diff --git a/internal/project/project.go b/internal/project/project.go
index e68c34d..f9da07e 100644
--- a/internal/project/project.go
+++ b/internal/project/project.go
@@ -139,9 +139,7 @@ func (p *Project) ValidateLayout() error {
 	}
 
 	for label, pathFn := range map[string]func() string{
-		"paths.source": p.SourceDir,
-		"paths.assets": p.AssetsDir,
-		"paths.build":  p.BuildDir,
+		"paths.build": p.BuildDir,
 	} {
 		path := pathFn()
 		if path == "" || filepath.Clean(path) == p.Root {
@@ -149,9 +147,6 @@ func (p *Project) ValidateLayout() error {
 		}
 		info, err := os.Stat(path)
 		if err != nil {
-			if label == "paths.assets" && errors.Is(err, os.ErrNotExist) {
-				continue
-			}
 			failures = append(failures, fmt.Errorf("%s: %w", label, err))
 			continue
 		}
@@ -349,9 +344,7 @@ func (i Inventory) Report() InventoryReport {
 func defaultConfig() Config {
 	return Config{
 		Paths: PathConfig{
-			Source: "src",
-			Assets: "assets",
-			Build:  "build",
+			Build: "build",
 		},
 		TopData: TopDataConfig{
 			Build: ".cache",