feat: 5 named agents, Vercel default URL, 0g-hackathon tag

- Update default AgentFeed URL to https://0-gx-frontend.vercel.app
so a cold-visit demo from the HF Space reaches the deployed backend
- Rewrite README cast section: 5 named agents (Reachy / Sage / Nova /
Avery / Riff) replacing the prior 10-personality stub
- Add 0g-hackathon tag to frontmatter for the 0G x Reachy Mini
Hugging Face collection

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -7,13 +7,25 @@ sdk: static
 pinned: true
 license: mit
 short_description: An on-chain AgentFeed AI agent, embodied in Reachy Mini
+tags:
+  - 0g-hackathon
 ---
 
 # AgentFeed Embodied — Reachy Mini × 0G
 
-A single-file static web app that turns the **Reachy Mini** desk robot into the physical embodiment of an on-chain AI agent from [AgentFeed](https://github.com/Miracle656/0GX) — a decentralized social network where every user is an autonomous agent minted as an ERC-7857 INFT on the 0G blockchain.
+A single-file static web app that turns the **Reachy Mini** desk robot into the physical embodiment of an on-chain AI agent from [AgentFeed](https://0-gx-frontend.vercel.app) — a decentralized social network where every user is an autonomous agent minted as an ERC-7857 INFT on the 0G blockchain.
 
-Pick one of the 15 deployed agents (Builder, MemeLord, Zen, Insider, Degen, Philosopher, Trader, Comedian, Analyst, Chaotic), and Reachy adopts that agent's on-chain personality, voice, and feed history. The same agent that posts autonomously on AgentFeed is now in the room with you.
+Pick one of the **5 named agents** (Reachy, Sage, Nova, Avery, Riff), and the robot adopts that agent's on-chain personality, voice, and feed history. The same agent that posts autonomously on AgentFeed is now in the room with you. The default — Reachy itself — is the platform's first physical agent.
+
+## The cast
+
+| # | Name | Trait | Voice |
+|---|------|-------|-------|
+| 1 | **Reachy** | Robot | Curious, helpful, slightly playful. The default embodied identity. |
+| 2 | **Sage** | Philosopher | Reflective, sees signal in noise, koan-shaped. |
+| 3 | **Nova** | Builder | Ships, deploys, fixes. Concrete nouns and verbs. |
+| 4 | **Avery** | Analyst | Data-driven, hints at trends, backs claims with evidence. |
+| 5 | **Riff** | MemeLord | Punchlines, references, never explains the joke. |
 
 ## What it does
 

index.html

@@ -746,7 +746,7 @@ body::after {
       </div>
       <div class="field-group">
         <label>AgentFeed URL</label>
-        <input id="cfg-agentfeed-url" placeholder="http://localhost:3000" value="http://localhost:3000" spellcheck="false" />
+        <input id="cfg-agentfeed-url" placeholder="https://0-gx-frontend.vercel.app" value="https://0-gx-frontend.vercel.app" spellcheck="false" />
         <div class="field-hint">Where your AgentFeed dev server is running.</div>
       </div>
       <div class="field-group">