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This is not about add-on

This is not about add-on library, but about data.
To replicate in-camera rendering you need to use:
a) same color profile (as used by camera firmware)
b) same exposure (midtone) compensation
c) same contrast curve

AFAIK, such data is not published by vendors. Generally, it is possible to measure this data using test shots (separate measure for each camera you want to support).

-- Alex Tutubalin @LibRaw LLC