Started in
3.5 Monster Manual for select monsters with round by round tactics. Narrative combat notes were in a bunch of edition monster descriptions to one degree or another.
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You could see this in late 3.5 starting with
Monster Manual IV
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3.0 had the first full sourcebook on it, the
Epic Level Handbook.
1e had the first module for characters over 20th level with
H4 The Throne of Bloodstone for characters levels 18-100.
New to 4e.
Arcane divine had been pretty much a split of powers from the beginning. People came up with core four roles early on (not in the same terms or fully the same concepts though, stuff like healer and skill monkey) but as actual explicit game mechanics that was 4e.
I believe that started showing up as a monster mechanic in late 3.5
Monster Manual V in some individual monsters.
Casters always had new magic every couple of levels, and 3.5 worked hard at getting rid of dead levels where you gained nothing but HD, attack, skill, and save advancement, but you'd have to go to
d20 Modern for a solid everybody picking powers each level 4e precursor. (I couldn't say for Saga Star Wars).
Most all editions were easy to hack in a number of ways.
These were fairly 4e specific.