v0.5.66

• Browser worker messaging globals stay guest-local; trusted host transports retain their native methods. File entries use the normal image-prepared module loader and keep Node main-module identity (ADR-0004).
• A thread whose native Worker authority is withheld can initialize the child_process builtin; speculative synchronous-child warming no longer aborts its entry. An actual synchronous spawn retains the original constructor refusal.
• Give global and worker_threads MessagePorts real per-process loop references: the first message listener refs/starts its real transport, unref releases its hold, and close/process teardown releases and closes it (ADR-0004).