nx_ferment_process.nx

nx_ferment_process.nx -- R2 process rung: the ferment state machine. A fermentation recipe is a SEQUENCE OF PHASES, each with a target temperature (for the R1 thermal controller) and an exit condition (temperature reached, pH reached, or time elapsed). This is the yogurt-maker / cheesemaker LOGIC: pasteurize -> cool -> inoculate -> ferment-hold -> chill (yogurt); ripen -> rennet -> cut -> cook -> drain -> press -> age (cheese). One generic executor, data-driven per Rule 6/11 -- the phase table is data, not code. SAFETY COMPOSITION: every phase flagged is_ferment passes through the R0 never-poison law (nx_ferment_validate) BEFORE its exit is checked. Any refusal HALTS the whole process (status = HALTED_UNSAFE) and records the verdict. The never-poison law thus propagates up the ladder -- an unsafe batch can never run to "done". Non-ferment phases (e.g. the 82 C pasteurization, which is above culture-kill) are NOT validated by the ferment law -- no culture is present yet, so culture-kill does not apply. That separation is why nx_ferment_validate documents itself as the ferment-HOLD predicate. genealogy_id: nishi_ferment_safety_envelope_2026 (via nx_ferment_safety) + state_machine_recipe_executor_pattern