refactor: strip Phase/Plan/R-number references from source comments

packages/auth/src/index.ts

@@ -10,7 +10,7 @@ export {
 export { InputParseError } from "./entities/errors/common";
 export { SESSION_COOKIE } from "./config";
 
-// Use case schemas + types (Plan 9 R18)
+// Use case schemas + types
 export {
   signInInputSchema,
   signInOutputSchema,
@@ -44,7 +44,6 @@ export {
 } from "./events/user-signed-up.event";
 // <gen:realtime-channels>
 
-// Feature conformance manifest (added in conformance milestone i, exposed
-// here in milestone ii so the boot-time assertion and future tooling can
-// read the contract from the package boundary).
+// Feature conformance manifest — declares this feature's use cases, audits,
+// publishes, and consumes. Read by the boot-time assertion + ESLint rules.
 export { authManifest, type AuthManifest } from "./feature.manifest";