To try it, replace github.com with 0github.com in any pull-request URL. Under the hood, we split the PR into individual files, and for each file, we ask an LLM to annotate each line with a data structure that we parse into a colored heatmap.
Examples:
https://0github.com/manaflow-ai/cmux/pull/666
https://0github.com/stack-auth/stack-auth/pull/988
https://0github.com/tinygrad/tinygrad/pull/12995
https://0github.com/simonw/datasette/pull/2548
Notice how all the example links have a 0 prepended before github.com. This navigates you to our custom diff viewer where we handle the same URL path parameters as github.com. Darker yellows indicate that an area might require more investigation. Hover on the highlights to see the LLM's explanation. There's also a slider on the top left to adjust the "should review" threshold.
Repo (MIT license): https://github.com/manaflow-ai/cmux
I’m not sure an LLM can really capture project-specific context yet from a single PR diff.
Honestly, a simple data-driven heatmap showing which parts of the code change most often or correlate with past bugs would probably give reviewers more trustworthy signals.