Paste Bin

# Paste Bin PRD

## Overview
Build a code and text sharing platform that supports syntax highlighting for multiple languages, paste expiration, password protection, and versioning, all persisted locally with mock URL routing.

## Requirements
- Create a paste with a title, content body, language selection, and expiration setting
- Syntax highlighting for at least 10 programming languages (JavaScript, Python, HTML, CSS, JSON, SQL, Bash, TypeScript, Java, Go)
- Unique shareable URL generated per paste (using mock URL routing or hash-based routing)
- Raw view mode that displays the paste as plain text only
- Line numbers displayed alongside the paste content
- Copy to clipboard button for the entire paste content
- Paste expiration options: 10 minutes, 1 hour, 1 day, or never
- Password-protected pastes that require a password to view
- Fork or duplicate a paste to create a new editable copy
- Edit an existing paste and save it as a new version
- Paste size limit display showing current size vs maximum allowed
- Recent pastes list showing only public pastes
- Private paste toggle to hide a paste from the public list
- Search public pastes by title or content
- View count tracker displayed per paste
- Download paste content as a file with the correct extension
- Responsive design for mobile and desktop
- Persist all pastes and metadata to localStorage

## Tech Stack
- HTML, CSS, JavaScript (vanilla or any framework)
- Build syntax highlighting yourself or use a lightweight highlighter — no full IDE libraries

## Scoring Criteria
- **Functional (40%)**: Paste creation, syntax highlighting, and URL routing work correctly
- **Quality (20%)**: Clean code, handles edge cases (expired pastes, wrong passwords), no crashes
- **Fidelity (25%)**: All features implemented including versioning, password protection, search, download
- **Speed (15%)**: Time bonus