I want to give you a careful, Jain-dharma–centered answer, but I’m not sure there is a canonical “decoding” of Jain yantras as such in Jain scriptures. In Jainism, most formal doctrinal focus is on the Tirthankaras, cosmology, karmic law, and meditation practices, while geometric diagrams or talismanic figures (yantras) are not a core, universally defined part of the canon. Because of that, interpretations of any Jain yantra’s shapes or symbols can vary by local tradition, temple practice, and whether the tradition is Digambar or Śvetāmbarā.

What is generally true in Jain contexts

• The emphasis is devotional and symbolic, not mystical or magical in the way some other traditions use yantras.
• If a diagram is used, its meaning is often tied to reverence for the Tirthankaras, the Jain cosmology, or protective/auspicious purposes, rather than a standardized “ decoding” scheme.
• Digambar and Śvetāmbarā communities may differ in how they present or interpret certain symbols, colors, or arrangements, and these differences reflect lineage and temple custom more than canonical texts.
• Specific figures, numbers, or geometries, when they appear in Jain settings, are typically explained locally by priests or teachers rather than by a single universal Jain text.

If you have a particular Jain yantra (name of the diagram, or an image/description of the figures and colors), I can help explain its devotional significance in Jain terms and note any traditional Digambar/Śvetāmbarā differences that are commonly taught in Jain communities.