diff --git a/Makefile b/Makefile
index 3a12968..202f672 100644
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,7 @@ GO_LDFLAGS_CMD = go run _scripts/goldflags.go
 GO_LDFLAGS_PACKAGE = cmd
 GO_LDFLAGS_PACKAGES = \
  	starlarkVersion=go.starlark.net \
+	starlibVersion=github.com/qri-io/starlib \
 	terraformVersion=github.com/hashicorp/terraform
 
 # Site
diff --git a/cmd/repl.go b/cmd/repl.go
index 0364408..68a6e6a 100644
--- a/cmd/repl.go
+++ b/cmd/repl.go
@@ -1,5 +1,8 @@
 package cmd
 
+import "github.com/jessevdk/go-flags"
+
+// Command descriptions used in the flags.Parser.AddCommand.
 const (
 	REPLCmdShortDescription = "Run as interactive shell."
 	REPLCmdLongDescription  = REPLCmdShortDescription + "\n\n" +
@@ -7,13 +10,17 @@ const (
 		"command."
 )
 
+// REPLCmd implements the command `repl`.
 type REPLCmd struct {
 	commonCmd
 }
 
+// Execute honors the flags.Commander interface.
 func (c *REPLCmd) Execute(args []string) error {
 	c.init()
 	c.runtime.REPL()
 
 	return nil
 }
+
+var _ flags.Commander = &REPLCmd{}
diff --git a/cmd/run.go b/cmd/run.go
index 96ca0ab..7744baa 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -6,9 +6,11 @@ import (
 	"os"
 
 	"github.com/hashicorp/hcl2/hclwrite"
+	"github.com/jessevdk/go-flags"
 	"go.starlark.net/starlark"
 )
 
+// Command descriptions used in the flags.Parser.AddCommand.
 const (
 	RunCmdShortDescription = "Run parses, resolves, and executes a Starlark file."
 	RunCmdLongDescription  = RunCmdShortDescription + "\n\n" +
@@ -20,6 +22,7 @@ const (
 		"and plan commands.\n"
 )
 
+// RunCmd implements the command `run`.
 type RunCmd struct {
 	commonCmd
 
@@ -30,6 +33,7 @@ type RunCmd struct {
 	} `positional-args:"true" required:"1"`
 }
 
+// Execute honors the flags.Commander interface.
 func (c *RunCmd) Execute(args []string) error {
 	c.init()
 
@@ -65,3 +69,5 @@ func (c *RunCmd) dumpToHCL(ctx starlark.StringDict) error {
 
 	return ioutil.WriteFile(c.ToHCL, f.Bytes(), 0644)
 }
+
+var _ flags.Commander = &RunCmd{}
diff --git a/cmd/version.go b/cmd/version.go
index 06fcf90..cbaeeb8 100644
--- a/cmd/version.go
+++ b/cmd/version.go
@@ -3,8 +3,11 @@ package cmd
 import (
 	"fmt"
 	"runtime"
+
+	"github.com/jessevdk/go-flags"
 )
 
+// Command descriptions used in the flags.Parser.AddCommand.
 const (
 	VersionCmdShortDescription = "Version prints information about this binary."
 	VersionCmdLongDescription  = VersionCmdShortDescription + "\n\n" +
@@ -12,14 +15,19 @@ const (
 		"date but also versions from the Go runtime and other dependencies."
 )
 
-var version string
-var commit string
-var build string
-var terraformVersion string
-var starlarkVersion string
+var (
+	version          string
+	commit           string
+	build            string
+	terraformVersion string
+	starlarkVersion  string
+	starlibVersion   string
+)
 
+// VersionCmd implements the command `version`.
 type VersionCmd struct{}
 
+// Execute honors the flags.Commander interface.
 func (c *VersionCmd) Execute(args []string) error {
 	fmt.Printf("Go Version: %s\n", runtime.Version())
 	fmt.Printf("AsCode Version: %s\n", version)
@@ -27,6 +35,9 @@ func (c *VersionCmd) Execute(args []string) error {
 	fmt.Printf("AsCode Build Date: %s\n", build)
 	fmt.Printf("Terraform Version: %s\n", terraformVersion)
 	fmt.Printf("Starlark Version: %s\n", starlarkVersion)
+	fmt.Printf("Starlib Version: %s\n", starlibVersion)
 
 	return nil
 }
+
+var _ flags.Commander = &VersionCmd{}
diff --git a/starlark/module/docker/image.go b/starlark/module/docker/image.go
index e8c6387..346c0ad 100644
--- a/starlark/module/docker/image.go
+++ b/starlark/module/docker/image.go
@@ -22,9 +22,8 @@ const (
 	// in starlark's load() function, eg: load('docker', 'docker')
 	ModuleName = "docker"
 
-	ImageFuncName = "image"
-
-	latestTag = "lastest"
+	imageFuncName = "image"
+	latestTag     = "lastest"
 )
 
 var (
@@ -44,7 +43,7 @@ func LoadModule() (starlark.StringDict, error) {
 			"docker": &starlarkstruct.Module{
 				Name: "docker",
 				Members: starlark.StringDict{
-					ImageFuncName: starlark.NewBuiltin(ImageFuncName, Image),
+					imageFuncName: starlark.NewBuiltin(imageFuncName, Image),
 				},
 			},
 		}
@@ -104,7 +103,7 @@ func Image(
 ) (starlark.Value, error) {
 
 	var image, constraint string
-	err := starlark.UnpackArgs(ImageFuncName, args, kwargs, "image", &image, "constraint", &constraint)
+	err := starlark.UnpackArgs(imageFuncName, args, kwargs, "image", &image, "constraint", &constraint)
 	if err != nil {
 		return nil, err
 	}
diff --git a/starlark/module/filepath/filepath.go b/starlark/module/filepath/filepath.go
index edf55d5..12cd6b1 100644
--- a/starlark/module/filepath/filepath.go
+++ b/starlark/module/filepath/filepath.go
@@ -1,4 +1,4 @@
-package filepath 
+package filepath
 
 import (
 	"path/filepath"
@@ -13,16 +13,16 @@ const (
 	// in starlark's load() function, eg: load('io/ioutil', 'json')
 	ModuleName = "path/filepath"
 
-	SeparatorVarName = "separator"
-	AbsFuncName      = "abs"
-	BaseFuncName     = "base"
-	CleanFuncName    = "clean"
-	DirFuncName      = "dir"
-	ExtFuncName      = "ext"
-	GlobFuncName     = "glob"
-	IsAbsFuncName    = "is_abs"
-	JoinFuncName     = "join"
-	RelFuncName      = "rel"
+	separatorVarName = "separator"
+	absFuncName      = "abs"
+	baseFuncName     = "base"
+	cleanFuncName    = "clean"
+	dirFuncName      = "dir"
+	extFuncName      = "ext"
+	globFuncName     = "glob"
+	isAbsFuncName    = "is_abs"
+	joinFuncName     = "join"
+	relFuncName      = "rel"
 )
 
 var (
@@ -43,16 +43,16 @@ func LoadModule() (starlark.StringDict, error) {
 			"filepath": &starlarkstruct.Module{
 				Name: "filepath",
 				Members: starlark.StringDict{
-					SeparatorVarName: starlark.String(string(filepath.Separator)),
-					GlobFuncName:     starlark.NewBuiltin(GlobFuncName, Glob),
-					AbsFuncName:      starlark.NewBuiltin(AbsFuncName, Abs),
-					BaseFuncName:     starlark.NewBuiltin(BaseFuncName, Base),
-					CleanFuncName:    starlark.NewBuiltin(CleanFuncName, Clean),
-					DirFuncName:      starlark.NewBuiltin(DirFuncName, Dir),
-					ExtFuncName:      starlark.NewBuiltin(ExtFuncName, Ext),
-					IsAbsFuncName:    starlark.NewBuiltin(IsAbsFuncName, IsAbs),
-					JoinFuncName:     starlark.NewBuiltin(JoinFuncName, Join),
-					RelFuncName:      starlark.NewBuiltin(RelFuncName, Rel),
+					separatorVarName: starlark.String(string(filepath.Separator)),
+					globFuncName:     starlark.NewBuiltin(globFuncName, Glob),
+					absFuncName:      starlark.NewBuiltin(absFuncName, Abs),
+					baseFuncName:     starlark.NewBuiltin(baseFuncName, Base),
+					cleanFuncName:    starlark.NewBuiltin(cleanFuncName, Clean),
+					dirFuncName:      starlark.NewBuiltin(dirFuncName, Dir),
+					extFuncName:      starlark.NewBuiltin(extFuncName, Ext),
+					isAbsFuncName:    starlark.NewBuiltin(isAbsFuncName, IsAbs),
+					joinFuncName:     starlark.NewBuiltin(joinFuncName, Join),
+					relFuncName:      starlark.NewBuiltin(relFuncName, Rel),
 				},
 			},
 		}
@@ -75,7 +75,7 @@ func LoadModule() (starlark.StringDict, error) {
 func Glob(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var pattern string
 
-	err := starlark.UnpackArgs(GlobFuncName, args, kwargs, "pattern", &pattern)
+	err := starlark.UnpackArgs(globFuncName, args, kwargs, "pattern", &pattern)
 	if err != nil {
 		return nil, err
 	}
@@ -109,7 +109,7 @@ func Glob(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwa
 func Abs(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(AbsFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(absFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -139,7 +139,7 @@ func Abs(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwar
 func Base(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(BaseFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(baseFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -160,7 +160,7 @@ func Base(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwa
 func Clean(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(CleanFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(cleanFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -185,7 +185,7 @@ func Clean(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kw
 func Dir(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(DirFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(dirFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -209,7 +209,7 @@ func Dir(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwar
 func Ext(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(ExtFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(extFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -229,7 +229,7 @@ func Ext(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwar
 func IsAbs(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(IsAbsFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(isAbsFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -253,7 +253,7 @@ func IsAbs(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kw
 func Join(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var elements *starlark.List
 
-	err := starlark.UnpackArgs(JoinFuncName, args, kwargs, "elements", &elements)
+	err := starlark.UnpackArgs(joinFuncName, args, kwargs, "elements", &elements)
 	if err != nil {
 		return nil, err
 	}
@@ -287,7 +287,7 @@ func Join(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwa
 func Rel(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var basepath, targpath string
 
-	err := starlark.UnpackArgs(RelFuncName, args, kwargs, "basepath", &basepath, "targpath", &targpath)
+	err := starlark.UnpackArgs(relFuncName, args, kwargs, "basepath", &basepath, "targpath", &targpath)
 	if err != nil {
 		return nil, err
 	}
diff --git a/starlark/module/os/os.go b/starlark/module/os/os.go
index f491da2..3acd2fa 100644
--- a/starlark/module/os/os.go
+++ b/starlark/module/os/os.go
@@ -14,18 +14,18 @@ const (
 	// in starlark's load() function, eg: load('io/ioutil', 'json')
 	ModuleName = "os"
 
-	GetwdFuncName     = "getwd"
-	ChdirFuncName     = "chdir"
-	GetenvFuncName    = "getenv"
-	SetenvFuncName    = "setenv"
-	WriteFileFuncName = "write_file"
-	ReadFileFuncName  = "read_file"
-	MkdirFuncName     = "mkdir"
-	MkdirAllFuncName  = "mkdir_all"
-	RemoveFuncName    = "remove"
-	RemoveAllFuncName = "remove_all"
-	RenameFuncName    = "rename"
-	TempDirFuncName   = "temp_dir"
+	getwdFuncName     = "getwd"
+	chdirFuncName     = "chdir"
+	getenvFuncName    = "getenv"
+	setenvFuncName    = "setenv"
+	writeFileFuncName = "write_file"
+	readFileFuncName  = "read_file"
+	mkdirFuncName     = "mkdir"
+	mkdirAllFuncName  = "mkdir_all"
+	removeFuncName    = "remove"
+	removeAllFuncName = "remove_all"
+	renameFuncName    = "rename"
+	tempDirFuncName   = "temp_dir"
 )
 
 var (
@@ -45,18 +45,18 @@ func LoadModule() (starlark.StringDict, error) {
 			"os": &starlarkstruct.Module{
 				Name: "os",
 				Members: starlark.StringDict{
-					ChdirFuncName:     starlark.NewBuiltin(ChdirFuncName, Chdir),
-					GetwdFuncName:     starlark.NewBuiltin(GetwdFuncName, Getwd),
-					SetenvFuncName:    starlark.NewBuiltin(SetenvFuncName, Setenv),
-					GetenvFuncName:    starlark.NewBuiltin(GetenvFuncName, Getenv),
-					WriteFileFuncName: starlark.NewBuiltin(WriteFileFuncName, WriteFile),
-					ReadFileFuncName:  starlark.NewBuiltin(ReadFileFuncName, ReadFile),
-					MkdirFuncName:     starlark.NewBuiltin(MkdirFuncName, Mkdir),
-					MkdirAllFuncName:  starlark.NewBuiltin(MkdirAllFuncName, MkdirAll),
-					RemoveFuncName:    starlark.NewBuiltin(MkdirFuncName, Remove),
-					RemoveAllFuncName: starlark.NewBuiltin(MkdirFuncName, RemoveAll),
-					RenameFuncName:    starlark.NewBuiltin(RenameFuncName, Rename),
-					TempDirFuncName:   starlark.NewBuiltin(TempDirFuncName, TempDir),
+					chdirFuncName:     starlark.NewBuiltin(chdirFuncName, Chdir),
+					getwdFuncName:     starlark.NewBuiltin(getwdFuncName, Getwd),
+					setenvFuncName:    starlark.NewBuiltin(setenvFuncName, Setenv),
+					getenvFuncName:    starlark.NewBuiltin(getenvFuncName, Getenv),
+					writeFileFuncName: starlark.NewBuiltin(writeFileFuncName, WriteFile),
+					readFileFuncName:  starlark.NewBuiltin(readFileFuncName, ReadFile),
+					mkdirFuncName:     starlark.NewBuiltin(mkdirFuncName, Mkdir),
+					mkdirAllFuncName:  starlark.NewBuiltin(mkdirAllFuncName, MkdirAll),
+					removeFuncName:    starlark.NewBuiltin(mkdirFuncName, Remove),
+					removeAllFuncName: starlark.NewBuiltin(mkdirFuncName, RemoveAll),
+					renameFuncName:    starlark.NewBuiltin(renameFuncName, Rename),
+					tempDirFuncName:   starlark.NewBuiltin(tempDirFuncName, TempDir),
 				},
 			},
 		}
@@ -77,7 +77,7 @@ func LoadModule() (starlark.StringDict, error) {
 func Chdir(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var dir string
 
-	err := starlark.UnpackArgs(ChdirFuncName, args, kwargs, "dir", &dir)
+	err := starlark.UnpackArgs(chdirFuncName, args, kwargs, "dir", &dir)
 	if err != nil {
 		return nil, err
 	}
@@ -113,7 +113,7 @@ func Setenv(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, k
 		value string
 	)
 
-	err := starlark.UnpackArgs(SetenvFuncName, args, kwargs, "key", &key, "value", &value)
+	err := starlark.UnpackArgs(setenvFuncName, args, kwargs, "key", &key, "value", &value)
 	if err != nil {
 		return nil, err
 	}
@@ -136,7 +136,7 @@ func Getenv(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, k
 		def string
 	)
 
-	err := starlark.UnpackArgs(GetenvFuncName, args, kwargs, "key", &key, "default?", &def)
+	err := starlark.UnpackArgs(getenvFuncName, args, kwargs, "key", &key, "default?", &def)
 	if err != nil {
 		return nil, err
 	}
@@ -171,7 +171,7 @@ func WriteFile(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple
 		perms    = 0644
 	)
 
-	err := starlark.UnpackArgs(WriteFileFuncName, args, kwargs, "filename", &filename, "content", &content, "perms?", &perms)
+	err := starlark.UnpackArgs(writeFileFuncName, args, kwargs, "filename", &filename, "content", &content, "perms?", &perms)
 	if err != nil {
 		return nil, err
 	}
@@ -195,7 +195,7 @@ func WriteFile(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple
 func ReadFile(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var filename string
 
-	err := starlark.UnpackArgs(ReadFileFuncName, args, kwargs, "filename", &filename)
+	err := starlark.UnpackArgs(readFileFuncName, args, kwargs, "filename", &filename)
 	if err != nil {
 		return nil, err
 	}
@@ -225,7 +225,7 @@ func Mkdir(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kw
 		perms = 0777
 	)
 
-	err := starlark.UnpackArgs(MkdirFuncName, args, kwargs, "name", &name, "perms?", &perms)
+	err := starlark.UnpackArgs(mkdirFuncName, args, kwargs, "name", &name, "perms?", &perms)
 	if err != nil {
 		return nil, err
 	}
@@ -250,7 +250,7 @@ func MkdirAll(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple,
 		perms = 0777
 	)
 
-	err := starlark.UnpackArgs(MkdirAllFuncName, args, kwargs, "path", &path, "perms?", &perms)
+	err := starlark.UnpackArgs(mkdirAllFuncName, args, kwargs, "path", &path, "perms?", &perms)
 	if err != nil {
 		return nil, err
 	}
@@ -270,7 +270,7 @@ func MkdirAll(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple,
 func Remove(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var name string
 
-	err := starlark.UnpackArgs(RemoveFuncName, args, kwargs, "name", &name)
+	err := starlark.UnpackArgs(removeFuncName, args, kwargs, "name", &name)
 	if err != nil {
 		return nil, err
 	}
@@ -291,7 +291,7 @@ func Remove(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, k
 func RemoveAll(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	var path string
 
-	err := starlark.UnpackArgs(RemoveAllFuncName, args, kwargs, "path", &path)
+	err := starlark.UnpackArgs(removeAllFuncName, args, kwargs, "path", &path)
 	if err != nil {
 		return nil, err
 	}
@@ -318,7 +318,7 @@ func Rename(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, k
 		newpath string
 	)
 
-	err := starlark.UnpackArgs(RenameFuncName, args, kwargs, "oldpath", &oldpath, "newpath", &newpath)
+	err := starlark.UnpackArgs(renameFuncName, args, kwargs, "oldpath", &oldpath, "newpath", &newpath)
 	if err != nil {
 		return nil, err
 	}
diff --git a/starlark/test/assert.go b/starlark/test/assert.go
index d4d3932..482a479 100644
--- a/starlark/test/assert.go
+++ b/starlark/test/assert.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package starlarktest defines utilities for testing Starlark programs.
+// Package test defines utilities for testing Starlark programs.
 //
 // Clients can call LoadAssertModule to load a module that defines
 // several functions useful for testing.  See assert.star for its
@@ -61,7 +61,7 @@ var (
 func LoadAssertModule() (starlark.StringDict, error) {
 	once.Do(func() {
 		predeclared := starlark.StringDict{
-			"error":   starlark.NewBuiltin("error", error_),
+			"error":   starlark.NewBuiltin("error", errorFn),
 			"catch":   starlark.NewBuiltin("catch", catch),
 			"matches": starlark.NewBuiltin("matches", matches),
 			"module":  starlark.NewBuiltin("module", starlarkstruct.MakeModule),
@@ -101,7 +101,7 @@ func matches(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple,
 }
 
 // error(x) reports an error to the Go test framework.
-func error_(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
+func errorFn(thread *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
 	if len(args) != 1 {
 		return nil, fmt.Errorf("error: got %d arguments, want 1", len(args))
 	}
diff --git a/starlark/types/attribute.go b/starlark/types/attribute.go
index baa052c..4956a4b 100644
--- a/starlark/types/attribute.go
+++ b/starlark/types/attribute.go
@@ -46,6 +46,7 @@ var _ starlark.Indexable = &Attribute{}
 var _ starlark.Comparable = &Attribute{}
 
 // NewAttribute returns a new Attribute for a given value or block of a Resource.
+// The path is calculated traversing the parents of the given Resource.
 func NewAttribute(r *Resource, t cty.Type, name string) *Attribute {
 	var parts []string
 	var path string
@@ -80,6 +81,7 @@ func NewAttribute(r *Resource, t cty.Type, name string) *Attribute {
 	return NewAttributeWithPath(r, t, name, path+"."+name)
 }
 
+// NewAttributeWithPath returns a new Attribute for a given value or block of a Resource.
 func NewAttributeWithPath(r *Resource, t cty.Type, name, path string) *Attribute {
 	return &Attribute{
 		r:       r,
@@ -95,6 +97,7 @@ func (c *Attribute) Type() string {
 	return fmt.Sprintf("Attribute<%s>", MustTypeFromCty(c.t).Starlark())
 }
 
+// InnerType returns the inner Type represented by this Attribute.
 func (c *Attribute) InnerType() *Type {
 	t, _ := NewTypeFromCty(c.t)
 	return t