⚡ TL;DR: Most of your production code is dependencies you didn't write, so the supply chain is the attack surface. Shift security left with SBOMs, signing and provenance via Sigstore, the SLSA levels, and least-privilege CI. Contents You didn't write most of your production code Shift left: security in the pipeline, not after it SBOM: an ingredients label for your software Signing and provenance: prove it's really yours SLSA: a maturity ladder for your build Lea...