diff --git a/scripts/src/hwlab-node-lanes.ts b/scripts/src/hwlab-node-lanes.ts
index 7d96b32f..01232465 100644
--- a/scripts/src/hwlab-node-lanes.ts
+++ b/scripts/src/hwlab-node-lanes.ts
@@ -1319,6 +1319,8 @@ function webProbeWorkbenchKafkaDebugReplayConfig(value: unknown, path: string):
   const completionTimeoutMs = numberField(raw, "completionTimeoutMs", path);
   if (!/^[A-Za-z0-9._-]+$/u.test(topic)) throw new Error(`${path}.topic must use Kafka topic identifier characters`);
   if (!/^[A-Za-z0-9._-]+$/u.test(groupPrefix)) throw new Error(`${path}.groupPrefix must use Kafka consumer group identifier characters`);
+  if (!/(?:^|[.-])debug(?:[.-]|$)/u.test(topic)) throw new Error(`${path}.topic must identify an isolated debug topic`);
+  if (!/(?:^|[.-])debug(?:[.-]|$)/u.test(groupPrefix)) throw new Error(`${path}.groupPrefix must identify an isolated debug consumer group`);
   if (!Number.isInteger(completionTimeoutMs) || completionTimeoutMs < 1000 || completionTimeoutMs > 120000) {
     throw new Error(`${path}.completionTimeoutMs must be an integer between 1000 and 120000`);
   }