MHS saves weeks by turning hardware integration into a software change — and under the EU Machinery Regulation, a software change to a machine's safety behaviour can make whoever performed it the legal manufacturer. Whether that fires on any given install is currently undecidable from public information, because Anthropic has not published the spec.
Anthropic's Model Hardware Standard says agents' safety limits will be "enforced," but never says whether that means clamped in code or written in a sentence a model has to honor. The distinction reaches Europe first: the manufacturers on Anthropic's own vendor list will need conformity assessments under an EU regulation that starts covering AI-based safety functions in January 2027.