Claude Code cannot output Apple logo Unicode character (U+F8FF) in responses

[kevinjacobs-delfi]

Bug Description

Claude Code cannot output OR edit files containing the Apple logo character (U+F8FF).

Steps to Reproduce

1. Ask Claude Code to write the Apple logo character (U+F8FF) - it won't appear in output
2. Ask Claude Code to edit a line containing U+F8FF - the edit will fail with "String to replace not found"
3. Claude can READ files containing U+F8FF but cannot write or edit lines containing it

Expected Behavior

Claude Code should be able to:

• Output the U+F8FF character in responses
• Edit lines in files that contain U+F8FF

Actual Behavior

• The Apple logo character is missing from output
• Edit operations fail when the search string contains U+F8FF
• User must manually remove the character before Claude can edit the line

Impact

• Confusing user experience where Claude claims capabilities it doesn't have
• Workarounds needed (users must manually remove/add the character)
• Inconsistency between what can be read vs written/edited

Environment

• macOS (where Apple logo is commonly used)
• Observed in status line customization tasks

Suggested Fix

Investigate why certain Unicode characters (particularly private use area characters like U+F8FF) are filtered or fail in both output and string matching operations.

---

Bug discovered and reported by Claude Code during a status line customization session