Your coding agent writes the feature and runs the tests
Your coding agent writes the feature — let it test it too. Long Horizon runs real browser tests and produces shareable execution reports with logs, screenshots, and network detail for confident feature delivery.
Now that coding agents are writing most of the code, the bottleneck for fast feature delivery has shifted from coding to testing and review. However, our testing and review processes were designed for a time when building the feature was the most time taking step in the software development lifecycle.
I talked to engineers working in startups, both big and small, and there was a recurring theme to how things have been going lately:
1. Every engineer is supposed to deliver more and faster.
2. Almost all the code is being written using AI. There is company mandate to do this.
3. Engineers are spending most of their time testing the features, or mostly not testing them well enough.
4. Code reviews are not as thorough as before since the volume of PRs has increased a lot.
5. Code reviews are not as effective as before since the code is written by AI and engineers do not understand it well enough themselves.
6. More bugs are getting shipped to production than ever before.
Having faced the same issues myself, I decided to build Long Horizon. A platform built for developers to get their favorite coding agent to plan testing scenarios, write tests, run and debug them, and capture how the feature works as human auditable reports.
This lets developers ensure that all scenarios and corner cases get tested though the agent, and they can share the report in their PR as evidence that the feature actually works as expected. PR reviews also become more effective as reviewers can now see exactly how the feature works in all the different scenarios and point out any missed scenarios or UX level issues.
If you, or your team, uses AI to build features and is seeing some of the same problems as listed above, try out Long Horizon and I would love to hear your feedback.
About Long Horizon on Product Hunt
“Your coding agent writes the feature and runs the tests”
Long Horizon launched on Product Hunt on May 12th, 2026 and earned 70 upvotes and 1 comments, placing #25 on the daily leaderboard. Your coding agent writes the feature — let it test it too. Long Horizon runs real browser tests and produces shareable execution reports with logs, screenshots, and network detail for confident feature delivery.
On the analytics side, Long Horizon competes within Software Engineering, Developer Tools and Artificial Intelligence — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how Long Horizon performed against the three products that launched closest to it on the same day.
Who hunted Long Horizon?
Long Horizon was hunted by Vaibhav Sinha. 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.
For a complete overview of Long Horizon including community comment highlights and product details, visit the product overview.
Vaibhav Sinha