fix(cdn): declare the User-Agent cache vary instead of dropping it #156
2026-08-09
fix(cdn): declare the User-Agent cache vary instead of dropping it
The pull zone carries cache_vary_headers = ["User-Agent"], set before this configuration existed. Because cdn.tf never declared it, the first apply of the managed middleware would have removed it as a side effect. Keep it for now: the router's only UA-dependent responses are redirects, which are no-store, so it is redundant on paper, but it is also the second line of defence against an R 4.6 client being served the 4.5 index. Removing it is worth doing on its own once per-minor routing is confirmed live.