TerminalText

Output written for a terminal, as a terminal shows it: the control functions of ECMA-48 (ISO/IEC 6429, "ANSI escape codes") in the subset xterm-compatible programs use for their output, applied to a screen of lines with a cursor.

• C0 controls: \n (new line), \r (back to the start of the line, so progress bars redraw in place), \b (back one column), \t (tab stops every 8 columns); others are dropped.

• CSI: SGR m (bold, dim, italic, underline, blink as nothing, inverse, conceal, strike, the 16 colors and their bright forms, 256-color 38;5;n and true color 38;2;r;g;b, in ; or : form, foreground and background); erase in line K and in display J; cursor up / down / forward / back A B C D, next / previous line E F, column G, position H / f (rows relative to the first line of the output). Private modes (?25l…) and the rest are ignored.

• OSC: 8 hyperlinks (OSC 8, as in iTerm2, GNOME Terminal and Windows Terminal) become Style.link; other OSC strings (window titles…) are dropped. Other escape sequences are dropped.

UI elements render lines with their styles; plain is what the terminal would show as text, e.g. for a model, which should not pay for escape codes and redrawn progress bars.