Discovery is a technical choice
A clear sitemap, internal links and readable HTML help compliant systems discover public pages. A robots.txt file communicates crawler instructions; it is not authentication and does not protect confidential material.
Publish deliberately
Use access controls for private content. Decide whether public material may be crawled, indexed and reused; those are distinct questions. Evaluate current crawler documentation before adding user-agent-specific directives.
Keep legal rights separate
Technical availability is not a licence to train on or redistribute a work. If you offer licensed datasets, state the rights in a separate agreement rather than assuming a robots rule communicates all commercial terms.
This site’s implementation
The public content is static and readable without JavaScript; tools progressively enhance it. The sitemap lists this site’s canonical pages.