id: text('id')
  .primaryKey()
  .$defaultFn(() => idGenerator('agents'))
  .notNull(),

userId: text('user_id')
  .references(() => users.id, { onDelete: 'cascade' })
  .notNull(),

...timestamps,  // Spread from _helpers.ts

// Return array (object style deprecated)
(t) => [uniqueIndex('client_id_user_id_unique').on(t.clientId, t.userId)],

export const insertAgentSchema = createInsertSchema(agents);
export type NewAgent = typeof agents.$inferInsert;
export type AgentItem = typeof agents.$inferSelect;

export const agents = pgTable(
  'agents',
  {
    id: text('id').primaryKey().$defaultFn(() => idGenerator('agents')).notNull(),
    slug: varchar('slug', { length: 100 }).$defaultFn(() => randomSlug(4)).unique(),
    userId: text('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
    clientId: text('client_id'),
    chatConfig: jsonb('chat_config').$type<LobeAgentChatConfig>(),
    ...timestamps,
  },
  (t) => [uniqueIndex('client_id_user_id_unique').on(t.clientId, t.userId)],
);

export const agentsKnowledgeBases = pgTable(
  'agents_knowledge_bases',
  {
    agentId: text('agent_id').references(() => agents.id, { onDelete: 'cascade' }).notNull(),
    knowledgeBaseId: text('knowledge_base_id').references(() => knowledgeBases.id, { onDelete: 'cascade' }).notNull(),
    userId: text('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
    enabled: boolean('enabled').default(true),
    ...timestamps,
  },
  (t) => [primaryKey({ columns: [t.agentId, t.knowledgeBaseId] })],
);

# Generate migrations
bun run db:generate

# After modifying SQL (e.g., adding IF NOT EXISTS)
bun run db:generate:client

-- ✅ Idempotent operations
ALTER TABLE "users" ADD COLUMN IF NOT EXISTS "avatar" text;
DROP TABLE IF EXISTS "old_table";
CREATE INDEX IF NOT EXISTS "users_email_idx" ON "users" ("email");

-- ❌ Non-idempotent
ALTER TABLE "users" ADD COLUMN "avatar" text;