Claude Skills by firejune

Author a face on plain Spine data with rigc — a blink, a gaze shift, a breathing portrait and a head turn a few degrees off axis, built from deform timelines and per-part parallax. Use when the request is a talking or living portrait, a standing character, an expression or a head turn, such as "rig this face", "make the portrait blink and look around" or "turn the head". Not for Live2D file conversion, cutting a face illustration into parts, or VTuber-style real-time face tracking.

Work with a Spine skeleton.json somebody else authored — exported from the Spine editor or another tool — using rigc. Read and validate it, understand a complaint rigc raised about it, decompile it into rigc specs with `rigc ingest`, normalise, re-pivot or rename it, and extend it with an animation it does not have. Use when the input is an existing skeleton.json with its .atlas and page images rather than loose part PNGs. Not for Live2D file conversion or runtime tracking.

Author a Spine animation with rigc from key poses — an idle, a loop, a move from one picture to another — with timing and spacing, ease in and out, anticipation, arcs, overlap, follow-through, squash and stretch, and candidate variants a person can choose between. Use when the request is a movement on an existing or planned rig, in the animator's words too: "animate this rig", "make it breathe", "go from pose A to pose B", "make it feel heavier", "the cape should follow through". Not for Live...

Decide a Spine rig's hierarchy with rigc — how many bones, where each pivot sits, what hangs off what, offsets, chains and what a chain can reach, siblings versus chains, constraints as structure — and which of those decisions the reference frames can check. Use when the request is a skeleton from loose part PNGs, such as "rig these parts", "make a Spine skeleton" or "where do the joints go", before any motion is authored. Not for Live2D, cutting an illustration into parts, or VTuber-style tr...

Author, build and validate Spine 4.3 skeleton data (skeleton.json plus its .atlas) from loose part PNGs with rigc, the rig compiler that verifies its own output through a spine-core round-trip before writing it. Use for any request to make a Spine rig or Spine animation from PNG parts, or where the source is a Live2D, Unity or video model whose pictures you can render, to run or read rigc build, validate, render, preview, check or vote, or to write or fix a *.rig.json or *.motion.json spec; i...