Release v0.4.8 - RequestContext::__isset()/__unset() — truthful isset() on unset-and-proxied superglobal slots (coroutine-legacy populate, #346 Apache bridge). Closes the ext-zealphp#42 residual: $g->server['X'] ?? fallback no longer silently takes the fallback, and app-side defensive guards (if (!isset($g->server)) $g->server = [];) can no longer wipe the live $_SERVER through __set. Root-caused + verified live on the labs parity rig — full original #42 route table green, LEGACY byte-equivalent to COROUTINE mode. - __unset stays a no-op for proxied names so framework slot-detach can never escalate into superglobal deletion (a re-bridge nuked $_ENV pre-guard). - CHANGELOG hygiene: stray [Unreleased] entries re-homed (locale/umask -> 0.4.6, TableSessionHandler -> 0.4.5), preamble deduped.