orion-ecs / keen-eye / 19983104067

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github

Add World.Add<T>(entity, component) for runtime component addition

Implements issue #54: allows dynamically adding components to existing
entities after creation. The method validates entity is alive, prevents
duplicate components (throws with guidance to use Set<T> instead), and
automatically registers unregistered component types.

Added entities are correctly matched by queries requiring the new component.
Comprehensive test coverage includes success paths, error handling,
query integration, and edge cases (23 tests).

10 of 11 new or added lines in 1 file covered. (90.91%)

303 of 656 relevant lines covered (46.19%)

0.46 hits per line