nx_browser_buyguard.nx

nx_browser_buyguard.nx -- the Nishi BROWSER's "before you buy" pass, on REAL page HTML (operator: "part of the nishi browser ... showing what you have vs what it will cost and help with the opportunity costs"). Composes the browser's ACTUAL pipeline organ nx_html_to_text (fetch -> html_to_text -> render): the browser hands this the page HTML; the pass strips it to text (the real renderer path), finds the price (px_find_price), runs the grounded purchase-decision engine (nx_purchase: opportunity cost EXACT via nx_debt), and emits a zero-JS overlay the browser shows -- WHAT YOU HAVE vs WHAT IT TRULY COSTS. Advisory only (autonomy). No price on the page -> ALLOW + empty overlay (does nothing). license_tier: ORIGINAL