Did not check api changes for a while…
1) 
Looks like “buff” stats were added to main items stats except “agony resistance”. 
For example https://api.guildwars2.com/v2/items?ids=49403
Before
+94	Power
+67	Precision
+67	Ferocity
… and buff
+32 Power
+18 Ferocity
+18 Precision
+5 Agony Resistance
Now 
+126 Power
+85	Precision
+85	Ferocity
… and buff
+32 Power
+18 Ferocity
+18 Precision
+5 Agony Resistance
No “agony resistance” attribute in main list :/ In same time i see new agony resistance attribute for new items like https://api.guildwars2.com/v2/items?ids=39616
Need to add agony resistance to main attributes list i think so we can ignore “buff” description. Is it a bug or what?
2)
Where can i read about last items api changes?
                                 
                                
                                    English is not my native language, sorry :<