Monitor Tool The Monitor tool spawns a background watcher and streams its events into the conversation as new transcript messages. Each event lands immediately and Claude reacts to it — no polling loop, no holding the turn open with a . Available since v2.1.98. What It Does The conversation stays open. Events arrive asynchronously. Claude processes each one and decides whether to act. Common Use Cases Tail a log file Claude spawns a watcher on . Each new log line arrives as a transcript message. When a 5xx pattern matches, Claude reacts immediately — describe the error, suggest a fix, or appl…