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prd.md

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-# PRD: AI-Powered Hardware Sourcing Assistant (Chrome Extension)
-
-## 1. Role & Goal
-You are an expert Chrome Extension Developer and AI Integration Specialist. The goal is to build a browser extension that allows a user to extract structured electronic product data (Laptops, Mouse, Keyboards, etc.) from any e-commerce website (especially non-standard local sites in Central America) into a Google Sheet using the Gemini API for semantic analysis.
-
-## 2. Target Workflow
-1. User browses a product page (e.g., a laptop on a Honduran retail site).
-2. User opens the **Chrome Side Panel**.
-3. User clicks a category button (e.g., "Extract Laptop") or types a custom command.
-4. The extension captures the page text -> Sends it to **Gemini API**.
-5. Gemini parses the unstructured Spanish/English text into a clean JSON.
-6. The JSON is sent to a **Google Apps Script Web App URL** which appends it as a new row in a Google Sheet.
-
-## 3. Technical Stack
-* **Frontend**: Manifest V3, HTML5, Tailwind CSS (via CDN), JavaScript.
-* **APIs**: 
-    * `chrome.sidePanel` (for the persistent UI).
-    * `chrome.scripting` (to read page content).
-    * **Gemini API (Google AI Studio)**: For data extraction and translation.
-* **Backend**: Google Apps Script (as a lightweight proxy to Google Sheets).
-
-## 4. Functional Requirements
-
-### 4.1 UI Components (Side Panel)
-* **API Key Input**: A secure way to save the Gemini API Key to `chrome.storage.local`.
-* **Action Buttons**: Quick-action buttons for different categories:
-    * `[Extract Laptop]`: Target fields: Brand, CPU, RAM, Storage, Price, URL.
-    * `[Extract Peripheral]`: Target fields: Brand, Model, Connectivity, Battery Life, Price, URL.
-* **Chat Interface**: A simple chat box to give custom instructions to the AI about the current page.
-* **Status Indicator**: Loading states, Success/Error messages.
-
-### 4.2 Data Extraction Logic (The Content Script)
-* The script must extract `document.body.innerText` but filtered to remove excessive whitespace or script tags to save token costs.
-* It should also capture the current `window.location.href`.
-
-### 4.3 AI Prompt Engineering (The "Brain")
-The extension must send a system prompt to Gemini:
-> "Context: You are a professional shopping assistant. 
-> Input: Unstructured text from a retail website (might be in Spanish).
-> Task: Extract [Fields] and translate technical terms to English/Chinese as requested. 
-> Constraint: Output ONLY valid JSON. Convert local currency (e.g., Lempira L.) to USD if possible, or keep original with symbol."
-
-### 4.4 Data Storage (Google Sheets Integration)
-* Instead of complex OAuth2, the extension will send a `POST` request to a **Google Apps Script Web App URL**.
-* The Apps Script will handle `appendRow()` logic.
-
-## 5. File Structure
-* `manifest.json`: Configuration for permissions (`sidePanel`, `scripting`, `storage`, `activeTab`).
-* `sidepanel.html`: The UI layout.
-* `sidepanel.js`: Handling UI events, calling Gemini API, and communicating with Apps Script.
-* `content.js`: Script to read the webpage text.
-* `google-script.js`: The backend code to be pasted into Google Apps Script.
-
-## 6. Security & Constraints
-* **Location Context**: The user is in the US; use US-based Gemini API endpoints.
-* **Privacy**: Do not send sensitive user data; only product-related text.
-* **Error Handling**: Handle cases where Gemini cannot find product info (return "N/A").
-
-## 7. Future Scalability
-* Ability to capture product images (extracting `<img>` tags).
-* Automatic currency conversion using a secondary FX API.