Refactor WordPress prompt system and add completion signal

chat/server.js

@@ -8723,6 +8723,20 @@ async function sendToOpencode({ session, model, content, message, cli, streamCal
     // Use accumulated text output (partialOutput) since we're using --format json
     const finalOutput = filterOpencodeStatusMessages(partialOutput || '');
 
+    // Check for completion signal and process it
+    const completionMatch = finalOutput.match(/\s*[COMPLETE]\s*$/i);
+    let processedOutput = finalOutput;
+    if (completionMatch) {
+      // Remove the completion signal from the output
+      processedOutput = finalOutput.slice(0, completionMatch.index).trim();
+      log('OpenCode completion signal detected', {
+        messageId: messageKey,
+        hadCompletionSignal: true,
+        originalLength: finalOutput.length,
+        processedLength: processedOutput.length
+      });
+    }
+
     // Mark message as done to prevent false "stalled" detection
     if (message) {
       message.status = 'done';
@@ -8733,7 +8747,7 @@ async function sendToOpencode({ session, model, content, message, cli, streamCal
     }
 
     // The reply is the final accumulated output
-    let reply = finalOutput;
+    let reply = processedOutput;
 
     if (message) {
       message.partialOutput = finalOutput;