windows: one console window flashes per project open in 2.2.0 (core git rev-parse without windowsHide) #59598

Summary

On Windows 11 with Windows Terminal as the default terminal application, opening or creating a project in the OpenCode desktop app (v2.2.0) makes exactly one console window flash. It is caused by the core repository detector spawning git without hiding the console: git rev-parse --git-dir --git-common-dir --show-toplevel.

Environment

• opencode version: 2.2.0 (desktop, bundled CLI 2.2.0-x64) 鈥?opencode v2.2.0
• OS: Windows 11, Microsoft Windows NT 10.0.26300.0 (win32 x64)
• Terminal: Windows Terminal 1.24.12741 as the default terminal application (CASCADIA_HOSTING_WINDOW_CLASS)
• Shell: C:\WINDOWS\system32\cmd.exe
• Install/channel: release desktop app (%LOCALAPPDATA%\Programs\ai.opencode.desktop)
• Active plugins: local context-mode development build + cbm-augment (both already spawn with windowsHide: true; see Additional Context)

Reproduction

1. Use Windows 11 with Windows Terminal set as "Default terminal application".
2. Start the OpenCode desktop app (v2.2.0) and let the server start.
3. Open an existing project or create a new one, or trigger a location reload (POST /api/location/reload).
4. A single console/Windows Terminal window appears and disappears immediately, once per opened location.

Expected Behavior

No visible console window is created for background subprocesses such as the Git repository probe.

Actual Behavior

One visible console window per project open. Window capture (Win32 EnumWindows + IsWindowVisible, sampled every 20 ms) during a location load shows:

19:47:11.350  git   parent=13648 [opencode-cli.exe]  cmd=git -C C:\Users\DELL rev-parse --show-toplevel
19:47:28.994  hwnd=3868748  pid=4528  proc=git  class=ConsoleWindowClass  (visible)

The corresponding server log line for the same flow:

level=INFO message="spawning process" command="C:\Program Files\Git\cmd\git.EXE"
args="[\"rev-parse\",\"--git-dir\",\"--git-common-dir\",\"--show-toplevel\"]"

Root cause is the well-known one: opencode-cli.exe runs without a console, and the child console process is created without CREATE_NO_WINDOW (i.e. without windowsHide: true). Windows then allocates a new console, which the configured default terminal (Windows Terminal) hosts as a visible window for a moment.

Additional Context

• This is the only remaining flash after the user patched every plugin-side spawn. The same setup originally produced ~23 flashes per location load (where python, "python" --version, where sh/pwsh/powershell/ruby/go/rustc/php/perl/Rscript/elixir/bun, ...) from a plugin calling execSync without windowsHide. After adding windowsHide: true to those calls, zero visible windows appear for them 鈥?so windowsHide does work in the Bun node:child_process compatibility layer, and the remaining window is purely the core Git probe.
• Git repositories get an additional probe. A non-repository location still triggers git rev-parse --show-toplevel, so the flash happens for every project, repository or not.
• A plugin cannot work around this: per the plugin docs, "Repository discovery continues to use OpenCode's built-in Git and Mercurial detectors", and a custom ctx.worktree.transform strategy only replaces worktree create/remove/list, not the discovery spawn.
• No configuration option disables repository detection or sets console hiding, so there is no user-side mitigation.
• Related but closed reports: Windows: subprocess spawn (git, codegraph, etc.) flashes console window #31629, Desktop app: Console window flashes repeatedly even while idle (CREATE_NO_WINDOW missing) #22414, Windows: every spawned console process flashes a black window (git.exe ~1/sec on v2.0.20) — re-report of #22414, #31629 #52266, Windows: every child cmd.exe (git probes, MCP spawns) flashes a visible console window and steals focus despite windowsHide being set #52281. This report adds a v2.2.0 (2026-10-27) reproduction with the exact command, parent process, and window handle, plus evidence that the issue is isolated to core rather than plugins.

Suggested fix: pass windowsHide: true (or CREATE_NO_WINDOW) to every Bun.spawn/child_process invocation of git, or attach a hidden console to the server process so inherited console children never create a new window.