Specifications
Here you'll find official specifications published by the AROS Development Team. These will document aspects like policies that system-friendly applications are expected to follow, extensions to the original AmigaOS API and other technical details specific to AROS.
Currently, no final specifications have been published, but listed below are a number of drafts that are available for discussion.
Drafts
The documents listed here are draft specifications, and as such will most likely change before they are accepted as official specifications. They might also be deprecated if a better approach has been found in the mean time, and don't necessarily correspond precisely with the current implementations.