Seam dossier

Support-Level Boundary Packages

Some packages are visible in registries or release machinery but are not framed as normal public developer entry points.

mixed visible package with limited public support confidence high
public surface: generated namespace packagespublic surface: lower-level registry artifacts

This pattern matters because it shows package visibility is not the same thing as supportability. A package being on npm does not automatically make it a public contract.

Evidence

Why this seam matters