A GitHub app that suggests code fixes for conversion failures
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Hi Hacker News!I’m Rashid, a first-year student at UT Austin and the person leading development of Rejourney, a web/app analytics and session replay tool.Recently, a handful of our users emailed us that they only care about a few user recordings (replays) that show conversion issues, and didn't want to waste time watching all the session replays they got. And no matter how many filters/smart capture rules we put in, the deterministic methods of choosing what to capture always missed important session recordings or overshot and recorded everything. Our users also used other platforms like Clarity or Posthog's AI that summarized all the replay issues, but those also either missed important sessions or focused on a few sessions rather than the overall picture in terms of revenue, growth, and conversion leaks.We started to think about the unit of analysis and segmentation strategies for failure patterns across many sessions. That led us to build Marlin (big fish), a GitHub app that looks for recurring conversion failures, connects them to session, console, network, and repository context, and suggests a code change for a developer to review. The cool thing is that if you setup the analytics properly, it will understand which sessions have the "leaks" that impact business metrics and growth significantly. The link is a public demo using a simulated leak detection over a set of replays.It's still pretty early and what we are trying to understand is how well does this perform. Theoretically, it has all the context and feedback it could possibly get in the best possible translated forms for it to understand from the App/website code to the actual user sequence and recordings.Let us know what y'all think!
HN · launched Jun 21, 2026 · 8 upvotes (top 50%) · 1 view
Niche: automated code review tools · 204 launches, 7 in the last 7 days ▼ -22% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- AI feature
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 204 launches in automated code review tools →
Could you build this?
Yes This is a standard GitHub App integration that consumes webhooks or replays from an existing analytics SDK, prompts an LLM with session traces, and outputs PR code suggestions.
Discussion
2 comments analyzed.
Concerns raised: Server costs scaling with large replay volumes, Processing hundreds of multi-MB session replays efficiently
Competitors
Other products that read as similar to this one : 191 launches clear the similarity bar, closest 8 shown.
Attention rank: #100 of 192 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 234 days after the earliest competitor.
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