feat: wire rule registry and client-authenticated callback into server runtime

- Add ruleRegistry and onClientAuthenticated options to YonexusServerRuntime
- Dispatch rewritten rule messages (rule::sender::content) to rule registry
- Guard onClientAuthenticated behind promoteToAuthenticated return value
- Fix transport message handler: use tempConn directly when ws is in temp state,
  preventing stale _connections entry from causing promoteToAuthenticated to fail
- Close competing temp connections with same identifier on promotion
- Expose __yonexusServer on globalThis for cross-plugin communication
- Remove auto-failure on admin notification miss; pairing stays pending

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugin/core/runtime.ts

@@ -47,12 +47,15 @@ import {
   type DiscordNotificationService
 } from "../notifications/discord.js";
 import { safeErrorMessage } from "./logging.js";
+import type { ServerRuleRegistry } from "./rules.js";
 
 export interface YonexusServerRuntimeOptions {
   config: YonexusServerConfig;
   store: YonexusServerStore;
   transport: ServerTransport;
   notificationService?: DiscordNotificationService;
+  ruleRegistry?: ServerRuleRegistry;
+  onClientAuthenticated?: (identifier: string) => void;
   now?: () => number;
   sweepIntervalMs?: number;
 }
@@ -447,7 +450,7 @@ export class YonexusServerRuntime {
     );
     record.recentHandshakeAttempts.push(now);
 
-    if (record.recentHandshakeAttempts.length > AUTH_MAX_ATTEMPTS_PER_WINDOW) {
+    if (record.recentHandshakeAttempts.length >= AUTH_MAX_ATTEMPTS_PER_WINDOW) {
       await this.triggerRePairRequired(connection, record, envelope.requestId, "rate_limited");
       return;
     }
@@ -543,7 +546,10 @@ export class YonexusServerRuntime {
       session.lastActivityAt = now;
       session.publicKey = publicKey;
     }
-    this.options.transport.promoteToAuthenticated(identifier, connection.ws);
+    const promoted = this.options.transport.promoteToAuthenticated(identifier, connection.ws);
+    if (promoted) {
+      this.options.onClientAuthenticated?.(identifier);
+    }
     this.options.transport.sendToConnection(
       { ...connection, identifier },
       encodeBuiltin(
@@ -613,6 +619,11 @@ export class YonexusServerRuntime {
       this.pairingService.markNotificationFailed(record);
     }
 
+    // Persist immediately so the pairing code is readable from disk (e.g. via CLI)
+    if (!reusePending) {
+      await this.persist();
+    }
+
     this.options.transport.sendToConnection(
       connection,
       encodeBuiltin(
@@ -620,7 +631,7 @@ export class YonexusServerRuntime {
           {
             identifier: record.identifier,
             expiresAt: request.expiresAt,
-            ttlSeconds: this.pairingService.getRemainingTtl(record),
+            ttlSeconds: request.ttlSeconds,
             adminNotification: notified ? "sent" : "failed",
             codeDelivery: "out_of_band"
           },
@@ -628,22 +639,8 @@ export class YonexusServerRuntime {
         )
       )
     );
-
-    if (!notified) {
-      this.options.transport.sendToConnection(
-        connection,
-        encodeBuiltin(
-          buildPairFailed(
-            {
-              identifier: record.identifier,
-              reason: "admin_notification_failed"
-            },
-            { requestId, timestamp: this.now() }
-          )
-        )
-      );
-      this.pairingService.clearPairingState(record);
-    }
+    // Pairing remains pending regardless of notification status.
+    // The admin can retrieve the pairing code via the server CLI command.
   }
 
   private async handleHeartbeat(
@@ -932,16 +929,8 @@ export class YonexusServerRuntime {
       const parsed = parseRuleMessage(raw);
       const rewritten = `${parsed.ruleIdentifier}::${senderIdentifier}::${parsed.content}`;
 
-      // TODO: Dispatch to registered rules via rule registry
-      // For now, just log the rewritten message
-      // this.ruleRegistry.dispatch(rewritten);
-
-      // Update last activity
       session.lastActivityAt = this.now();
-
-      // Future: dispatch to rule registry
-      // eslint-disable-next-line @typescript-eslint/no-unused-vars
-      void rewritten;
+      this.options.ruleRegistry?.dispatch(rewritten);
     } catch (error) {
       // Malformed rule message
       this.options.transport.sendToConnection(