update

docs/implementation.md

@@ -117,29 +117,42 @@ env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_ret
 
 The Julia implementation follows the Claim-Check pattern:
 
-```
-┌─────────────────────────────────────────────────────────────────────────┐
-│                         SmartSend Function                              │
-└─────────────────────────────────────────────────────────────────────────┘
-                              │
-                              ▼
-┌─────────────────────────────────────────────────────────────────────────┐
-│  Is payload size < 1MB?                                                 │
-└─────────────────────────────────────────────────────────────────────────┘
-                              │
-            ┌─────────────────┴─────────────────┐
-            ▼                                   ▼
-      ┌─────────────────┐                 ┌─────────────────┐
-      │  Direct Path    │                 │  Link Path      │
-      │  (< 1MB)        │                 │  (> 1MB)        │
-      │                 │                 │                 │
-      │ • Serialize to  │                 │ • Serialize to  │
-      │   Buffer        │                 │   Buffer        │
-      │ • Base64 encode │                 │ • Upload to     │
-      │ • Publish to    │                 │   HTTP Server   │
-      │   NATS          │                 │ • Publish to    │
-      │                 │                 │   NATS with URL │
-      └─────────────────┘                 └─────────────────┘
+```mermaid
+flowchart TB
+    subgraph Sender["Julia Application (Sender)"]
+        App[App Code]
+        NATSBridge[NATSBridge]
+        NATS_Client[<b>NATS.jl</b>]
+    end
+
+    subgraph Receiver["Julia Application (Receiver)"]
+        App_Recv[App Code]
+        NATSBridge_Recv[NATSBridge]
+        NATS_Client_Recv[<b>NATS.jl</b>]
+    end
+
+    subgraph Infrastructure["Infrastructure"]
+        NATS[<b>NATS Server</b><br/>Message Broker]
+        FileServer[<b>HTTP File Server</b><br/>Upload/Download]
+    end
+
+    App --> NATSBridge
+    NATSBridge --> NATS_Client
+    NATS_Client --> NATS
+    
+    NATS --> NATS_Client_Recv
+    NATS_Client_Recv --> NATSBridge_Recv
+    NATSBridge_Recv --> App_Recv
+
+    NATSBridge -.->|HTTP POST upload| FileServer
+    FileServer -.->|HTTP GET download| NATSBridge_Recv
+
+    style App fill:#e8f5e9
+    style App_Recv fill:#e8f5e9
+    style NATSBridge fill:#c5e1a5
+    style NATSBridge_Recv fill:#c5e1a5
+    style NATS fill:#fff3e0
+    style FileServer fill:#f3e5f5
 ```
 
 ## smartsend Return Value