From bf36fa76529d729034421466bd067d30e502f96d Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Fri, 23 Jan 2026 19:16:47 +0000
Subject: [PATCH] docs: add extra operations to mermaid diagram

Co-authored-by: ishaan <ishaan@berri.ai>
---
 .../docs/pass_through/architecture.md         | 23 +++++++++++++------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/docs/my-website/docs/pass_through/architecture.md b/docs/my-website/docs/pass_through/architecture.md
index 840f2d3e766..16e8377a3f9 100644
--- a/docs/my-website/docs/pass_through/architecture.md
+++ b/docs/my-website/docs/pass_through/architecture.md
@@ -16,23 +16,33 @@ sequenceDiagram
     
     rect rgb(240, 240, 240)
         Note over Proxy: 1. URL Construction
-        Note over Proxy: Build: https://us-central1-aiplatform.googleapis.com/...
+        Note over Proxy: Build regional/provider-specific URL
     end
     
     rect rgb(240, 240, 240)
         Note over Proxy: 2. Auth Header Replacement
-        Note over Proxy: Replace litellm key → provider credentials
+        Note over Proxy: LiteLLM key → provider credentials
+    end
+
+    rect rgb(240, 240, 240)
+        Note over Proxy: 3. Extra Operations
+        Note over Proxy: • x-pass-* headers (strip prefix, forward)
+        Note over Proxy: • x-litellm-tags → metadata
+        Note over Proxy: • Guardrails (opt-in)
+        Note over Proxy: • Multipart form reconstruction
     end
     
     Proxy->>Provider: POST https://us-central1-aiplatform.googleapis.com/...
     Note over Proxy,Provider: Headers: Authorization: Bearer ya29.google-oauth...
     Note over Proxy,Provider: Body: { "contents": [...] } ← UNCHANGED
     
-    Provider-->>Proxy: Response
-    
+    Provider-->>Proxy: Response (streaming or non-streaming)
+
     rect rgb(240, 240, 240)
-        Note over Proxy: 3. Logging (async, optional)
-        Note over Proxy: Parse response → calculate cost → log
+        Note over Proxy: 4. Response Handling (async)
+        Note over Proxy: • Collect streaming chunks for logging
+        Note over Proxy: • Cost injection (if enabled)
+        Note over Proxy: • Parse response → calculate cost → log
     end
     
     Proxy-->>Client: Response (unchanged)
@@ -42,7 +52,6 @@ sequenceDiagram
 
 - **URL Construction** - Build correct provider URL (e.g., regional endpoints for Vertex AI, Bedrock)
 - **Auth Header Replacement** - Swap LiteLLM virtual key for actual provider credentials
-- **Logging** (optional) - Parse response to extract usage and calculate cost
 
 ## Extra Operations