claudetool: change title tool to precommit, add commit style guidance
diff --git a/experiment/experiment.go b/experiment/experiment.go
index 6f126ab..826c56c 100644
--- a/experiment/experiment.go
+++ b/experiment/experiment.go
@@ -35,6 +35,10 @@
 			Name:        "llm_review",
 			Description: "Add an LLM step to the codereview tool",
 		},
+		{
+			Name:        "precommit",
+			Description: "Changes title tool to a precommit tool that provides commit message style guidance",
+		},
 	}
 	byName = map[string]*Experiment{}
 )