Initial, working but only with viewport height adjusted a little bit

internal/bridge/protocol.go

@@ -0,0 +1,42 @@
+package bridge
+
+import (
+	"encoding/json"
+	"maps"
+	"math/rand"
+)
+
+type CommandType string
+
+const (
+	ContinueCommand CommandType = "continue"
+	BreakCommand    CommandType = "break"
+	LocalsCommand   CommandType = "locals"
+)
+
+func makeCommand(cmd CommandType, values map[string]any) (requestId string, request string) {
+	m := make(map[string]any, len(values)+2)
+	maps.Copy(m, values)
+
+	requestId = randString(8)
+
+	m["cmd"] = cmd
+	m["request_id"] = requestId
+
+	b, err := json.Marshal(m)
+	if err != nil {
+		panic("failed to marshal command " + err.Error())
+	}
+
+	return requestId, string(b)
+}
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+func randString(n int) string {
+	b := make([]byte, n)
+	for i := range b {
+		b[i] = letterBytes[rand.Intn(len(letterBytes))]
+	}
+	return string(b)
+}