vercel__workflow/.changeset/pre/module-scope-state-all-bundled-packages.md

@workflow/core, @workflow/world, @workflow/ai, @workflow/nest

@workflow/core	@workflow/world	@workflow/ai	@workflow/nest
patch	patch	patch	patch

Hold process-wide state on globalThis rather than at module scope in the packages that get bundled into the host application's server build, where a bundler compiles one copy of each module per layer. Covers warn-once latches, lazy caches, the VM script and QuickJS asset caches, the dev-server port cache, and step single-flight, whose per-copy map was not actually single-flight. State that is deliberately per-copy is annotated with the reason.