diff --git a/cmd/smsgwhookstocsv/go.mod b/cmd/smsgwhookstocsv/go.mod
new file mode 100644
index 0000000..1fdaf87
--- /dev/null
+++ b/cmd/smsgwhookstocsv/go.mod
@@ -0,0 +1,5 @@
+module github.com/therootcompany/golib/cmd/smsgwhookstocsv
+
+go 1.25.0
+
+require github.com/jszwec/csvutil v1.10.0
diff --git a/cmd/smsgwhookstocsv/go.sum b/cmd/smsgwhookstocsv/go.sum
new file mode 100644
index 0000000..6a61a22
--- /dev/null
+++ b/cmd/smsgwhookstocsv/go.sum
@@ -0,0 +1,2 @@
+github.com/jszwec/csvutil v1.10.0 h1:upMDUxhQKqZ5ZDCs/wy+8Kib8rZR8I8lOR34yJkdqhI=
+github.com/jszwec/csvutil v1.10.0/go.mod h1:/E4ONrmGkwmWsk9ae9jpXnv9QT8pLHEPcCirMFhxG9I=
diff --git a/cmd/smsgwhookstocsv/main.go b/cmd/smsgwhookstocsv/main.go
new file mode 100644
index 0000000..5111363
--- /dev/null
+++ b/cmd/smsgwhookstocsv/main.go
@@ -0,0 +1,133 @@
+// smsgwhooks-to-tsv - Converts messages.jsonl webhook events to TSV/CSV
+//
+// Authored in 2026 by AJ ONeal <aj@therootcompany.com>, assisted by Grok Ai.
+// To the extent possible under law, the author(s) have dedicated all copyright
+// and related and neighboring rights to this software to the public domain
+// worldwide. This software is distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with
+// this software. If not, see <https://creativecommons.org/publicdomain/zero/1.0/>.
+package main
+
+import (
+	"encoding/csv"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+
+	"github.com/jszwec/csvutil"
+)
+
+type SmsReceivedPayload struct {
+	Message     string `json:"message"     csv:"message"`
+	MessageID   string `json:"messageId"   csv:"messageId"`
+	PhoneNumber string `json:"phoneNumber" csv:"phoneNumber"`
+	ReceivedAt  string `json:"receivedAt"  csv:"receivedAt"`
+	SimNumber   int    `json:"simNumber"   csv:"simNumber"`
+}
+
+type WebhookEvent struct {
+	DeviceID   string             `json:"deviceId"    csv:"deviceId"`
+	Event      string             `json:"event"       csv:"event"`
+	ID         string             `json:"id"          csv:"id"`
+	Payload    SmsReceivedPayload `json:"payload"     csv:",inline"`
+	WebhookID  string             `json:"webhookId"   csv:"webhookId"`
+	XSignature string             `json:"x-signature" csv:"x-signature"`
+	XTimestamp int64              `json:"x-timestamp" csv:"x-timestamp"`
+}
+
+type MainConfig struct {
+	out   string
+	comma string
+	in    string
+}
+
+func main() {
+	cfg := MainConfig{}
+
+	fs := flag.NewFlagSet("smsgwhooks-to-tsv", flag.ExitOnError)
+
+	fs.StringVar(&cfg.out, "o", "-", "output file ('-' = stdout)")
+	fs.StringVar(&cfg.comma, "comma", "\t", "field separator (default: tab)")
+
+	fs.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: jsonl-to-tsv [flags] [input.jsonl]\n")
+		fmt.Fprintf(os.Stderr, "\n")
+		fmt.Fprintf(os.Stderr, "Converts JSONL webhook events to TSV (or CSV with custom separator).\n")
+		fmt.Fprintf(os.Stderr, "\n")
+		fmt.Fprintf(os.Stderr, "Flags:\n")
+		fs.PrintDefaults()
+		fmt.Fprintf(os.Stderr, "\n")
+		fmt.Fprintf(os.Stderr, "Examples:\n")
+		fmt.Fprintf(os.Stderr, "  jsonl-to-tsv messages.jsonl\n")
+		fmt.Fprintf(os.Stderr, "  cat messages.jsonl | jsonl-to-tsv -\n")
+		fmt.Fprintf(os.Stderr, "  jsonl-to-tsv -o ./out.tsv messages.jsonl\n")
+		fmt.Fprintf(os.Stderr, "  jsonl-to-tsv --comma , -o ./out.csv messages.jsonl\n")
+		fmt.Fprintf(os.Stderr, "  jsonl-to-tsv -o - messages.jsonl           # explicit stdout\n")
+	}
+
+	_ = fs.Parse(os.Args[1:])
+
+	fi, _ := os.Stdin.Stat()
+	isProbablyPipe := (fi.Mode() & os.ModeCharDevice) == 0
+	if fs.NArg() == 0 && !isProbablyPipe {
+		fs.Usage()
+		os.Exit(1)
+	}
+
+	var in io.Reader = os.Stdin
+	if cfg.in = fs.Arg(0); cfg.in != "" && cfg.in != "-" {
+		f, err := os.Open(cfg.in)
+		if err != nil {
+			log.Fatalf("open input: %v", err)
+		}
+		defer func() { _ = f.Close() }()
+		in = f
+	}
+
+	var out io.Writer = os.Stdout
+	if cfg.out != "-" {
+		f, err := os.Create(cfg.out)
+		if err != nil {
+			log.Fatalf("create output: %v", err)
+		}
+		defer func() { _ = f.Close() }()
+		out = f
+	}
+
+	csvWriter := csv.NewWriter(out)
+	csvWriter.Comma = rune((cfg.comma)[0])
+	csvWriter.UseCRLF = false
+
+	enc := csvutil.NewEncoder(csvWriter)
+
+	// write header
+	_ = enc.EncodeHeader(WebhookEvent{})
+
+	dec := json.NewDecoder(in)
+	for dec.More() {
+		var evt WebhookEvent
+		if err := dec.Decode(&evt); err != nil {
+			if err == io.EOF {
+				break
+			}
+			log.Printf("decode error, skipping: %v", err)
+			continue
+		}
+		if evt.Event != "sms:received" {
+			continue
+		}
+
+		if err := enc.Encode(evt); err != nil {
+			log.Fatalf("encode error: %v", err)
+		}
+	}
+
+	csvWriter.Flush()
+	if err := csvWriter.Error(); err != nil {
+		log.Printf("flush error: %v", err)
+	}
+}