settings live in one registry, and the net drain starts to peel

- the CVars are one engine-side table that outlives every interface reload: a change fires its observer, the eight latched rows wait for RestartGx, and /console gains set, cvar_reset, cvar_default, cvarlist and help (2303)
- every push into the interface runs in one feed phase after the net drain and before the tick, held by a structural test on the built schedule (2304)
- subsystems own their packet handlers, dispatched in packet order; the auction house is the first family out of the 273-arm drain (2305)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

crates/benilla-protocol/src/events.rs

@@ -146,7 +146,14 @@ impl LoginRefusal {
 
 /// One decoded event from the world stream. Carries only primitives + the coarse [`EntityKind`]
 /// classification — no wire types leak to the app, and no running state lives here.
-#[derive(Debug, Clone)]
+///
+/// [`SessionEventKind`] is its fieldless twin (one variant per variant, derived): the key the
+/// app's packet-handler table dispatches on, as the reference's table is keyed by opcode.
+#[derive(Debug, Clone, strum::EnumDiscriminants)]
+#[strum_discriminants(
+    name(SessionEventKind),
+    derive(Hash, PartialOrd, Ord, strum::EnumIter, strum::IntoStaticStr)
+)]
 pub enum SessionEvent {
     /// A login attempt progressed to `stage` (decision 0539) — IO-thread-emitted, like
     /// [`Self::CharacterList`], never wire-decoded.
@@ -1609,6 +1616,13 @@ pub enum SessionEvent {
     },
 }
 
+impl SessionEventKind {
+    /// Every kind, in declaration order — for a census that asks "who handles each?".
+    pub fn all() -> impl Iterator<Item = Self> {
+        <Self as strum::IntoEnumIterator>::iter()
+    }
+}
+
 /// The result of polling the reader for the next packet's events.
 pub enum Poll {
     /// A packet decoded into these events. `events` is **empty** for an opcode we parse but do not

crates/benilla-protocol/src/lib.rs

@@ -15,7 +15,7 @@ pub mod world;
 pub use auth::AuthReject;
 pub use events::{
     decode, CharAction, EntityKind, LoginRefusal, LoginStage, MoveSpeeds, Poll, SessionEnd,
-    SessionEvent,
+    SessionEvent, SessionEventKind,
 };
 pub use messages::field;
 pub use messages::{