New top story on Hacker News: Show HN: I made a heatmap diff viewer for code reviews
Show HN: I made a heatmap diff viewer for code reviews
30 by lawrencechen | 9 comments on Hacker News.
0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). 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://ift.tt/JhplHrj https://ift.tt/kvyoPzL https://ift.tt/kNWYH5G https://ift.tt/jn2hWJ5 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://ift.tt/tDhTFri
October 30, 2025 at 09:21PM lawrencechen 30 https://ift.tt/FhO7xMV Show HN: I made a heatmap diff viewer for code reviews 9 0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). 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://ift.tt/JhplHrj https://ift.tt/kvyoPzL https://ift.tt/kNWYH5G https://ift.tt/jn2hWJ5 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://ift.tt/tDhTFri https://0github.com
30 by lawrencechen | 9 comments on Hacker News.
0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). 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://ift.tt/JhplHrj https://ift.tt/kvyoPzL https://ift.tt/kNWYH5G https://ift.tt/jn2hWJ5 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://ift.tt/tDhTFri
October 30, 2025 at 09:21PM lawrencechen 30 https://ift.tt/FhO7xMV Show HN: I made a heatmap diff viewer for code reviews 9 0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). 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://ift.tt/JhplHrj https://ift.tt/kvyoPzL https://ift.tt/kNWYH5G https://ift.tt/jn2hWJ5 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://ift.tt/tDhTFri https://0github.com
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