[marshray]

> On 21 July 2017, bitcoin miners locked-in a software upgrade referred to as Bitcoin Improvement Proposal (BIP) 91

> By 8 August, another milestone was reached when 100% of the bitcoin mining pools signaled support

https://en.wikipedia.org/wiki/SegWit#Activation

[tylersmith]

That's signaling, built into the end users fully-validating nodes, to coordinate between the miners producing blocks and nodes validating them. The validating nodes are the ones that offered up and then accepted the signaling.

[garydevenay]

Signalling is not consensus I’m afraid…