Documented server plugin example fails with relative path

TypeScript Version: 4.0.3 & 4.1.0-dev.20201003

Search Terms: plugin link path

Code

Writing a Language Service Plugin | Putting it all together
_{https://github.com/microsoft/TypeScript/wiki/Writing-a-Language-Service-Plugin#putting-it-all-together}

Summary:

I have recreated the example plugin found in the documentation at Writing a Language Service Plugin.

The example works when using 'npm link', but not with relative paths.

I referred to the plugin in tsconfig like this:

"plugins": [{
	"name": "../plugin"
}]

I have also tried to refer to ../plugin/index and ../plugin/index.js, but neither of them works.

Expected behavior:

Be able to refer to the plugin with a relative path.

Actual behavior:

Silently fails without the plugin being loaded.

Start with the linked Writing a Language Service Plugin example and reproduce its tsconfig plugin configuration using the relative ../plugin path. Trace how that configuration resolves the plugin, then verify that the documented example loads the plugin without npm link and no longer fails silently.