A well-answered question here: FIDE Laws of Chess pre-2017 asks for locations of historical sets of FIDE Laws. I am asking for something which partially builds on that.
Is there a timeline of "key" historical changes to rules (FIDE, USCF and earlier) & the WFCC Codex of Chess Problem Conventions, please? It's not going to be perfect initially or ever, but something which can grow.
Having such an artifact would allow us to assign a historical context to those chess compositions that riff on specific rules and conventions, for example: Dummy Pawn, Bosma theme, Dead Reckoning, Retro Strategy & Partial Retro-Analysis. This would be a general foundation for specific timelines listing relevant compositions themselves, e.g. the one at When (if ever) was it a rule that pawn promotion was optional?