diff --git a/loop/agent.go b/loop/agent.go
index 538bce8..9fb53e5 100644
--- a/loop/agent.go
+++ b/loop/agent.go
@@ -1269,7 +1269,7 @@
 	browserTools = bTools
 
 	convo.Tools = []*llm.Tool{
-		bashTool, claudetool.Keyword, claudetool.Patch(nil),
+		bashTool, claudetool.Keyword, claudetool.Patch(a.patchCallback),
 		claudetool.Think, claudetool.TodoRead, claudetool.TodoWrite, a.setSlugTool(), a.commitMessageStyleTool(), makeDoneTool(a.codereview),
 		a.codereview.Tool(), claudetool.AboutSketch,
 	}
@@ -1460,6 +1460,15 @@
 	return preCommit
 }
 
+// patchCallback is the agent's patch tool callback.
+// It warms the codereview cache in the background.
+func (a *Agent) patchCallback(input claudetool.PatchInput, result []llm.Content, err error) ([]llm.Content, error) {
+	if a.codereview != nil {
+		a.codereview.WarmTestCache(input.Path)
+	}
+	return result, err
+}
+
 func (a *Agent) Ready() <-chan struct{} {
 	return a.ready
 }