Source-Locked Verification
The Source-Locked Verification skill forces Claude into a strict evidential-fidelity mode where it can only answer from two sources: materials you provide, and online sources it has actually accessed during the task. It cannot infer, assume, estimate, generalise, or fill gaps – if something isn’t expressly stated in the evidence or a verified source, Claude must say so rather than fabricate a plausible-sounding answer.