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Project River
See how your codebase evolved, contributor by contributor
Project River turns raw Git commit data into an interactive streamgraph -- a flowing, color-coded visualization where each band represents one contributor and the thickness shows their activity over time. It's built for engineering managers, tech leads, and open-source maintainers who need to answer questions that GitHub Insights can't: Who are the quiet core contributors? When did a project's momentum shift? Is knowledge concentrated in too few people?
Hey Product Hunt -- I'm Lionad, a web engineer building tools at the intersection of data visualization and developer experience.
I built Project River because I kept running into the same problem: GitHub's built-in insights tell you *what* happened (commit counts, PR velocity), but not *who* the project depends on or *when* its community shifted. I wanted to see the full shape of a repository's history in a single glance.
So I turned Git commit data into streamgraphs -- flowing, color-coded charts where every band is a contributor and the width represents their activity. The result is something you can actually *read*: you can spot when a key maintainer stepped back, see how a project's contributor base diversified after a major release, or identify bus-factor risks before they become emergencies.
The demo has pre-loaded data for Vue.js, React, jQuery, and Atom so you can explore right away -- no signup, no install, no backend.
https://lionad-morotar.github.io...
A few things I'd love feedback on:
**What other signals would be useful?** I'm currently surfacing contributor volume, concentration, and activity trends. What's missing -- code ownership heatmaps? PR review latency? Language distribution over time?
Project River is open source. The source is here: https://github.com/Lionad-Morota...
Thanks for checking it out.
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About Project River on Product Hunt
“See how your codebase evolved, contributor by contributor”
Project River was submitted on Product Hunt and earned 1 upvotes and 1 comments, placing #150 on the daily leaderboard. Project River turns raw Git commit data into an interactive streamgraph -- a flowing, color-coded visualization where each band represents one contributor and the thickness shows their activity over time. It's built for engineering managers, tech leads, and open-source maintainers who need to answer questions that GitHub Insights can't: Who are the quiet core contributors? When did a project's momentum shift? Is knowledge concentrated in too few people?
Project River was featured in Developer Tools (511.7k followers) and GitHub (41.2k followers) on Product Hunt. Together, these topics include over 87.1k products, making this a competitive space to launch in.
Who hunted Project River?
Project River was hunted by 仿生狮子. 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 Project River stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
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