[v2 Windows] v2.0.3 times out waiting for background service after local CLI install

Description

Description

On Windows, opencode2 from @opencode/cli v2.0.3 fails to start the managed background service and exits with:

Starting background server...
[07:36:33.937] ERROR (#1): Error: Timed out waiting for the background service to start
    at <anonymous> (B:/~BUN/root/chunk-4e5snr3z.js:3:5676)
    at service.ensure (B:/~BUN/root/chunk-en214e40.js:3:662)
    at service.ensure (definition) (B:/~BUN/root/chunk-4e5snr3z.js:3:3933)
    at cli.server-connection.resolve (B:/~BUN/root/chunk-115pyc4p.js:2780:6687)
    at cli.server-connection.resolve (definition) (B:/~BUN/root/chunk-en214e40.js:2:399)

The package postinstall completes without an error and opencode2 --version reports opencode v2.0.3, but launching opencode2 itself cannot bring up/connect to the background service.

This may be related to #41746 / #41696, but this reproduces on the stable v2.0.3 release rather than an older next build.

Plugins

None required to reproduce; startup fails before the TUI opens.

OpenCode version

opencode v2.0.3

Steps to reproduce

1. On Windows, install @opencode/cli so it is present under node_modules/@opencode/cli.
2. From node_modules/@opencode/cli, run:

node .\postinstall.mjs

3. Confirm the installed v2 CLI:

opencode2 --version

Output:

opencode v2.0.3

4. Run:

opencode2

5. It prints Starting background server... and then times out waiting for the background service.

Screenshot and/or share link

No response

Operating System

Windows 11 Pro

Terminal

PowerShell 7.6.5