Type Augmentation does not work

[akantic]

Describe the Bug

https://payloadcms.com/docs/beta/hooks/context#typescript

This does not seem to work for me in version 3 beta-117. It keeps using the old type, however if I cast the type directly then it works, but the original type is not extended but replaced instead.

import { RequestContext } from 'payload'

...
    read: (args) => {
      let contextFromArgs = args.req.context;
      contextFromArgs.myObject; // does not recognize myObject

      let explicitContext: RequestContext; 
      explicitContext.myObject; // works but the type is completely replaced, not augmented
    },
...

Link to the code that reproduces this issue

https://github.com/payloadcms/payload/tree/beta/examples/multi-tenant

Reproduction Steps

To reproduce, I used multi-tenant example from the beta branch.

Create a file types.d.ts in the root directory with the content described in the official docs, and try to access the context from any hook using args.req.context.myObject.

Which area(s) are affected? (Select all that apply)

area: core

Environment Info

Binaries:
Node: 20.11.0
npm: 10.2.4
Yarn: 1.22.19
pnpm: 9.12.2
Relevant Packages:
payload: 3.0.0-beta.112
next: 15.0.0-canary.173
@payloadcms/db-mongodb: 3.0.0-beta.112
@payloadcms/graphql: 3.0.0-beta.112
@payloadcms/next/utilities: 3.0.0-beta.112
@payloadcms/richtext-lexical: 3.0.0-beta.112
@payloadcms/translations: 3.0.0-beta.112
@payloadcms/ui/shared: 3.0.0-beta.112
react: 19.0.0-rc-3edc000d-20240926