node

var SigningCapabilityProbe = func(ctx context.Context, baseURL string) (bool, error) {
	caps, err := api.Capabilities(ctx, baseURL)
	if err != nil {
		return false, err
	}
	return caps["node-signing"], nil
}

SigningCapabilityProbe answers whether the server advertises the `node-signing` switch. Its failure reads as "not advertised".

Package-level so command tests can inject a fake (house convention).