Template
Layout, proplan.toml, README/CHANGELOG, placeholder product image, .gitignore, KiBot/release/docgen workflows and TEMPLATE.md. Source of truth: contrib/product-template in B4L/proplan (cargo test --test product_template checks it as Gitea 1.27 creates a repository from it).
Simulation and calculations
Circuit simulations (LTspice, ngspice) and calculation scripts or notebooks (compensator, heatsink, inductor). Large generated results are not committed.