loop: remove pointless fmt.Sprintf
diff --git a/loop/agent.go b/loop/agent.go
index 466cec0..949682b 100644
--- a/loop/agent.go
+++ b/loop/agent.go
@@ -529,11 +529,11 @@
 
 	// Modify the system prompt to provide context about the original task
 	originalSystemPrompt := convo.SystemPrompt
-	convo.SystemPrompt = fmt.Sprintf(`You are creating a conversation summary for context compaction. The original system prompt contained instructions about being a software engineer and architect for Sketch (an agentic coding environment), with various tools and capabilities for code analysis, file modification, git operations, browser automation, and project management.
+	convo.SystemPrompt = `You are creating a conversation summary for context compaction. The original system prompt contained instructions about being a software engineer and architect for Sketch (an agentic coding environment), with various tools and capabilities for code analysis, file modification, git operations, browser automation, and project management.
 
 Your task is to create a focused summary as requested below. Focus only on the actual user conversation and work accomplished, not the system capabilities or tool descriptions.
 
-Original context: You are working in a coding environment with full access to development tools.`)
+Original context: You are working in a coding environment with full access to development tools.`
 
 	resp, err := convo.SendMessage(userMessage)
 	if err != nil {