[IDE Extension] Add plain-text modes for messages and the composer

What variant of Codex are you using?

IDE Extension

What feature would you like to see?

Feature request

Please add options to:

1. Display assistant messages as raw Markdown source instead of rendered Markdown.
2. Use a plain-text composer that does not apply live Markdown formatting while typing.

Ideally, these behaviors could be configured independently.

Motivation

For programming-heavy workflows, raw Markdown is often easier to read and inspect than rendered output. It preserves the exact structure of lists, indentation, links, and code fences, and makes copying or editing the content more predictable.

Likewise, live Markdown formatting in the composer can be distracting when writing technical prompts. A plain-text input mode would provide a simpler, editor-like experience.

Possible configuration

The exact setting names are only illustrative:

{
  "chatgpt.messageDisplayMode": "markdownSource",
  "chatgpt.composerMode": "plainText"
}

The current rendered Markdown and rich composer behavior could remain the default. This request is only for an opt-in plain-text workflow.

Additional information

No response

Start by locating the IDE Extension settings plus the message-rendering and composer entry points. Define two independently configurable opt-in modes, then verify that raw Markdown messages and plain-text composing work separately while the current rendered and rich behaviors remain the defaults.