diff --git a/config.go b/config.go
index 8f422c4..de45af8 100644
--- a/config.go
+++ b/config.go
@@ -57,7 +57,7 @@ func newConfigFromEnv(ctx context.Context, getEnv func(string) string) (Config,
 		DatacenterPattern: renderDatacenterPattern,
 		EventNamePattern:  renderEventNamePattern,
 		RecapPromptIntro:  "A Slack thread began with the following original post.",
-		RecapPrompt:       "In 1 sentence without any leading text, summarize all of the following Slack thread responses.",
+		RecapPrompt:       "In 1 sentence and without any leading text and as briefly as possible, summarize all of the following Slack thread responses.",
 	}
 
 	var m map[string]any