Pass the merchant's direction to the Brain. Use `add_instruction` when they state a standing goal or guardrail ("stop di

Pass the merchant's direction to the Brain. Use add_instruction when they state a standing goal or guardrail ("stop discounting", "focus on the winter range", "never advertise brand X", "keep spend under 40 a day") — the Brain reads these on every cycle and treats a guardrail as a hard constraint that overrides its own judgement. Use remove_instruction with the EXACT wording of an existing one when they retract it; call get_brain_thinking first and read the list back to them. Use note for a one-off fact the next cycle should know ("we are out of stock on the Aurelle line until Friday") that should not become a permanent rule. ALWAYS confirm the wording with the merchant before writing it — this changes what an autonomous system does with their money. It cannot change budgets, modes, autonomy or caps, and it cannot approve or dispatch anything.