Boyd virtually never uses the word “agile,” but it’s hard to read any of his presentations without running across concepts that seem like agility.

For example, you’ll find this right at the beginning of Patterns of Conflict:

Idea of fast transients suggests that, in order to win, we should operate at a faster tempo or rhythm than our adversaries—or, better yet, get inside adversary’s observation-orientation-decision-action time cycle or loop. (5)

“Fast transients,” “operate at a faster tempo or rhythm,” “get inside adversary’s observation-orientation-decision-action time cycle or loop” (whatever that means) certain have that agile feel.

Then a few pages over:

It is advantageous to possess a variety of responses that can be applied rapidly to gain sustenance, avoid danger, and diminish adversary’s capacity for independent action. (12)

“A variety of responses that can be applied rapidly,” sounds pretty agile (note that it is the application, not the responses themselves…