The types.
credentials — exams/badges that attest. What employers scan for.
courses — structured learning. Content may be free even when the credential isn't.
docs — official documentation. Free, no credential — prove it with a project instead.
proof specs — project prescriptions for where no credential exists.
The bands.
HR-recognized recruiters know it on sight.
Respected proves real knowledge to a technical reader.
Signal completion trophy — weak standalone proof.
The honesty.
Every URL is fetched and verified before a row appears. free means the content costs nothing — check whether the credential is free, paid, or nonexistent. Retired credentials are excluded, not sold to you as live. Unknown cost is shown as unknown — never guessed.