Reading binary files causes unexpected behavior

Description

When the opencode agent is instructed to read a binary file, it fails to recognize the file type and attempts to read and output the raw binary data. This results in terminal corruption, unreadable output, and fills the LLM context window with garbage data.

Plugins

None

OpenCode version

1.18.30

Steps to reproduce

1. Start an opencode session in your terminal.
2. Instruct the agent to read a binary file. For example, you can ask it to read its own binary:
   read the file at /home/[user]/.opencode/bin/opencode
3. The agent will execute a command similar to:

   $ cat /home/[user]/.opencode/bin/opencode
   

   (or use its internal file reading tool on the binary path).
4. Observe the terminal output being flooded with binary characters.

Screenshot and/or share link

Operating System

Linux

Terminal

Standard Terminal