Function dodge_tick_key

pub fn dodge_tick_key(index: usize) -> String

Tick + 1 of the index-th most recent Core Dodge (0 = the current one); 0 means “no such dodge yet” (TR-L02).

A ring of ticks rather than a tumbling-window counter: the condition is “N dodges inside the last W ticks”, which the actual times answer without an edge case at the window boundary.