  While the collective motion of active particles has been studied extensively,
effective strategies to navigate particle swarms without external guidance
remain elusive. We introduce a method to control the trajectories of
two-dimensional swarms of active rod-like particles by confining the particles
to rigid bounding membranes (vesicles) with non-uniform curvature. We show that
the propelling agents spontaneously form clusters at the membrane wall and
collectively propel the vesicle, turning it into an active superstructure. To
further guide the motion of the superstructure, we add discontinuous features
to the rigid membrane boundary in the form of a kinked tip, which acts as a
steering component to direct the motion of the vesicle. We report that the
system's geometrical and material properties, such as the aspect ratio and
Peclet number of the active rods as well as the kink angle and flexibility of
the membrane, determine the stacking of active particles close to the kinked
confinement and induce a diverse set of dynamical behaviors of the
superstructure, including linear and circular motion both in the direction of,
and opposite to, the kink. From a systematic study of these various behaviors,
we design vesicles with switchable and reversible locomotions by tuning the
confinement parameters. The observed phenomena suggest a promising mechanism
for particle transportation and could be used as a basic element to navigate
active matter through complex and tortuous environments.
