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/cache-coherent

a single, sensible Cache-Control directive

chaos chaos.catastrophic.io

GET /cache-confused

Sends contradictory Cache-Control directives. Default bundles three contradictions in one header (no-store with max-age, no-cache with immutable, private with s-maxage). Use ?mode= to test how a specific RFC 9111 conflict is resolved by your cache or proxy.

modes: all store-vs-age cache-vs-immutable private-vs-shared

full chaos docs →

control not.catastrophic.io

GET /cache-coherent

a single, sensible Cache-Control directive

full control docs →

Build against not.catastrophic.io/cache-coherent, then flip the hostname to chaos.catastrophic.io to exercise the chaos.