@ fuzzy finder does not show dotfolder contents (.agents/, .claude/, etc.)

Description

The @ file reference fuzzy finder fails to display contents of directories that start with a dot (e.g., .agents/, .claude/, .github/).

Steps to Reproduce

1. Have a project with a dotfolder structure like .agents/SYSTEM/SUMMARY.md
2. In the Claude Code prompt, type @.agents/
3. Observe that subfolders (e.g., SYSTEM/) do not appear in the autocomplete dropdown
4. Regular (non-dot) folders work fine with the same interaction

Expected Behavior

Typing @.agents/ should show the folder's contents (subfolders and files) in the fuzzy finder, the same way non-dot folders do.

Actual Behavior

Dotfolder contents are missing or not surfaced in the fuzzy finder results. The fuzzy finder appears to skip or deprioritize paths under dotfolders.

Workaround

Typing a filename fragment directly (e.g., @SUMMARY) can find files inside dotfolders, but folder-browsing navigation does not work.

Environment

• Claude Code v2.1.94
• Windows 10 Pro 10.0.19045
• Shell: bash

Notes

Dotfolders are common in Claude Code projects (.claude/commands/, .agents/ framework directories). The /powerup tip for @ references doesn't mention this limitation.