building-a-package

Use when building a library package with effected package build and its optional effected.toml, or reading what a build left in dist/prod: every [package.build] key, publish groups from publishConfig.targets, copy, plugins, looseFiles, outSubdir overrides, exe, manifest drop/set, the workspace wiring (links to src/, nodeOptions tsx, the effected-built condition), and reading dist/prod/issues.json with buildOk first.