🐞 Bug Report: Windows references @alias/ file search not working

[hongenge]

Description

On Windows, OpenCode references work partially:

• @alias can correctly attach a configured reference root directory
• but @alias/ file-level search inside the referenced directory does NOT work

This breaks expected behavior described in the documentation.

According to docs, both should work:

• @alias → attach reference root
• @alias/ → browse/search files inside reference

However, on Windows, only the first case works.

Steps to Reproduce

1. Configure a reference in opencode.jsonc:

{
  "references": {
    "docs": {
      "path": "D:/docs"
    }
  }
}

2. Start OpenCode on Windows
3. In TUI input:

@docs

✔ Works: reference is attached

@docs/

❌ Does NOT work: no file autocomplete / no search results / no file expansion

OpenCode version

1.17.9

Operating System

Windows 10

Terminal

WezTerm+pwsh

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• @ file mentions always return "No matching items" even though files are accessible (Windows, v1.16.2) #31075: @ file mentions always return "No matching items" on Windows — same platform, similar symptom of file search/autocomplete not working
• @ symbol completely fails to reference files in any directory on Windows (v1.15.12) #29859: @ symbol completely fails to reference files in any directory on Windows — same platform, @ file reference autocomplete not working

The issues above cover general @ file mention failures on Windows, while this issue is specifically about @alias/ (reference file browsing). They may share the same underlying path-handling root cause.