Agent retries on connection loss, sends connection info (v4 v6) Uses system CA for mTLS. Removed server endpoints.

agent/internal/client/errors.go

@@ -0,0 +1,36 @@
+package client
+
+import (
+	"context"
+	"errors"
+	"net"
+)
+
+type HTTPStatusError struct {
+	StatusCode int
+	Status     string
+}
+
+func (e *HTTPStatusError) Error() string {
+	return "remote status " + e.Status
+}
+
+func IsRetriable(err error) bool {
+	if err == nil {
+		return false
+	}
+	var statusErr *HTTPStatusError
+	if errors.As(err, &statusErr) {
+		switch statusErr.StatusCode {
+		case 404, 408, 429, 500, 502, 503, 504:
+			return true
+		default:
+			return false
+		}
+	}
+	if errors.Is(err, context.DeadlineExceeded) {
+		return true
+	}
+	var netErr net.Error
+	return errors.As(err, &netErr)
+}