diff --git a/README.md b/README.md
index 8392253..fd3c67d 100644
--- a/README.md
+++ b/README.md
@@ -88,8 +88,6 @@ Start the gateway with default settings:
 | `-socks` | `""` | SOCKS5 proxy URL (e.g. `socks5://127.0.0.1:1080`) |
 | `-user-agent` | *(Chrome UA)* | Custom User-Agent string |
 
-*(Note: legacy flags `-browser`, `-xvfb`, and `-headless` are retained for backward compatibility but are ignored, as groqqer operates completely headless via direct WebSocket).*
-
 ## API usage examples
 
 ### 1. List available models
diff --git a/bin/groqqer b/bin/groqqer
index 210e75a..91dd79e 100755
Binary files a/bin/groqqer and b/bin/groqqer differ
diff --git a/groqqer.go b/groqqer.go
index 4796d6f..bc036a7 100644
--- a/groqqer.go
+++ b/groqqer.go
@@ -107,14 +107,11 @@ func (m *ChatMessage) GetContentString() string {
 }
 
 type ChatCompletionRequest struct {
-  Model               string        `json:"model"`
-  Messages            []ChatMessage `json:"messages"`
-  Tools               []Tool        `json:"tools,omitempty"`
-  ToolChoice          interface{}   `json:"tool_choice,omitempty"`
-  Stream              bool          `json:"stream"`
-  MaxTokens           int           `json:"max_tokens"`
-  MaxCompletionTokens int           `json:"max_completion_tokens"`
-  ReasoningEffort     string        `json:"reasoning_effort,omitempty"`
+  Model      string        `json:"model"`
+  Messages   []ChatMessage `json:"messages"`
+  Tools      []Tool        `json:"tools,omitempty"`
+  ToolChoice interface{}   `json:"tool_choice,omitempty"`
+  Stream     bool          `json:"stream"`
 }
 
 type ChatCompletionResponseChoice struct {
@@ -1609,12 +1606,8 @@ func parseToolCallsFromText(input string) ([]ToolCall, bool) {
 
 func parseXMLToolCall(block string) ([]ToolCall, bool) {
   inner := strings.TrimSpace(block)
-  if strings.HasPrefix(inner, "<tool_call>") {
-    inner = strings.TrimPrefix(inner, "<tool_call>")
-  }
-  if strings.HasSuffix(inner, "</tool_call>") {
-    inner = strings.TrimSuffix(inner, "</tool_call>")
-  }
+  inner = strings.TrimPrefix(inner, "<tool_call>")
+  inner = strings.TrimSuffix(inner, "</tool_call>")
   inner = cleanJSONBlock(inner)
 
   if calls, ok := parseToolCallsFromText(inner); ok {
@@ -1658,51 +1651,6 @@ func parseXMLToolCall(block string) ([]ToolCall, bool) {
   return nil, false
 }
 
-func ExtractToolCallBlocks(content string) (blocks []string, remaining string) {
-  var b []string
-  s := content
-  searchOffset := 0
-  var remainingBuilder strings.Builder
-  lastPos := 0
-
-  for {
-    relStart := strings.Index(s[searchOffset:], "<tool_call>")
-    if relStart == -1 {
-      break
-    }
-    startIdx := searchOffset + relStart
-    afterStart := startIdx + len("<tool_call>")
-
-    relEnd := strings.Index(s[afterStart:], "</tool_call>")
-    if relEnd == -1 {
-      // Unclosed <tool_call>, do not treat as block
-      searchOffset = afterStart
-      continue
-    }
-
-    if innerNext := strings.Index(s[afterStart:afterStart+relEnd], "<tool_call>"); innerNext != -1 {
-      searchOffset = afterStart + innerNext
-      continue
-    }
-
-    endIdx := afterStart + relEnd + len("</tool_call>")
-    blockText := s[startIdx:endIdx]
-    b = append(b, blockText)
-
-    if startIdx > lastPos {
-      remainingBuilder.WriteString(s[lastPos:startIdx])
-    }
-    lastPos = endIdx
-    searchOffset = endIdx
-  }
-
-  if lastPos < len(s) {
-    remainingBuilder.WriteString(s[lastPos:])
-  }
-
-  return b, strings.TrimSpace(remainingBuilder.String())
-}
-
 func DetectToolCalls(content string, allowedTools map[string]bool) ([]ToolCall, string, bool) {
   if len(allowedTools) == 0 {
     return nil, content, false
@@ -2200,10 +2148,9 @@ func WriteCompletionResponse(w http.ResponseWriter, completionID string, created
 }
 
 type APIErrorDetail struct {
-  Message string  `json:"message"`
-  Type    string  `json:"type"`
-  Param   *string `json:"param"`
-  Code    int     `json:"code"`
+  Message string `json:"message"`
+  Type    string `json:"type"`
+  Code    int    `json:"code"`
 }
 
 type APIErrorResponse struct {
@@ -2232,7 +2179,6 @@ type GroqqerGateway struct {
   proxyURL     string
   userAgent    string
   defaultModel string
-  port         int
   models       []ModelItem
   modelsMu     sync.RWMutex
 }
@@ -2664,12 +2610,6 @@ func main() {
   flag.StringVar(socksProxy, "proxy", "", "Proxy address alias")
   flag.StringVar(socksProxy, "socks5", "", "SOCKS5 proxy alias")
 
-  // Retain flags for backward compatibility (browser/Xvfb are no longer required)
-  _ = flag.String("browser", "", "Ignored: browser is no longer required (headless WebSocket mode)")
-  _ = flag.Bool("xvfb", false, "Ignored: Xvfb is no longer required")
-  _ = flag.Bool("no-xvfb", false, "Ignored: Xvfb is no longer required")
-  _ = flag.Bool("headless", true, "Ignored: always runs headless via direct WebSocket")
-
   flag.Parse()
 
   effectiveProxy := *socksProxy
@@ -2689,7 +2629,6 @@ func main() {
     proxyURL:     effectiveProxy,
     userAgent:    *userAgent,
     defaultModel: *defaultModel,
-    port:         *port,
   }
 
   // Initial discovery of live models in background