fix(prompt-gate): harden internal prompt dispatch

src/shared/index.ts

@@ -73,6 +73,7 @@ export * from "./record-type-guard"
 export * from "./session-directory-resolver"
 export * from "./session-route"
 export * from "./prompt-tools"
+export * from "./prompt-failure-classifier"
 export * from "./compaction-marker"
 export * from "./internal-initiator-marker"
 export * from "./plugin-command-discovery"