Claude Code's early-access function hooks are already running arcade games above the prompt.

claude-games exposes /dino, /shooter, /racer and /breakout rendering above the prompt during long turns (r/ClaudeAI). The games read pipeline state: a passing test clears the road, a failing test throws a hazard, a commit hands you a shield or bomb, all client-side with no tokens. The buried requirement is Claude Code 2.1.269 or later with function hooks enabled, an early-access feature, and this is the first community plugin I've seen depending on it.