Cloudflare Workflows

Status: Production Ready ✅ (GA since April 2025) Last Updated: 2026-01-09 Dependencies: cloudflare-worker-base (for Worker setup) Latest Versions: wrangler@4.58.0, @cloudflare/workers-types@4.20260109.0

Recent Updates (2025):

• April 2025: Workflows GA release - waitForEvent API, Vitest testing, CPU time metrics, 4,500 concurrent instances
• October 2025: Instance creation rate 10x faster (100/sec), concurrency increased to 10,000
• 2025 Limits: Max steps 1,024, state persistence 1MB/step (100MB-1GB per instance), event payloads 1MB, CPU time 5 min max
• Testing: cloudflare:test module with introspectWorkflowInstance, disableSleeps, mockStepResult, mockEvent modifiers
• Platform: Waiting instances don't count toward concurrency, retention 3-30 days, subrequests 50-1,000

Quick Start (5 Minutes)