Pixel-art pack

Default upstream: willibrandon/pixel-mcp. Pixelorama and Tiled are documented non-MCP alternatives and are never auto-installed.

codex plugin add ai-game-studio-pixel@frabcd-ai-game-studio

The setup skill detects compatible editors and project sprite/tile conventions, then plans one adapter with permissions and pins. Validation covers transparent alpha, dimensions, palette/pixel-grid preservation, pivots/baselines, atlas padding, animation loops, import metadata, and rollback.