Tooltips

Tooltips (net.satisfy.foundation.tooltip)

Info tooltips

One line per item – no appendHoverText overrides needed.

InfoTooltip.of(MY_SHELF.get())
        .placeable()                              // "Can be placed"
        .line("tooltip.mymod.fits_on_wall")       // any extra gray line
        .details(2)                               // "[SHIFT] for more" → 2 lines
        .when(MyConfig::itemTooltips)             // optional switch from your config
        .register();

details(n) reads the keys tooltip.<modid>.<item_path>.info_0 … info_{n-1} from your lang file:

"tooltip.mymod.shelf.info_0": "Right-click with an item to put it on the shelf.",
"tooltip.mymod.shelf.info_1": "Right-click with an empty hand to take it back."

The generic texts (tooltip.foundation.canbeplaced, tooltip.foundation.hold_shift) come from Foundation.

Coloured tooltip borders

TooltipBorder.markSoul();                 // cyan, e.g. soul-fire food
TooltipBorder.markHot();                  // orange-red, e.g. something hot
TooltipBorder.mark(0xF0FFD700, 0xF0886600); // any gradient (top, bottom), ARGB

Call it while the tooltip is being built (e.g. inside a ClientTooltipEvent listener or appendHoverText). The mark applies to the next tooltip frame only, so nothing needs to be reset.