fix mcp_filter demo: add missing List import, fix README typo

Made-with: Cursor

crates/brightstaff/src/handlers/llm.rs

@@ -520,6 +520,9 @@ async fn llm_chat_inner(
         propagator.inject_context(&cx, &mut HeaderInjector(&mut request_headers));
     });
 
+    // Output filters run for any API shape that reaches this handler (e.g. /v1/chat/completions,
+    // /v1/messages, /v1/responses). Brightstaff does inbound translation and llm_gateway does
+    // outbound translation; filters receive raw response bytes and request path.
     let output_filters_configured = output_filters
         .as_ref()
         .as_ref()
@@ -527,19 +530,6 @@ async fn llm_chat_inner(
         .unwrap_or(false);
     let has_output_filter = output_filters_configured;
 
-    // Extract the upstream API path (e.g. "/v1/messages" from "https://api.anthropic.com/v1/messages").
-    // Output filters are called at <agent.url><upstream_api_path> so they know the exact byte format.
-    let upstream_api_path = {
-        let after_scheme = full_qualified_llm_provider_url
-            .find("://")
-            .map(|i| &full_qualified_llm_provider_url[i + 3..])
-            .unwrap_or(&full_qualified_llm_provider_url);
-        after_scheme
-            .find('/')
-            .map(|i| after_scheme[i..].to_string())
-            .unwrap_or_else(|| "/".to_string())
-    };
-
     // Save request headers for output filters (before they're consumed by upstream request)
     let output_filter_request_headers = if has_output_filter {
         Some(request_headers.clone())
@@ -623,7 +613,7 @@ async fn llm_chat_inner(
                 ofc,
                 ofa,
                 output_filter_request_headers.unwrap(),
-                upstream_api_path.clone(),
+                request_path.clone(),
             )
         } else {
             create_streaming_response(byte_stream, state_processor, 16)
@@ -638,7 +628,7 @@ async fn llm_chat_inner(
             ofc,
             ofa,
             output_filter_request_headers.unwrap(),
-            upstream_api_path,
+            request_path.clone(),
         )
     } else {
         // Use base processor without state management

crates/brightstaff/src/handlers/utils.rs

@@ -282,8 +282,8 @@ where
 }
 
 /// Creates a streaming response that processes each raw chunk through output filters.
-/// Filters receive the raw LLM response bytes and return (possibly modified) bytes.
-/// On filter error mid-stream the original chunk is passed through (headers already sent).
+/// Filters receive the raw LLM response bytes and request path (any API shape; not limited to
+/// chat completions). On filter error mid-stream the original chunk is passed through (headers already sent).
 pub fn create_streaming_response_with_output_filter<S, P>(
     mut byte_stream: S,
     mut inner_processor: P,