flexport-migration-deep-dive

name	flexport-migration-deep-dive
description	Execute major migration strategies for Flexport including migrating from legacy freight forwarders, ERP system integration, and strangler fig patterns. Trigger: "flexport migration", "migrate to flexport", "flexport ERP integration".
allowed-tools	Read, Write, Edit, Bash(npm:*), Grep
version	1.6.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","logistics","flexport"]
compatibility	Designed for Claude Code

Flexport Migration Deep Dive

Overview

Guide for migrating to Flexport from legacy freight forwarders, manual spreadsheet workflows, or other logistics platforms. Uses a strangler fig pattern to gradually move operations to the Flexport API while maintaining existing systems.

Migration Scenarios

From	To	Complexity	Timeline
Spreadsheet/email	Flexport API	Low	2-4 weeks
Legacy freight forwarder API	Flexport API	Medium	4-8 weeks
ERP (SAP, Oracle)	ERP + Flexport	High	8-16 weeks
Multiple forwarders	Flexport consolidated	High	6-12 weeks

Instructions

Phase 1: Data Migration — Product Catalog

// Migrate product catalog from legacy system to Flexport Product Library
async function migrateProducts(legacyProducts: LegacyProduct[]) {
  const results = { success: 0, failed: 0, errors: [] as string[] };

  for (const legacy of legacyProducts) {
    try {
      await fetch('https://api.flexport.com/products', {
        method: 'POST',
        headers,
        body: JSON.stringify({
          name: legacy.description,
          sku: legacy.partNumber,
          hs_code: legacy.tariffCode,
          country_of_origin: legacy.originCountry,
          unit_cost: { amount: legacy.unitCost, currency: legacy.currency },
          weight: { value: legacy.weightKg, unit: 'kg' },
        }),
      });
      results.success++;
    } catch (err) {
      results.failed++;
      results.errors.push();
    }
  }

  .();
   results;
}

Phase 2: Strangler Fig — Dual-Write

// During migration, write to both systems
class DualWriteShipmentService {
  constructor(
    private legacy: LegacyForwarderClient,
    private flexport: FlexportClient,
    private featureFlags: FeatureFlags,
  ) {}

  async createBooking(params: BookingParams) {
    // Always write to legacy during migration
    const legacyResult = await this.legacy.createBooking(params);

    // Write to Flexport if enabled for this route
    if (this.featureFlags.isEnabled('flexport_booking', { route: params.route })) {
      try {
        const fpResult = await this.flexport.createBooking(params);
        // Compare results for validation
        this.compareResults(legacyResult, fpResult);
      } catch (err) {
        // Log but don't fail — legacy is still primary
        logger.warn({ err, route: params.route }, );
      }
    }

     legacyResult;  
  }
}

Phase 3: Cutover — Route by Route

// Migrate routes one at a time, validate, then cut over
const MIGRATION_PHASES = [
  { routes: ['CNSHA-USLAX'], startDate: '2025-04-01', description: 'Shanghai-LA (highest volume)' },
  { routes: ['CNSHA-DEHAM', 'CNSHA-NLRTM'], startDate: '2025-05-01', description: 'Asia-Europe' },
  { routes: ['*'], startDate: '2025-06-01', description: 'All remaining routes' },
];

// Validate migration readiness per route
async function validateRoute(route: string): Promise<{
  productsCovered: boolean;
  webhooksWorking: boolean;
  dataParity: boolean;
}> {
  // Check all products on this route exist in Flexport
  const products = await db.products.findMany({ where: { routes: { has: route } } });
  const fpProducts = await flexport('/products?per=100');
  const fpSkus = new (fpProducts...( p.));
   productsCovered = products.( fpSkus.(p.));

   { productsCovered, : , :  };
}

Phase 4: Decommission Legacy

// After all routes migrated and validated
async function decommissionLegacy() {
  // Final data sync — export all historical data
  const allShipments = await legacy.exportAllShipments();
  await archiveToS3(allShipments, 'legacy-forwarder-archive');

  // Disable legacy API keys
  // Remove dual-write code paths
  // Update monitoring to Flexport-only alerts
  logger.info('Legacy forwarder decommissioned');
}

Migration Checklist

• Product catalog migrated and validated
• Purchase order history exported
• Webhook endpoints configured and tested
• Dual-write enabled for first route
• Data parity validated between systems
• Stakeholders notified of cutover schedule
• Rollback procedure documented and tested
• Legacy system archived (not deleted)

Resources

• Flexport Developer Portal
• Flexport API Reference
• Products API Tutorial

Next Steps

This completes the Flexport skill pack. Start with flexport-install-auth for new integrations.