What Delphi coding standards document(s) do you follow?

Project JEDI Delphi Language Style Guide With JCL Additions

(An extension of CodeGear’s “Object Pascal Style Guide”)

https://wiki.delphi-jedi.org/wiki/Project_JEDI_Delphi_Language_Style_Guide

(Thanks to Jeroen Pluimers and AmigoJack for reporting that the old links had died. And in case this latest link also dies, here's its Internet Archive link, for good measure.)

CodeGear’s “Object Pascal Style Guide”

http://edn.embarcadero.com/article/10280

Econos – Coding Standard Document

(Subtitled “Delphi 4 Developer's Guide Coding Standards Document”.)

http://www.econos.de/delphi/cs.html