Create Spine 2D skeletal animations from pre-existing character assets (separated body-part PNGs, atlas spritesheet, or a full character image). Use this skill whenever the user wants to animate a 2D character, create Spine JSON from existing art assets, rig a character with bones, build walk/idle/run/attack animations, produce an interactive Spine Web Player preview, or generate Spine-compatible export files (.json + .atlas + .png). Also trigger when the user mentions "Spine animation", "2D rigging", "skeletal animation", "bone animation", "cutout animation", "animate this character", "make this walk", "create walk cycle", or uploads separated character body parts and wants them animated. This skill handles the full pipeline: asset analysis, skeleton rigging, animation keyframing, Spine JSON export, and interactive HTML5 preview.
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