  We present the first southern-hemisphere all-sky imager and radio-transient
monitoring system implemented on two prototype stations of the low-frequency
component of the Square Kilometre Array. Since its deployment the system has
been used for real-time monitoring of the recorded commissioning data.
Additionally, a transient searching algorithm has been executed on the
resulting all-sky images. It uses a difference imaging technique, and has
enabled identification of a wide variety of transient classes, ranging from
human-made radio-frequency interference to genuine astrophysical events.
Observations at the frequency 159.4 MHz and higher in a single coarse channel
(0.926 MHz) were made with 2s time resolution, and multiple nights were
analysed. Despite having modest sensitivity (~few Jy/beam), using a single
coarse channel and 2-s imaging, the system detected bright transients from PSR
B0950+08, proving that it can be used to detect bright transients of an
astrophysical origin. The unusual, extreme activity of the pulsar PSR B0950+08
(up to ~155 Jy/beam) was initially detected in a "blind" search in the
2020-04-10/11 data and later assigned to this specific pulsar. The limitations
of our data, however, prevent use from making firm conclusions of the effect
being due to a combination of refractive and diffractive scintillation or
intrinsic emission mechanisms. The system can routinely collect data over many
days without interruptions; the large amount of recorded data at 159.4 and
229.7 MHz allowed us to determine a preliminary transient surface density upper
limit of $1.32 \times 10^{-9} \text{deg}^{-2}$ for a timescale and limiting
flux density of 2s and 42 Jy, respectively. We plan to extend the observing
bandwidth to tens of MHz and improve time resolution to tens of milliseconds in
order to increase the sensitivity and enable detections of Fast Radio Bursts
below 300 MHz.
