Vercel → Cloudflare Migration Checklist

Migrate with an explicit parity baseline, rehearsed cutover, and recoverable rollback.

What the resource contains

52 checks across 7 phases

Parity inventory

DNS and cache verification

Rollback runbook

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1. Inventory

Record current behavior before translating configuration.

Export routes, redirects, rewrites, headers, and cron schedules

Inventory environment variables by runtime and sensitivity

List ISR/cache assumptions, image behavior, and regional dependencies

Capture production response fixtures for critical URLs

2. Rehearsal

Prove the target under production-like traffic.

Run data migrations from a fresh snapshot

Compare status, headers, body, and canonical metadata

Exercise uploads, auth, scheduled jobs, and webhooks

Time the rollback and record the exact trigger

3. Cutover

Keep the change observable and reversible.

Lower DNS TTL ahead of the window

Freeze incompatible writes or dual-write intentionally

Monitor error rate, origin load, cache hit ratio, and write success

Keep the old platform deployable until the acceptance window closes

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