What If You Could Replay Production Bugs Locally?

Debugging production bugs is still… guesswork. You look at logs. You try to reproduce the issue locally. You add more logs. You redeploy. And hope the bug shows up again. ⸻ The problem We’ve accepted a broken workflow: • Logs don’t show the full picture • Reproducing bugs locally is unreliable • External dependencies behave differently • Fixes often introduce new issues Most of the time, you’re not fixing the bug — you’re guessing your way toward it. ⸻ What if you could replay production failures locally? Instead of guessing, what if you could: • Take the exact production request • Replay it locally • With the same inputs and external IO • Fix the bug • Resume execution safely No mocks. No staging environments. No duplicate side effects. ⸻ Introducing Flux I’ve been working on a tool called Flux to make this possible. It records real API executions and lets you replay failures locally. Here’s how it works: ⸻ Capture the failure flux tail You see the exact request that failed in product