Compare agent skills before installing.

Measures whether a player who was never told the rules can read a game's intent off the screen, by sampling scenes from a recorded run and having an isolated agent that has not seen the design or source name the goal, the options, and the risk. Use when a game runs and its mechanics are verified but it is unknown whether the screen communicates what to aim for without a tutorial or HUD text, or as a cheap early gate that can fail a design for decision collapse before a telemetry sweep. Not for judging fun or difficulty, not for verifying that a mechanic matches its spec, and not for confirming that varied decisions survive continued optimal play.

Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.