The cosmos clock is an object holding the current step number, the fixed delta time and the entity guid to be assigned to the next created entity.
It is a part of the cosmos’s solvable significant.

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Fixed delta

The field cosmos_clock::delta is used by solvers to determine the amount of time by which to move the game state forward in time.
The behaviour is undefined if the delta is less or equal than 0 (in other words, equal to delta::zero).