fix pre delete dirmd set dir bug and implement last git sha and commit#

cmd/root.go

@@ -30,7 +30,7 @@ Examples:
   # Create new documentation (writes index.md inside ./docs/)
   dirmd -o ./docs ~/repos/myproject
 
-  # Overwrite existing output directory
+  # Overwrite existing output directory (DELETES everything in it first)
   dirmd -o ./docs ~/repos/myproject -f
 
   # Append a single file
@@ -86,7 +86,7 @@ func Execute() {
 func init() {
 	rootCmd.PersistentFlags().StringVarP(&outputPath, "output", "o", "", "output directory (required)")
 	rootCmd.Flags().BoolVarP(&appendMode, "append", "a", false, "append to existing index.md")
-	rootCmd.Flags().BoolVarP(&force, "force", "f", false, "overwrite existing output directory")
+	rootCmd.Flags().BoolVarP(&force, "force", "f", false, "overwrite existing output directory (deletes all contents)")
 	rootCmd.Flags().StringVar(&singleFile, "input-file", "", "single file input (append mode only)")
 	rootCmd.Flags().BoolVarP(&tuiMode, "interactive", "i", false, "launch interactive TUI configuration wizard")
 	rootCmd.Flags().Int64Var(&maxSize, "max-size", config.DefaultMaxSize, "max file size in bytes")
@@ -173,9 +173,16 @@ func run(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("failed to resolve output path: %w", err)
 	}
 
+	// Handle output directory existence
 	if !appendMode {
-		if _, err := os.Stat(absOutput); err == nil && !force {
-			return fmt.Errorf("output directory %s already exists (use -f to overwrite)", absOutput)
+		if _, err := os.Stat(absOutput); err == nil {
+			if !force {
+				return fmt.Errorf("output directory %s already exists (use -f to overwrite)", absOutput)
+			}
+			// FORCE MODE: Always delete the entire directory and recreate it fresh
+			if err := os.RemoveAll(absOutput); err != nil {
+				return fmt.Errorf("failed to remove existing output directory: %w", err)
+			}
 		}
 	}