Licensing
Three separate questions, answered separately: the licence of rig-c's own code, the Spine terms that come with the way you play the output, and the licence of the sample paintings and layers. This page restates rig-c's notices and Esoteric Software's published terms; it is not legal advice, and the originals linked below are what count.
rig-c's own code: MIT
rig-c (core), @rig-c/parts, @rig-c/pose, @rig-c/review, @rig-c/play, @rig-c/pixi, @rig-c/phaser and @rig-c/three are MIT — each repository's LICENSE. That grant covers rig-c's code. It says nothing about Spine, and it does not cover the sample assets below.
Spine terms: they follow what plays the output
rigc build writes two things side by side: Spine 4.3 skeleton data (skeleton.json + skeleton.atlas) and rig-c's own model (skeleton.model.json). rig-c core's NOTICE puts the rule in one line: what the terms turn on is the integration of a Spine Runtime — and rigc neither adds those terms nor removes them.
| Path | What plays or opens the output | Terms that apply |
|---|---|---|
| rig-c's model in a page or an engine | @rig-c/play, @rig-c/pixi / phaser / three | rig-c's MIT. These packages link nothing from Esoteric Software and pose the rig with rig-c's own core, so no Spine Runtime is integrated. |
| Spine data in a product | an official Spine Runtime, or the Spine Web Player (which rigc preview loads) | The Spine Runtimes License: integration is permitted under Section 2 of the Spine Editor License Agreement, or on the condition that each user of the product obtains their own Spine Editor licence, and redistribution includes that licence and copyright notice. |
| Spine data in the Spine editor | the Spine editor, to refine by hand | The Spine Editor License Agreement. |
rigc with @esotericsoftware/spine-core installed beside it | rigc's round-trip gate, validate, preview, vote, bench, bonedist | That install integrates a Spine Runtime, so the Spine Runtimes License applies there. The published rig-c package does not carry spine-core. |
Esoteric Software's licence pages read Last updated April 5, 2025 when this page was written.
Sample assets carry their own licences
| Assets | Licence | Source |
|---|---|---|
| The painting and layers Getting started downloads | CC BY-NC 4.0 — credit required, no commercial use; what you build from them carries that licence | rig-c/exam LICENSE |
| The paintings, See-through inputs and layers in rig-c/parts-examples | MIT | LICENSE |
| The trailer's painting, layers, sky, palm and rendered trailer | MIT | rig-c/trailer LICENSE |
The image models that generated those paintings, and See-through itself, have their own terms; each repository's NOTICE.md records them, and rig-c/parts NOTICE.md collects See-through's. No rig-c package contains See-through code or weights.