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This is a terminology question. Is there a standard name for a diagram in a relative category with a property that its colimit exists and is already a homotopy colimit? Those of course include diagrams which are cofibrant with respect to some compatible model structure on diagrams (if one happens to exist). However, in some categories there are such diagrams which don’t seem to come from any notion of cofibration, so it would be convenient to have a nice name for them.
Sometimes people say that some 1-categorical structure is “homotopy-good” if some universal construction on it yields the correct homotopy-theoretic result.
Or perhaps more specifically “colim-good” to specify the functor in question, or maybe “colim-cofibrant”.
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