feat: optimize heartbeat token usage

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/adapter-utils/src/server-utils.ts

@@ -112,6 +112,16 @@ export function renderTemplate(template: string, data: Record<string, unknown>)
   return template.replace(/{{\s*([a-zA-Z0-9_.-]+)\s*}}/g, (_, path) => resolvePathValue(data, path));
 }
 
+export function joinPromptSections(
+  sections: Array<string | null | undefined>,
+  separator = "\n\n",
+) {
+  return sections
+    .map((value) => (typeof value === "string" ? value.trim() : ""))
+    .filter(Boolean)
+    .join(separator);
+}
+
 export function redactEnvForLogs(env: Record<string, string>): Record<string, string> {
   const redacted: Record<string, string> = {};
   for (const [key, value] of Object.entries(env)) {