docs: rename Business Agent to Cymbal Retail Agent

README.md

@@ -49,6 +49,16 @@ Zod.
     *   Demonstrates implementation of UCP specifications for shopping,
         checkout, and order management using a Node.js stack.
 
+### A2A (Agent-to-Agent)
+
+An AI-powered retail agent implementing UCP via the A2A protocol.
+
+*   **Cymbal Retail Agent**: [Documentation](a2a/README.md)
+    *   Located in `a2a/business_agent/`.
+    *   Demonstrates A2A protocol integration with UCP Extension.
+    *   Includes AI-powered shopping assistant with Google ADK and Gemini.
+    *   React-based chat client for user interaction.
+
 ## Getting Started
 
 Please refer to the specific README files linked above for detailed instructions

a2a/README.md

@@ -14,7 +14,7 @@
    limitations under the License.
 -->
 
-# A2A Business Agent with UCP Extension
+# Cymbal Retail Agent with UCP Extension and A2A
 
 This sample demonstrates how to build an AI-powered shopping assistant using **[Universal Commerce Protocol (UCP)](https://ucp.dev)** - an open standard that enables interoperability between commerce platforms, merchants, and payment providers.
 
@@ -48,14 +48,14 @@ The sample uses **[Google ADK](https://google.github.io/adk-docs/)** (Agent Deve
 
 <p align="center">
 <b>System Architecture</b><br/>
-<i>How Client, A2A Protocol, Business Agent, and Store interact</i>
+<i>How Client, A2A Protocol, Cymbal Retail Agent, and Store interact</i>
 <br/><br/>
 <img src="assets/architecture_diagram.jpeg" alt="Architecture Diagram" width="900" />
 </p>
 
 **Key points:**
 - **Client** sends requests with `UCP-Agent` header containing its profile URL
-- **Business Agent** serves both `/.well-known/agent-card.json` (A2A) and `/.well-known/ucp` (UCP Profile)
+- **Cymbal Retail Agent** serves both `/.well-known/agent-card.json` (A2A) and `/.well-known/ucp` (UCP Profile)
 - **Capability Negotiation** happens before processing - agent and client agree on supported features
 - **RetailStore** uses UCP SDK types internally for checkout, fulfillment, and payment data
 
@@ -71,7 +71,7 @@ Before you begin, ensure you have:
 - [ ] Node.js 18+
 - [ ] [Gemini API Key](https://aistudio.google.com/apikey)
 
-### 1. Start the Business Agent
+### 1. Start the Cymbal Retail Agent
 
 ```bash
 cd a2a/business_agent
@@ -91,7 +91,7 @@ INFO:     Started server process
 INFO:     Uvicorn running on http://0.0.0.0:10999
 ```
 
-This starts the business agent on port 10999. You can verify by accessing:
+This starts the Cymbal Retail Agent on port 10999. You can verify by accessing:
 - **Agent Card:** http://localhost:10999/.well-known/agent-card.json
 - **UCP Profile:** http://localhost:10999/.well-known/ucp
 
@@ -179,7 +179,7 @@ This sample uses the following UCP capabilities:
 
 ## Components
 
-### Business Agent (`business_agent/`)
+### Cymbal Retail Agent (`business_agent/`)
 
 AI shopping assistant built with Google ADK, exposed via A2A interface with UCP extension.
 
@@ -202,7 +202,7 @@ React UI (TypeScript, Vite, Tailwind) that communicates via A2A and renders UCP
 
 ## Mock Store
 
-The business agent uses an in-memory `RetailStore` to simulate a real backend:
+The Cymbal Retail Agent uses an in-memory `RetailStore` to simulate a real backend:
 
 - **Products** - Loaded from `data/products.json` (cookies, chips, fruits, etc.)
 - **Checkouts** - Session-based checkout management with line items

a2a/business_agent/README.md

@@ -14,7 +14,7 @@
    limitations under the License.
 -->
 
-# Example Business Agent
+# Cymbal Retail Agent
 
 Example agent implementing A2A Extension for UCP
 
@@ -29,5 +29,5 @@ Example agent implementing A2A Extension for UCP
 1. Run `uv sync`
 2. Copy env.example to .env and update it with relevant Gemini API key.
 3. Run `uv run business_agent`
-4. This starts the business agent on port 10999. You can verify by accessing
+4. This starts the Cymbal Retail Agent on port 10999. You can verify by accessing
 the agent card at http://localhost:10999/.well-known/agent-card.json