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+<!-- ©AngelaMos | 2026 -->
+<!-- DEMO.md -->
+
+<div align="center">
+
+```ruby
+███████╗███╗   ██╗ ██████╗██████╗ ██╗   ██╗██████╗ ████████╗███████╗██████╗
+██╔════╝████╗  ██║██╔════╝██╔══██╗╚██╗ ██╔╝██╔══██╗╚══██╔══╝██╔════╝██╔══██╗
+█████╗  ██╔██╗ ██║██║     ██████╔╝ ╚████╔╝ ██████╔╝   ██║   █████╗  ██║  ██║
+██╔══╝  ██║╚██╗██║██║     ██╔══██╗  ╚██╔╝  ██╔═══╝    ██║   ██╔══╝  ██║  ██║
+███████╗██║ ╚████║╚██████╗██║  ██║   ██║   ██║        ██║   ███████╗██████╔╝
+╚══════╝╚═╝  ╚═══╝ ╚═════╝╚═╝  ╚═╝   ╚═╝   ╚═╝        ╚═╝   ╚══════╝╚═════╝
+```
+
+**Demo & Preview**
+
+<br>
+
+<a href="https://chat.carterperez-dev.com">
+  <img src="https://img.shields.io/badge/▶_TRY_IT_LIVE-chat.carterperez--dev.com-DC143C?style=for-the-badge&logo=googlechrome&logoColor=white" alt="Live Demo"/>
+</a>
+
+<br>
+
+```ruby
+docker compose up -d    →    https://localhost
+```
+
+<br>
+
+[Register](#register) · [Login](#login) · [New Conversation](#new-conversation) · [Empty Conversation](#empty-conversation) · [First Message](#first-message) · [Encrypted Messaging](#encrypted-messaging) · [Mobile View](#mobile-view)
+
+</div>
+
+---
+
+### Register
+
+Passwordless account creation with WebAuthn passkey enrollment — username and display name are the only fields, no password is ever entered or stored
+
+![Register](assets/images/register.png)
+
+---
+
+### Login
+
+Passkey authentication with optional username field — leave blank to use a discoverable credential resolved by the authenticator
+
+![Login](assets/images/login.png)
+
+---
+
+### New Conversation
+
+Username search resolves the recipient's identity key from the directory before any message is composed
+
+![New Conversation](assets/images/new-conversation.png)
+
+---
+
+### Empty Conversation
+
+Fresh thread with E2EE badge and presence indicator — no plaintext history is ever stored on the server, so a new conversation truly starts empty
+
+![Empty Conversation](assets/images/empty-conversation.png)
+
+---
+
+### First Message
+
+Outbound message encrypted client-side with the recipient's public key and pushed over WebSocket — the server only ever sees ciphertext
+
+![First Message](assets/images/first-message.png)
+
+---
+
+### Encrypted Messaging
+
+Live two-way conversation with delivery timestamps and the lock indicator on every bubble confirming end-to-end encryption per message
+
+![Encrypted Messaging](assets/images/chat.png)
+
+---
+
+### Mobile View
+
+Responsive single-pane layout with collapsible sidebar — passkey auth and E2EE work identically on mobile via the platform authenticator
+
+![Mobile View](assets/images/mobile.png)
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