Tool.edit should recieve json object

[xihale]

Description

I found LLM is likely to pass json type content to write .json files, thus they directly pass json object to edit tool, however, the tool doesn't parse it well, which waste many tokens to change themselves' ways to stringify it (which is likely to make mistakens) or use cat << EOF fallback.

Plugins

oh my opencode

OpenCode version

1.0.203

Steps to reproduce

1. just let LLM write a json file may reproduce it.

Screenshot and/or share link

Operating System

6.12.63-1-MANJARO

Terminal

Ghostty

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Incomplete JSON when writing out files #5890: Incomplete JSON when writing out files
• Can't use Claude Opus 4.5 on opencode using Github Copilot #6281: Can't use Claude Opus 4.5 on opencode using Github Copilot (same JSON parsing error)
• JSON parsing failed: Text #2188: JSON parsing failed with incomplete JSON
• Write Tool includes metadata in output and created filecontent #5362: Write Tool includes metadata in output and created filecontent
• JSON Parse error: Expected '}' with the write tool after updating to v0.5.5 Description #2002: JSON Parse error: Expected '}' with truncated JSON
• gemini doesn't handle edit tool very well #266: gemini doesn't handle edit tool very well (parameter handling)

All of these issues relate to JSON parsing failures and tool parameter handling when LLMs attempt to pass JSON objects directly to the edit/write tools.

Feel free to ignore if none of these address your specific case.