Chainguard most likely interpreted Calif's dancing anime girl video as a script kiddie who had found a POC.

Can you blame them? Calif's unbelievably unprofessional video's leak definitely spikes the cortisol of any actual professional.

It sounds like there was no "co-ordination" behind any of this co-ordinated disclosure. You'd have expected there to be an IRC channel, a mailing list, a Slack chat, or something for something of this scale.

Was there even an incident co-ordinator here? Was any of the parties talking to each other?

And then decided to not ask the PHP foundation about it?