diff --git a/web/src/utils/markdown-manipulation.ts b/web/src/utils/markdown-manipulation.ts
index 53eb15333..e02dae474 100644
--- a/web/src/utils/markdown-manipulation.ts
+++ b/web/src/utils/markdown-manipulation.ts
@@ -24,6 +24,39 @@ export function toggleTaskAtLine(markdown: string, lineNumber: number, checked:
 
   return lines.join("\n");
 }
+export function isInsideCodeBlock(lines :string [] , index : number):boolean{
+  let inside = false;
+  for(let i = 0 ; i <= index ; i++){
+    if(lines[i].startsWith("```")){
+      inside = !inside;
+    }
+  }
+   return inside;
+}
+export function toggleTaskAtIndex(markdown: string, taskIndex: number, checked: boolean): string {
+  const lines = markdown.split("\n");
+  const taskPattern = /^(\s*[-*+]\s+)\[([ xX])\](\s+.*)$/;
+
+  let currentTaskIndex = 0;
+
+  for (let i = 0; i < lines.length; i++) {
+    if (isInsideCodeBlock(lines, i)) continue;
+    const line = lines[i];
+    const match = line.match(taskPattern);
+
+    if (match) {
+      if (currentTaskIndex === taskIndex) {
+        const [, prefix, , suffix] = match;
+        const newCheckmark = checked ? "x" : " ";
+        lines[i] = `${prefix}[${newCheckmark}]${suffix}`;
+        break;
+      }
+      currentTaskIndex++;
+    }
+  }
+
+  return lines.join("\n");
+}
 
 export function removeCompletedTasks(markdown: string): string {
   const lines = markdown.split("\n");