Works on Minecraft 26.3 (and 1.21.11).
Hullspark Coordinate HUD adds a single, unobtrusive line at the top of the screen: facing direction (8-point compass and bearing in degrees), your block coordinates, and the horizontal distance to the world spawn. Height is not counted, so standing right above or below spawn reads as 0m.
It draws no minimap, so it does not compete with map mods such as Xaero's, and it stays clear of the hotbar.
The line sits at the top center of the screen. When one or more boss bars are shown, it moves below them instead of covering the boss name. It hides while another screen (inventory, chest, death screen, menus) is open, and stays visible while you type in chat so you can read your coordinates out.
Disclosure: this mod was developed with AI assistance (Claude) and reviewed by the author. It does not reuse code or assets from other mods. Client-side only; it does not collect or transmit any data.