fix(agent): rebase alias-tag parser and align channel send API

src/agent/loop_.rs

@@ -330,7 +330,6 @@ fn parse_tool_calls_from_json_value(value: &serde_json::Value) -> Vec<ParsedTool
 }
 
 const TOOL_CALL_OPEN_TAGS: [&str; 3] = ["<tool_call>", "<toolcall>", "<tool-call>"];
-const TOOL_CALL_CLOSE_TAGS: [&str; 3] = ["</tool_call>", "</toolcall>", "</tool-call>"];
 
 fn find_first_tag<'a>(haystack: &str, tags: &'a [&'a str]) -> Option<(usize, &'a str)> {
     tags.iter()
@@ -338,6 +337,15 @@ fn find_first_tag<'a>(haystack: &str, tags: &'a [&'a str]) -> Option<(usize, &'a
         .min_by_key(|(idx, _)| *idx)
 }
 
+fn matching_tool_call_close_tag(open_tag: &str) -> Option<&'static str> {
+    match open_tag {
+        "<tool_call>" => Some("</tool_call>"),
+        "<toolcall>" => Some("</toolcall>"),
+        "<tool-call>" => Some("</tool-call>"),
+        _ => None,
+    }
+}
+
 /// Extract JSON values from a string.
 ///
 /// # Security Warning
@@ -426,8 +434,12 @@ fn parse_tool_calls(response: &str) -> (String, Vec<ParsedToolCall>) {
             text_parts.push(before.trim().to_string());
         }
 
+        let Some(close_tag) = matching_tool_call_close_tag(open_tag) else {
+            break;
+        };
+
         let after_open = &remaining[start + open_tag.len()..];
-        if let Some((close_idx, close_tag)) = find_first_tag(after_open, &TOOL_CALL_CLOSE_TAGS) {
+        if let Some(close_idx) = after_open.find(close_tag) {
             let inner = &after_open[..close_idx];
             let mut parsed_any = false;
             let json_values = extract_json_values(inner);
@@ -454,7 +466,7 @@ fn parse_tool_calls(response: &str) -> (String, Vec<ParsedToolCall>) {
     // (e.g., in emails, files, or web pages) could include JSON that mimics a
     // tool call. Tool calls MUST be explicitly wrapped in either:
     // 1. OpenAI-style JSON with a "tool_calls" array
-    // 2. ZeroClaw <invoke>...</invoke> tags
+    // 2. ZeroClaw tool-call tags (<tool_call>, <toolcall>, <tool-call>)
     // This ensures only the LLM's intentional tool calls are executed.
 
     // Remaining text after last tool call
@@ -1541,6 +1553,18 @@ I will now call the tool with this payload:
         );
     }
 
+    #[test]
+    fn parse_tool_calls_does_not_cross_match_alias_tags() {
+        let response = r#"<toolcall>
+{"name": "shell", "arguments": {"command": "date"}}
+</tool_call>"#;
+
+        let (text, calls) = parse_tool_calls(response);
+        assert!(calls.is_empty());
+        assert!(text.contains("<toolcall>"));
+        assert!(text.contains("</tool_call>"));
+    }
+
     #[test]
     fn parse_tool_calls_rejects_raw_tool_json_without_tags() {
         // SECURITY: Raw JSON without explicit wrappers should NOT be parsed