JSON code blocks strip quotation marks in TUI markdown renderer #8222

Environment:

• OpenCode version: 1.1.16
• Terminal: bash with xterm-256color
• OS: WSL2 (Linux 6.6.87.2-microsoft-standard-WSL2)
• Interface: OpenCode TUI

Description:

When the assistant responds with JSON code blocks in the OpenCode TUI, double quotation marks are not rendered/displayed, making the JSON examples appear invalid and confusing for users.

Steps to Reproduce:

1. Launch OpenCode TUI in bash terminal
2. Ask the assistant a question about JSON configuration (e.g., "how do I configure opencode.json?")
3. Observe the JSON code blocks in the response

Expected Behavior:
JSON code blocks should display with proper quotation marks around keys and values:

{
  "key": "value"
}

Actual Behavior:
JSON code blocks display without quotation marks:

{
  key: value
}

Additional Context:

• Quotation marks appear correctly in regular text and bullet lists
• The issue only affects code blocks (specifically JSON, but may affect other languages)
• This makes it impossible to show valid JSON syntax to users
• The assistant's response likely contains the quotes, but the TUI markdown renderer strips them during display

Impact:

• High - Makes it difficult to provide accurate JSON configuration examples
• Users may copy invalid JSON syntax
• Creates confusion about proper JSON formatting