gods-eye-view/changelog.d/1686-cockpit-subjects.md

• Let an application add its own Cockpit subjects through services.cockpitSubjects. A provider supplies the subject's position, heading and HUD (in the page's language, via getLocale and onLocaleChange from ./i18n); the camera can follow it without the ground clamp, anchored exactly on it, and a generic HUD adds source rows, a banner, a veil (off under reduced motion) and a bottom progress line. The Rail and Transit layers expose read and hold APIs so a selected train or vehicle can be ridden, and ./layers/rail/paths is exported; that export and the read APIs are experimental. docs/APPLICATION.md shows a minimal provider. GEV itself registers none, and entry to the built-in aircraft, satellite and vessel views is unchanged; a provider's subject takes entry when it was selected after them (Denis Groshev, @ZloyS, #1686).