Software supply chain security used to feel like a problem that lived somewhere else. The repository and build system were top of mind. Package registries, continuous integration and continuous delivery pipelines, release automation, cloud platforms, and artifact stores also became the focus of concern. These still matter and need protection, but the attack surface has shifted closer to where developers work every day. The developer laptop is no longer just the place where code gets written. It is part of the supply chain. The security implications are easy to underestimate. A modern workstation touches source code, package managers, cloud accounts, registry tokens, secure shell keys, service accounts, build scripts, artificial intelligence coding assistants, terminals, local caches, and environment files. It is where credentials are created, copied, tested, logged, and too often forgotten. Attackers understand this. They are not only looking for a vulnerable production service or a poisoned build step.…