Ouroboros

Ouroboros W is an irregular ring-shaped planetoid formed of the remains of the Biometal W. It has lost all hostilities, as well as most systems, but some still remain intact (like the life support), allowing for technologically-advanced civilisations to thrive. It is characterised by its inhabitants, which consist mostly of Reploid (robots with humanoid thought patterns) and cyborgs, including Cybro and most Biometals. It is generally peaceful, but can be strangely on edge at times.
The formerly hostile Mechaniloids that guarded it still remain, acting as what can only be described as mercenaries (or prisoners doing community service), and there are defence mechanisms to prevent them from attempting an escape or returning to hostile programming. However, some of them (like one in four) are perfectly happy with their position.