[kwhinnery]

I know it's hard to know this since not everyone has access to JSR yet - but it's incorrect to say that adopting JSR (as a module author or consumer) will result in breaking changes. JSR is additive to npm, and can be used alongside npm in existing projects.

Node.js / npm module consumers will be able to use packages published to JSR with minimal differences from packages published to npm. Here's what that will amount to:

- The install command will be different - "npx <jsr command> i @foo/bar" versus "npm i @foo/bar") - some of the configuration will end up looking different when you inspect it. JSR's npm integration makes use of npm aliases and requires a minor configuration change to .npmrc (that will be done for you by the command to install)

But at the end of the day, JSR is integrating with npm using its existing extension points, not replacing or circumventing it. As a practical matter, your Node.js code that imports dependencies from JSR will look the same as code that imports dependencies from npm. It's all coming from the node_modules folder at runtime.

Whether or not module authors choose to use JSR is more about DX than platform support (JSR works well in Deno and any kind of project that uses a node_modules folder). If as a module author, you would find it useful to:

- Publish actual TypeScript source files to the registry rather than build artifacts - Have API docs auto-generated for your package from source code - Use a registry with an explicit goal of being usable across JS runtime environments (rather than being tied to Node specifically)

Then JSR will likely be worth checking out. We'll be opening up JSR to everyone to try soon, so hopefully you can take a look and decide for yourself then :)