Why this term exists
Stability is often mistaken for resistance to change. Coherence gives a stronger criterion: the system may change substantially while preserving enough relation to remain functional and recognizable.
Definition in the system
Coherence is the load-bearing condition across MonkOS, Semonika and Trajon Theory. Signal requires it, Relatio depends on it, Detraction is limited by it, and Trajnica persists through it.
The framework therefore treats stability as a property of a change-capable frame rather than a frozen state. A stable frame accepts meaningful change while preserving enough internal relation for change to become form.
Operational coherence can be examined at different scales: conceptual, temporal, organizational, physiological or computational. The measurements need to be chosen for the domain rather than assumed to be interchangeable.
Example
A jazz ensemble changes notes continuously while preserving enough timing, harmonic relation and mutual attention for the performance to remain one coherent piece.