How to fetch source code for npm packages using Vercel's OpenSrc Package
Vercel has recently released opensrc package using which AI agents can get context regarding a particular npm package.
The way it works is basically, it’ll clone the package in the ./opensrc/ repo and add the needed prompt like this:
<!-- opensrc:start -->
## Source Code Reference
Source code for dependencies is available in `opensrc/` for deeper understanding of implementation details.
See `opensrc/sources.json` for the list of available packages and their versions.
Use this source code when you need to understand how a package works internally, not just its types/interface.
### Fetching Additional Source Code
To fetch source code for a package or repository you need to understand, run:
```bash
npx opensrc <package> # npm package (e.g., npx opensrc zod)
npx opensrc pypi:<package> # Python package (e.g., npx opensrc pypi:requests)
npx opensrc crates:<package> # Rust crate (e.g., npx opensrc crates:serde)
npx opensrc <owner>/<repo> # GitHub repo (e.g., npx opensrc vercel/ai)