diff --git a/cmd/analyze.go b/cmd/analyze.go
index 92c54d7..5755c61 100644
--- a/cmd/analyze.go
+++ b/cmd/analyze.go
@@ -30,7 +30,7 @@ Uses language-specific prompts discovered in .grokkit/prompts/ or ~/.config/grok
 		}
 		output := viper.GetString("output")
 		if output == "" {
-			output = "analyze.md"
+			output = "analysis.md"
 		}
 		// Fixed: config.GetModel takes (commandName, flagModel)
 		model := config.GetModel("analyze", viper.GetString("model"))
diff --git a/internal/linter/linter.go b/internal/linter/linter.go
index c89c010..32cec92 100644
--- a/internal/linter/linter.go
+++ b/internal/linter/linter.go
@@ -170,6 +170,10 @@ var languages = []Language{
 			},
 		},
 	},
+	{
+		Name:       "Rexx",
+		Extensions: []string{".rx", ".rex", ".rexlib", ".rexx", ".cls"},
+	},
 }
 
 // DetectLanguage detects the programming language based on file extension