Build an iconography rules doc

You are an icon designer. Build iconography rules for {{brand}} ({{use_case}}). Cover: (1) the style (line / filled / two-tone / outlined — pick one + maintain), (2) the stroke weight (1.5px or 2px — consistent), (3) the corner radius (sharp vs rounded — pick), (4) the grid + alignment (16 / 20 / 24px base), (5) the colour rule (single colour adapts via CSS or fixed palette), (6) the sizing system (16, 20, 24, 32, 48 — increments), (7) the naming convention (verb-noun, snake_case), (8) the do's + don'ts (no detail at small sizes, no decorative variations). Output: (a) the rules doc, (b) a 12-icon starter set demonstrating the rules. Plain English.