[node] ForkOptions omits windowsHide despite Node core passing it to fork() #75523

child_process.ForkOptions omits windowsHide, so TypeScript rejects a fork option that Node forwards to spawn() and explicitly uses in its own cluster implementation.

Reproduction

Verified with TypeScript 6.0.3 and @types/node 24.12.3. The current types/node/child_process.d.ts on master also omits the property.

import { fork } from 'node:child_process';

fork('./worker.js', [], { windowsHide: true });

Running a strict, no-emit typecheck produces:

TS2353: Object literal may only specify known properties, and 'windowsHide' does not exist in type 'ForkOptions'.

Runtime/API evidence

• Node's fork implementation forwards the options to spawn(options.execPath, args, options). I also inspected this implementation in the local Node v26.5.0 runtime.
• Node's own cluster worker creation explicitly calls fork() with windowsHide: cluster.settings.windowsHide.
• This cluster behavior was deliberately added in nodejs/node#17412, landed in January 2018 as 7914b7524d3679893dae3c03a2e9a3ca5a0c7235.
• The current ForkOptions declaration includes windowsVerbatimArguments but not windowsHide.

Expected declaration

Should ForkOptions include windowsHide?: boolean | undefined, with the same console-window meaning and default of false as SpawnOptions.windowsHide?

This matters for tools that fork Node workers from Windows GUI hosts: callers need to suppress extra console windows, but currently must extend the options type locally, for example ForkOptions & Pick<SpawnOptions, 'windowsHide'>.

Node's fork API documentation also omits the property. I have not found a documented reason for that omission; if a Node documentation fix is required before updating the declaration, please confirm. This report concerns the missing property, not changing its runtime default.

I checked existing issues, PRs, and discussions for windowsHide/ForkOptions and did not find an existing type-definition report. Filed in this category as directed by the repository's issue chooser.

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