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Patch
Open source AI agent that turns API breaks into PRs
Hey Product Hunt 👋
I kept getting bitten by the same thing: an API I depended on would change quietly, no formal spec, no real changelog, and my code would just break in production.
So I built Patch. It's an open source AI agent that watches the APIs and npm dependencies your project depends on. When something changes, instead of just telling you, it scans your codebase for every affected call site, generates a fix, validates it against your own tests, and opens a pull request.
Fix generation is a small agent loop, not a single guess: propose a patch, run it through your type checker and tests, and if it fails, feed the real error back and retry, up to three times, before falling back to an Issue instead of a bad PR. Nothing ever merges automatically.
You bring your own Anthropic or OpenAI key, Patch never sees or stores it.
It's Apache-2.0 licensed and still early. TypeScript/JavaScript today, more languages planned.
github.com/patchhq/patch
What's the worst API breaking change that's ever bitten you in production? Genuinely curious what edge cases I should be building for next. 🙏
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About Patch on Product Hunt
“Open source AI agent that turns API breaks into PRs”
Patch was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #140 on the daily leaderboard. Patch is an open source AI agent that detects breaking API changes and dependency updates, then opens a pull request with the fix, automatically.
Patch was featured in API (98.5k followers), Open Source (68.7k followers), Developer Tools (517.5k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 131.9k products, making this a competitive space to launch in.
Who hunted Patch?
Patch was hunted by Kingsley Odim . 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.
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Kingsley Odim