Global project worktree is transiently overwritten after git init without commits

[sim590]

Describe the bug

When fromDirectory() encounters a directory with git init but no commits, it correctly falls back to ProjectID.global but sets worktree to the current directory instead of "/". The Phase 2 upsert then overwrites the global project's worktree in the database.

The global project should always have worktree="/" by definition.

Steps to reproduce

1. Open opencode in a directory without .git (e.g., ~) — global project created with worktree="/"
2. Run git init (without committing) in a different directory
3. Open opencode in that directory — global project's worktree in the database is overwritten with the directory path

Expected behavior

The global project's worktree should remain "/" regardless of which directory triggers the ProjectID.global fallback.

Actual behavior

The global project's worktree is transiently overwritten with the directory path. It self-corrects the next time fromDirectory() is called from a non-git directory.

Impact

Limited — the corruption is transient and self-correcting. This is primarily a metadata consistency issue.

Environment

• opencode version: v1.4.7+
• OS: Linux

[github-actions]

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

• Project ID changes after git init — sessions disappear from TUI #21230: Also triggered by git init — that issue covers project ID changing and sessions disappearing; the root cause (how fromDirectory() handles a freshly-initialized git repo) overlaps with this report.