module BannerFontGlyphs

BannerFontGlyphs — cap-band half-block letter art (3 IRC rows → 8 pixel rows via BannerFont). Reference cap rows from opencode --help (OPENCODE); BannerFont prepends an ascender row for 4 IRC lines. Spaces in rows become dot fill via BannerFont.normalize_glyph_row. Tests: test/lib/banner_font_test.rb