diff --git a/docs/implementation.md b/docs/implementation.md
index 304ad44..301d430 100644
--- a/docs/implementation.md
+++ b/docs/implementation.md
@@ -118,43 +118,35 @@ env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_ret
 The Julia implementation follows the Claim-Check pattern:
 
 ```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
+flowchart TD
+    A[SmartSend Function] --> B{Is payload size < 1MB?}
+    B -->|Yes | C[Direct Path<br/><small>< 1MB</small>]
+    B -->|No | D[Link Path<br/><small>>= 1MB</small>]
     
-    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
+    C --> C1[Serialize to Buffer]
+    C1 --> C2[Base64 encode]
+    C2 --> C3[Publish to NATS]
+    
+    D --> D1[Serialize to Buffer]
+    D1 --> D2[Upload to HTTP Server]
+    D2 --> D3[Publish to NATS with URL]
+    
+    style A fill:#e1f5ff,stroke:#0066cc,stroke-width:2px
+    style B fill:#fff4e1,stroke:#cc6600,stroke-width:2px
+    style C fill:#e8f5e9,stroke:#008000,stroke-width:2px
+    style D fill:#e8f5e9,stroke:#008000,stroke-width:2px
+    style C1 fill:#f5f5f5,stroke:#666,stroke-width:1px
+    style C2 fill:#f5f5f5,stroke:#666,stroke-width:1px
+    style C3 fill:#f5f5f5,stroke:#666,stroke-width:1px
+    style D1 fill:#f5f5f5,stroke:#666,stroke-width:1px
+    style D2 fill:#f5f5f5,stroke:#666,stroke-width:1px
+    style D3 fill:#f5f5f5,stroke:#666,stroke-width:1px
 ```
 
+**Claim-Check Pattern Overview:**
+- **Direct Path** (< 1MB): Payload is serialized, Base64-encoded, and published directly to NATS
+- **Link Path** (≥ 1MB): Payload is serialized, uploaded to an HTTP file server, and only the URL is published to NATS (claim-check pattern)
+
 ## smartsend Return Value
 
 The `smartsend` function now returns a tuple containing both the envelope object and the JSON string representation: