"Let me explain what this actually solves: You merge a PR. CI passes. You deploy. Three days later someone asks 'was this build identical to what was tested?' You have no answer. ISC Core gives you that answer. Every artifact gets a hash at the CI boundary. If anything drifts — canonicalization, policy, anything — promotion is blocked before it hits prod. 60 seconds to verify. Works offline. No vendor dependency. What problem are you solving around build reproducibility right now?"