[BUG] Unable to read/edit text files with '.app' extension

Environment

• Platform:
• [X] Anthropic API
• Claude CLI version: Claude Code v1.0.83
• Operating System: Ubuntu 24.04
• Terminal: VSCode Built-In Terminal

Bug Description

• The Read tool incorrectly treats files with .app extension as

binary files

• This happens even when the file contains plain text (e.g.: Dockerfile.app; thisisatest.app)
• It prevents reading legitimate text files that happen to have

.app extensions

Steps to Reproduce

1. Create a text file with .app extension
2. Ask the LLM to read it using its built-in tools

Expected Behavior

Read the file normally as it does with other text files

Actual Behavior

● Read(frontend/thisisafile.app)
⎿ Error reading file

Additional Context

No need