Drop a Sill audit bundle below. Every signature is checked in your browser against Sill's published public key — the file never leaves this page, and nothing is sent to Sill. If a single character were changed after the fact, verification fails.
Prefer to verify independently? The public key is at https://sill.so/.well-known/sill-audit-envelope-v1.pub, and every bundle carries the full step-by-step recipe under "How to verify." This page just runs that recipe for you.