diff --git a/skylab/make_skylab.go b/skylab/make_skylab.go
index 80d18a2..483d15e 100644
--- a/skylab/make_skylab.go
+++ b/skylab/make_skylab.go
@@ -284,8 +284,6 @@ func main() {
 	// then we need to make a header template.
 	v := &SkylabFile{}
 
-	fmt.Printf("running %s on %s\n", os.Args[0], os.Getenv("GOFILE"))
-
 	basePath, err := filepath.Abs(os.Args[1])
 	if err != nil {
 		panic(err)
diff --git a/skylab/skylab_gen.go b/skylab/skylab_gen.go
index d90023d..a3864f4 100644
--- a/skylab/skylab_gen.go
+++ b/skylab/skylab_gen.go
@@ -1,4 +1,4 @@
-// generated by gen_skylab.go at 2023-05-20 12:46:09.664376329 -0500 CDT m=+0.002839937 DO NOT EDIT!
+// generated by gen_skylab.go at 2023-05-22 08:37:01.7251166 -0500 CDT m=+0.002980842 DO NOT EDIT!
 
 package skylab
 
@@ -232,6 +232,8 @@ var idMap = map[uint32]bool{
 	0x117: true,
 }
 
+// FromCanFrame creates a Packet from a given CAN ID and data payload.
+// If the CAN ID is unknown, it will return an error.
 func FromCanFrame(id uint32, data []byte) (Packet, error) {
 	if !idMap[id] {
 		return nil, errors.New("Unknown Id")
@@ -1554,7 +1556,7 @@ type BmsModule struct {
 	// 1 C
 	Temperature float32 `json:"temperature"`
 	// Idx is the packet index. The accepted range is 0-36
-	Idx uint32
+	Idx uint32 `json:"idx"`
 }
 
 func (p *BmsModule) CANId() (uint32, error) {
@@ -2541,7 +2543,7 @@ func (p *VisionRearviewCommand) String() string {
 type TrackerEnable struct {
 	Enable uint8 `json:"enable"`
 	// Idx is the packet index. The accepted range is 0-6
-	Idx uint32
+	Idx uint32 `json:"idx"`
 }
 
 func (p *TrackerEnable) CANId() (uint32, error) {
@@ -3631,7 +3633,7 @@ type TrackerData struct {
 	// 0.01 C
 	Temperature uint16 `json:"temperature"`
 	// Idx is the packet index. The accepted range is 0-6
-	Idx uint32
+	Idx uint32 `json:"idx"`
 }
 
 func (p *TrackerData) CANId() (uint32, error) {
diff --git a/skylab/templates/golang.go.tmpl b/skylab/templates/golang.go.tmpl
index d09e9ec..9cbc497 100644
--- a/skylab/templates/golang.go.tmpl
+++ b/skylab/templates/golang.go.tmpl
@@ -41,7 +41,7 @@ type {{$structName}} struct {
 {{- end}}
 {{- if .Repeat }}
 	// Idx is the packet index. The accepted range is 0-{{.Repeat}}
-	Idx uint32
+	Idx uint32 `json:"idx"`
 {{- end }}
 }
 
@@ -110,6 +110,8 @@ var idMap = map[uint32]bool{
 	{{- end}}
 }
 
+// FromCanFrame creates a Packet from a given CAN ID and data payload.
+// If the CAN ID is unknown, it will return an error.
 func FromCanFrame(id uint32, data []byte) (Packet, error) {
 	if !idMap[id] {
 		return nil, errors.New("Unknown Id")