GitHub's rollout of staged publishing on npm introduces a critical friction point into the software supply chain by requiring explicit 2FA approval for every release, even those originating from CI/CD pipelines or OIDC-trusted publishing. This directly confronts the self-reinforcing compromise cycles exploited by groups like TeamPCP, who have weaponized package poisoning at scale across ecosystems. Unlike prior reactive patches after incidents such as the 2024 XZ Utils backdoor or repeated PyPI hijackings, npm's approach embeds proof-of-presence at the registry level, forcing attackers to breach maintainer accounts rather than simply compromising build scripts. The accompanying install-source flags (--allow-file, --allow-remote, --allow-directory) extend explicit allowlisting beyond the existing --allow-git, closing off common vectors for local and remote tarball abuse that mainstream reporting has largely overlooked. Synthesizing patterns from the SolarWinds supply chain breach and ongoing npm ecosystem telemetry, these controls represent a structural shift toward hybrid human-automated verification, though they leave new-package creation unprotected and require CLI updates that may lag in enterprise environments. By pairing staged publishing with OIDC, GitHub mitigates token theft risks prevalent in prior attacks, yet the mandate for pre-existing packages highlights a gap for emerging projects most vulnerable to initial seeding.