Add HTTP caching to GET and HEAD endpoints with ETag headers.
npx skills add https://github.com/Lonsdale201/wp-agent-skills --skill br-etag-cache
Please help me install this Agent Skill. Skill: br-etag-cache Source: https://github.com/Lonsdale201/wp-agent-skills/tree/main/better-route/br-etag-cache Command: npx skills add https://github.com/Lonsdale201/wp-agent-skills --skill br-etag-cache
HTTP GET/HEAD endpoints often re-emit identical responses. This Skill provides HTTP-level caching by emitting ETag headers and validating If-None-Match, enabling conditional requests and reducing bandwidth.
Attach the ETag middleware to GET/HEAD routes and optionally provide a cheap etagResolver or Cache-Control headers to enable client/CDN caching.
High-intent search queries and answers about installing and using this skill.
To add HTTP ETag caching to better-route GET endpoints, attach the middleware to your read routes. It automatically emits ETag headers for 2xx responses and returns 304 status codes when If-None-Match validators match, reducing bandwidth.
An If-None-Match conditional request returns a 304 Not Modified response when the client's ETag matches the server's resource validator. This HTTP caching mechanism prevents re-transmitting identical response bodies, saving bandwidth.
Yes, you can use weak validators for semantic equivalence in HTTP caching. The middleware supports weak ETag validators (W/"hash") to permit safe caching with client CDNs, allowing equivalent resources to match without requiring byte-for-byte identity.
No, ETag middleware does not apply to POST or other non-read HTTP methods. It strictly targets GET and HEAD endpoints, only processing 2xx non-204 responses to ensure write operations remain unaltered.
To set Cache-Control headers for CDN caching alongside ETag, pair the middleware with your own Cache-Control directives. This combination enables true client and CDN caching across read endpoints by managing both validation and expiration.
A cheap etagResolver is a customizable function to compute ETags from invariant data like last-modified timestamps or resource IDs. It generates an efficient hash for HTTP caching, avoiding expensive full response body hashing.
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