storkit: merge 420_story_loc_for_a_specified_file_bot_command_and_web_ui_slash_command

server/src/http/mcp/diagnostics.rs

@@ -265,6 +265,17 @@ pub(super) fn tool_move_story(args: &Value, ctx: &AppContext) -> Result<String,
     .map_err(|e| format!("Serialization error: {e}"))
 }
 
+/// MCP tool: count lines in a specific file relative to the project root.
+pub(super) fn tool_loc_file(args: &Value, ctx: &AppContext) -> Result<String, String> {
+    let file_path = args
+        .get("file_path")
+        .and_then(|v| v.as_str())
+        .ok_or_else(|| "Missing required argument: file_path".to_string())?;
+
+    let project_root = ctx.state.get_project_root()?;
+    Ok(crate::chat::commands::loc::loc_single_file(&project_root, file_path))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;