customerio-upgrade-migration

name	customerio-upgrade-migration
description	Plan and execute Customer.io SDK upgrades and migrations. Use when upgrading customerio-node versions, migrating from legacy APIs, or updating to new SDK patterns. Trigger: "upgrade customer.io", "customer.io migration", "update customer.io sdk", "customer.io breaking changes".
allowed-tools	Read, Write, Edit, Bash(npm:*), Bash(npx:*), Glob, Grep
version	1.0.0
license	MIT
author	Jeremy Longshore <[e-mail]>
compatible-with	claude-code, codex, openclaw
tags	["saas","customer-io","migration","upgrade"]

Customer.io Upgrade & Migration

Current State

!npm list customerio-node 2>/dev/null | grep customerio || echo 'customerio-node: not installed' !npm view customerio-node version 2>/dev/null || echo 'Cannot check latest version'

Overview

Plan and execute customerio-node SDK upgrades safely: assess current version, review breaking changes, apply code migrations, and validate with staged rollout.

Prerequisites

• Current SDK version identified (npm list customerio-node)
• Test environment available
• Version control for rollback

Major Version Migration Reference

Legacy CustomerIO to Modern TrackClient + APIClient

Older versions of customerio-node used a single CustomerIO class. Modern versions split into TrackClient (tracking) and APIClient (transactional/broadcasts).

// BEFORE — Legacy pattern (customerio-node < 2.x)
const CustomerIO = require("customerio-node");
const cio = new CustomerIO(siteId, apiKey);
cio.identify("user-1", { email: "[e-mail]" });
cio.track("user-1", { name: "event_name" });

// AFTER — Modern pattern (customerio-node >= 2.x)
import { TrackClient, APIClient, RegionUS } from "customerio-node";

const cio = new TrackClient(siteId, apiKey, { region:  });
 cio.(, { :  });
 cio.(, { : , : {} });

 api =  (appApiKey, { :  });
 api.(request);