Flux records API executions so you can replay failures locally, fix them, and resume execution safely. Instead of guessing from logs, you get the exact request, inputs, and behavior. Same request. Same IO. Same outcome.
Hey everyone 👋
I built Flux because debugging production bugs always felt like guesswork.
You look at logs, try to reproduce locally, add more logs, redeploy… and repeat.
Flux changes that.
It records every request (including external calls), so you can replay the exact failure locally.
Fix the bug → replay safely → then resume the same execution with real IO.
No mocks. No staging. No duplicate side effects.
I’m especially curious:
Would you trust something like this in your debugging workflow?
Happy to answer anything — especially how replay/resume works under the hood.
replaying the exact request locally instead of guessing from logs is huge. i spend way too much time trying to reproduce stuff from production. and its open source too which is a plus
The resume-after-fix part is the piece I haven't seen before. Most replay tools let you reproduce the bug, but you still have to re-trigger the whole flow manually. How does the resumption work in practice - does Flux hold state between the failure and the fix, or is it more like re-running from a checkpoint?
About Flux on Product Hunt
“Fix production bugs by replaying them locally”
Flux launched on Product Hunt on March 24th, 2026 and earned 109 upvotes and 18 comments, placing #14 on the daily leaderboard. Flux records API executions so you can replay failures locally, fix them, and resume execution safely. Instead of guessing from logs, you get the exact request, inputs, and behavior. Same request. Same IO. Same outcome.
Flux was featured in API (98k followers), Open Source (68.3k followers), Developer Tools (511k followers) and GitHub (41.2k followers) on Product Hunt. Together, these topics include over 105.2k products, making this a competitive space to launch in.
Who hunted Flux?
Flux was hunted by Shashi Sharma. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Flux stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Shashi Sharma