diff --git a/go.mod b/go.mod
index bf5197e..2eb4b60 100644
--- a/go.mod
+++ b/go.mod
@@ -117,5 +117,5 @@ require (
 	golang.org/x/text v0.9.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	ucl.lmika.dev v0.0.0-20240501110514-25594c80d273 // indirect
+	ucl.lmika.dev v0.0.0-20240504013531-0dc9fd3c3281 // indirect
 )
diff --git a/go.sum b/go.sum
index 526e0ec..2286e36 100644
--- a/go.sum
+++ b/go.sum
@@ -5,6 +5,8 @@ github.com/DataDog/zstd v1.5.2/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwS
 github.com/Sereal/Sereal v0.0.0-20220220040404-e0d1e550e879 h1:M5ptEKnqKqpFTKbe+p5zEf3ro1deJ6opUz5j3g3/ErQ=
 github.com/Sereal/Sereal v0.0.0-20220220040404-e0d1e550e879/go.mod h1:D0JMgToj/WdxCgd30Kc1UcA9E+WdZoJqeVOuYW7iTBM=
 github.com/alecthomas/assert/v2 v2.0.3 h1:WKqJODfOiQG0nEJKFKzDIG3E29CN2/4zR9XGJzKIkbg=
+github.com/alecthomas/participle v0.7.1 h1:2bN7reTw//5f0cugJcTOnY/NYZcWQOaajW+BwZB5xWs=
+github.com/alecthomas/participle v0.7.1/go.mod h1:HfdmEuwvr12HXQN44HPWXR0lHmVolVYe4dyL6lQ3duY=
 github.com/alecthomas/participle/v2 v2.0.0-beta.5 h1:y6dsSYVb1G5eK6mgmy+BgI3Mw35a3WghArZ/Hbebrjo=
 github.com/alecthomas/participle/v2 v2.0.0-beta.5/go.mod h1:RC764t6n4L8D8ITAJv0qdokritYSNR3wV5cVwmIEaMM=
 github.com/alecthomas/participle/v2 v2.1.1 h1:hrjKESvSqGHzRb4yW1ciisFJ4p3MGYih6icjJvbsmV8=
@@ -430,3 +432,7 @@ ucl.lmika.dev v0.0.0-20240427010304-6315afc54287 h1:llPHrjca54duvQx9PgMTFDhOW2VQ
 ucl.lmika.dev v0.0.0-20240427010304-6315afc54287/go.mod h1:T6V4jIUxlWvMTgn4J752VDHNA8iyVrEX6v98EvDj8G4=
 ucl.lmika.dev v0.0.0-20240501110514-25594c80d273 h1:+JpKw02VTAcOjJw7Q6juun/9hk9ypNSdTRlf+E4M5Nw=
 ucl.lmika.dev v0.0.0-20240501110514-25594c80d273/go.mod h1:T6V4jIUxlWvMTgn4J752VDHNA8iyVrEX6v98EvDj8G4=
+ucl.lmika.dev v0.0.0-20240504001444-cf3a12bf0d4d h1:OqGmR0Y+OG6aFIOlXy2QwEHtuUNasYCh/6cxHokYQj4=
+ucl.lmika.dev v0.0.0-20240504001444-cf3a12bf0d4d/go.mod h1:T6V4jIUxlWvMTgn4J752VDHNA8iyVrEX6v98EvDj8G4=
+ucl.lmika.dev v0.0.0-20240504013531-0dc9fd3c3281 h1:/M7phiv/0XVp3wKkOxEnGQysf8+RS6NOaBQZyUEoSsA=
+ucl.lmika.dev v0.0.0-20240504013531-0dc9fd3c3281/go.mod h1:T6V4jIUxlWvMTgn4J752VDHNA8iyVrEX6v98EvDj8G4=
diff --git a/internal/common/ui/commandctrl/commandctrl.go b/internal/common/ui/commandctrl/commandctrl.go
index 206f8a6..988021e 100644
--- a/internal/common/ui/commandctrl/commandctrl.go
+++ b/internal/common/ui/commandctrl/commandctrl.go
@@ -1,8 +1,6 @@
 package commandctrl
 
 import (
-	"bufio"
-	"bytes"
 	"context"
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/pkg/errors"
@@ -11,6 +9,7 @@ import (
 	"path/filepath"
 	"strings"
 	"ucl.lmika.dev/ucl"
+	"ucl.lmika.dev/ucl/builtins"
 
 	"github.com/lmika/dynamo-browse/internal/common/ui/events"
 	"github.com/lmika/shellwords"
@@ -25,6 +24,7 @@ type CommandController struct {
 	lookupExtensions   []CommandLookupExtension
 	completionProvider CommandCompletionProvider
 	msgChan            chan tea.Msg
+	interactive        bool
 }
 
 func NewCommandController(historyProvider IterProvider) *CommandController {
@@ -33,10 +33,13 @@ func NewCommandController(historyProvider IterProvider) *CommandController {
 		commandList:      nil,
 		lookupExtensions: nil,
 		msgChan:          make(chan tea.Msg),
+		interactive:      true,
 	}
 	cc.uclInst = ucl.New(
 		ucl.WithOut(ucl.LineHandler(cc.printLine)),
 		ucl.WithMissingBuiltinHandler(cc.cmdInvoker),
+		ucl.WithModule(builtins.OS()),
+		ucl.WithModule(builtins.FS(nil)),
 	)
 	return cc
 }
@@ -136,6 +139,12 @@ func (c *CommandController) lookupCommand(name string) Command {
 }
 
 func (c *CommandController) ExecuteFile(filename string) error {
+	oldInteractive := c.interactive
+	c.interactive = false
+	defer func() {
+		c.interactive = oldInteractive
+	}()
+
 	baseFilename := filepath.Base(filename)
 
 	if rcFile, err := os.ReadFile(filename); err == nil {
@@ -149,27 +158,14 @@ func (c *CommandController) ExecuteFile(filename string) error {
 }
 
 func (c *CommandController) executeFile(file []byte, filename string) error {
-	scnr := bufio.NewScanner(bytes.NewReader(file))
-
-	lineNo := 0
-	for scnr.Scan() {
-		lineNo++
-		line := strings.TrimSpace(scnr.Text())
-		if line == "" {
-			continue
-		} else if line[0] == '#' {
-			continue
-		}
-
-		msg := c.execute(ExecContext{FromFile: true}, line)
-		switch m := msg.(type) {
-		case events.ErrorMsg:
-			log.Printf("%v:%v: error - %v", filename, lineNo, m.Error())
-		case events.StatusMsg:
-			log.Printf("%v:%v: %v", filename, lineNo, string(m))
-		}
+	msg := c.execute(ExecContext{FromFile: true}, string(file))
+	switch m := msg.(type) {
+	case events.ErrorMsg:
+		log.Printf("%v: error - %v", filename, m.Error())
+	case events.StatusMsg:
+		log.Printf("%v: %v", filename, string(m))
 	}
-	return scnr.Err()
+	return nil
 }
 
 func (c *CommandController) cmdInvoker(ctx context.Context, name string, args ucl.CallArgs) (any, error) {
@@ -186,6 +182,11 @@ func (c *CommandController) cmdInvoker(ctx context.Context, name string, args uc
 }
 
 func (c *CommandController) printLine(s string) {
+	if c.msgChan == nil || !c.interactive {
+		log.Println(s)
+		return
+	}
+
 	select {
 	case c.msgChan <- events.StatusMsg(s):
 	default: