feat(session): persist model tier overrides per session

Store per-session config in SQLite and route /model and /reset through command fast-paths so channel sessions keep independent model selection across reconnects and restarts.

src/gateway/server.ts

@@ -23,6 +23,9 @@ import {
   createAgentHandlers,
   createConfigHandlers,
   createPairingHandlers,
+  createIntentHandlers,
+  createRoutingHandlers,
+  createHistoryHandlers,
 } from './handlers/index.js';
 import type { TokenUsageEntry } from './handlers/system.js';
 import type { SessionManager } from '../session/manager.js';
@@ -33,6 +36,9 @@ import type { WebhookHandler } from '../automation/webhooks.js';
 import type { GmailWatcher } from '../automation/gmail.js';
 import type { PairingManager } from '../channels/pairing.js';
 import type { MemoryStore } from '../memory/store.js';
+import type { CommandRegistry } from '../commands/index.js';
+import type { ComponentRegistry } from '../intents/index.js';
+import type { RoutingPolicy } from '../routing/index.js';
 
 export interface GatewayServerConfig {
   port: number;
@@ -62,6 +68,9 @@ export interface GatewayServerConfig {
   /** Optional pairing manager for DM pairing code management via gateway. */
   pairingManager?: PairingManager;
   memoryStore?: MemoryStore;
+  commandRegistry?: CommandRegistry;
+  intentRegistry?: ComponentRegistry;
+  routingPolicy?: RoutingPolicy;
 }
 
 export class GatewayServer {
@@ -122,6 +131,10 @@ export class GatewayServer {
       sessionBridge: this.sessionBridge,
     });
 
+    const historyHandlers = createHistoryHandlers({
+      sessionManager: this.config.sessionManager,
+    });
+
     const toolHandlers = createToolHandlers({
       toolRegistry: this.config.toolRegistry,
       toolExecutor: this.config.toolExecutor,
@@ -132,6 +145,17 @@ export class GatewayServer {
       laneQueue: this.laneQueue,
       metrics: this.metrics,
       sessionManager: this.config.sessionManager,
+      commandRegistry: this.config.commandRegistry,
+    });
+
+    const intentHandlers = createIntentHandlers({
+      intentRegistry: this.config.intentRegistry,
+      enabled: this.config.config?.intents.enabled ?? false,
+    });
+
+    const routingHandlers = createRoutingHandlers({
+      intentRegistry: this.config.intentRegistry,
+      routingPolicy: this.config.routingPolicy,
     });
 
     // Config handlers (only if config object is provided)
@@ -157,12 +181,21 @@ export class GatewayServer {
     for (const [method, handler] of Object.entries(sessionHandlers)) {
       this.router.register(method, handler);
     }
+    for (const [method, handler] of Object.entries(historyHandlers)) {
+      this.router.register(method, handler);
+    }
     for (const [method, handler] of Object.entries(toolHandlers)) {
       this.router.register(method, handler);
     }
     for (const [method, handler] of Object.entries(agentHandlers)) {
       this.router.register(method, handler);
     }
+    for (const [method, handler] of Object.entries(intentHandlers)) {
+      this.router.register(method, handler);
+    }
+    for (const [method, handler] of Object.entries(routingHandlers)) {
+      this.router.register(method, handler);
+    }
   }
 
   async start(): Promise<void> {