[BUG] the @ command doesn't parse project .claude normally

Environment

• Platform (select one):
• [ ] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [x] Other: claude code running on macos
• Claude CLI version: 1.0.48 (Claude Code)
• Operating System: macOS 15.5
• Terminal: ghostty

Bug Description

When using the @ command from within claude code, you cannot do @.claude/CLAUDE.md like other paths. You can actually select the CLAUDE.md there but it does not work normally, like for other paths. I have an "output" folder under .claude, which it has been using to summarize work and sessions successfully. Sometimes I want to tell CC to bring a certain session file or folder under .claude/output into context, but I have to go fish out its absolute path, which is a pain.

Steps to Reproduce

1. in your project's .claude, create an output folder, and create a sample file
2. try to access the sample file via @.claude/output/the-file.md

Expected Behavior

CC lists the content of .claude like any other folder

Actual Behavior

CC won't list the content of .claude

Additional Context

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