When does Yasuo the Remorseful's ability apply in combat timing, and does it trigger before or after defender abilities and shield?

Ruling: Yasuo the Remorseful's "when I attack" ability is a regular trigger that goes on the chain with other "when I attack" abilities. It triggers before "when I defend" abilities but resolves after them (due to chain resolution order). Passive abilities like shield activate instantly when combat starts, before any triggers.

Sequence:

• Combat starts
• Passive abilities (like shield) activate instantly
• "When I attack" triggers (including Yasuo) are added to the chain
• "When I defend" triggers are added to the chain
• Chain resolves in reverse order: "when I defend" abilities resolve first, then "when I attack" abilities resolve

Nuances:

• Yasuo the Remorseful's ability opens/adds to the chain and can be reacted to
• Shield cannot be reacted to as it activates instantly