites think the window is always focused, even when you are using a different app.

⚙️ Full Customization

• Memory Manager: View and delete your saved notes in the Options page.
• Theming: Customize the AI window's background color, text color, and transparency.
• Resizing: Set default window dimensions or resize the floating window on the fly.

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📥 Installation

Since this extension is a developer preview, you must install it manually:

1. Download or clone this repository to your local machine.
2. Open Google Chrome and navigate to chrome://extensions.
3. Enable "Developer mode" (toggle in top-right).
4. Click "Load unpacked".
5. Select the folder containing this project.

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📖 How to Use

1. Set Your API Key (Required)

The AI features require a Google Gemini API Key.

1. Click the extension icon -> "Open Settings".
2. Enter your key in the Gemini API Key field. (Get one for free at Google AI Studio).
3. Click "Save".

2. The Floating Toolbar

1. Highlight text on any webpage.
2. A small toolbar will appear above your selection:
   • 🤖 Ask AI: Opens the chat window with your question.
   • 🧠 Save to Brain: Saves the snippet to your local database.

3. Chatting & Follow-up

• After the AI answers, type in the input box at the bottom to ask a follow-up question.
• The AI remembers the conversation context within that window session.

4. Managing Your "Second Brain"

1. Go to the Options Page.
2. Scroll down to "Second Brain Memory".
3. You will see a list of all saved snippets.
4. Click the Delete (🗑️) button to remove old notes.

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🛠️ Built With

• Google Gemini 3 Flash Preview (Generation)
• Text-Embedding-004 (Vector Embeddings)
• IndexedDB (Local Vector Database)
• Cosine Similarity (Custom Vector Search Algorithm)
• Chrome Extension Manifest V3