What problem does it solve? Verifying every UI change on a single shared LG television serializes the whole dev loop, so this Skill lets you build, boot, drive, and screenshot the PlxNative desktop simulator on macOS or Windows/WSLg to validate UI and Plex-data-layer work without the TV. ## Core Features & Use Cases - Build and boot the simulator: Use make sim-macos targets or tools/sim.ps1 on Windows/WSLg to build the SDL2/OpenGL app, stage a PMS token, and boot headless or interactive sessions. - Drive and screenshot screens: Arm boot triggers in an isolated instance root (SIM_DIR), send key tokens through the remote FIFO, and capture numbered PNG screenshots at authored 1920x1080 resolution. - Parallel-safe verification: Run multiple simulator instances concurrently, each with its own runtime directory, so several agents never collide or queue behind the single television. - Use Case: You changed the library grid spacing and the TV is in use. Run make sim-macos-shot SIM_W=1920 SIM_H=1080, inspect the PNG, iterate, then hand off to the tv-session skill for final on-device verification. ## Quick Start Ask the assistant to build the simulator with make sim-macos, boot it to the home screen, and take a 1920x1080 screenshot so you can review the layout.