Summary

Adds multi-repository support to repository filtering in GitLens views, allowing users to filter views to multiple selected repositories simultaneously rather than only single-repository or all-repositories modes.

Impact

• Enables users to focus on relevant repositories when working across multiple repos
• Improves workflow efficiency in multi-repo/monorepo setups
• Reduces visual clutter in views by hiding irrelevant repositories
• Provides granular control over which repositories appear in views

Validation

1. Open workspace with 5+ repositories
2. Open Commits, Branches, or any GitLens tree view
3. Click repository filter dropdown
4. Verify ability to select multiple repositories (checkboxes or multi-select)
5. Select 3 out of 5 repositories
6. Verify view shows only commits/branches from selected repositories
7. Change selection to different set → verify view updates
8. Verify filter state persists across VS Code restarts
9. Test with very large workspace (20+ repos) → verify performance acceptable

Risk

Low — Additive feature extending existing single-repository filter. Potential concerns:

• Performance with many repositories selected
• UI space for multi-select dropdown
• State persistence complexity

Follow Ups

• Add "Recently used" repository filter presets
• Explore repository groups/tags for quick filtering
• Add filter status indicator in view toolbar