Unify agent flavor definitions

hub/src/sync/syncEngine.ts

@@ -7,7 +7,7 @@
  * - No E2E encryption; data is stored as JSON in SQLite
  */
 
-import type { LocalResumeTarget, ResumableSession } from '@hapi/protocol'
+import { isKnownFlavor, type LocalResumeTarget, type ResumableSession } from '@hapi/protocol'
 import type { AgentFlavor, CodexCollaborationMode, DecryptedMessage, PermissionMode, Session, SyncEvent } from '@hapi/protocol/types'
 import { unwrapRoleWrappedRecordEnvelope } from '@hapi/protocol/messages'
 import type { Server } from 'socket.io'
@@ -459,7 +459,7 @@ export class SyncEngine {
     async spawnSession(
         machineId: string,
         directory: string,
-        agent: 'claude' | 'codex' | 'cursor' | 'gemini' | 'opencode' = 'claude',
+        agent: AgentFlavor = 'claude',
         model?: string,
         modelReasoningEffort?: string,
         yolo?: boolean,
@@ -486,9 +486,7 @@ export class SyncEngine {
 
     private resolveFlavor(session: Session): AgentFlavor {
         const flavor = session.metadata?.flavor
-        return flavor === 'codex' || flavor === 'gemini' || flavor === 'opencode' || flavor === 'cursor'
-            ? flavor
-            : 'claude'
+        return isKnownFlavor(flavor) ? flavor : 'claude'
     }
 
     private resolveAgentResumeId(session: Session, namespace: string): string | null {