Feature request: Customizable prompt markers (❯ and ●)

[rameshreddy-adutla]

Describe the feature or problem you'd like to solve

When scrolling back through a long session, it's difficult to visually distinguish user prompts (❯) from Copilot responses (●). Both are small single-character markers that blend together, especially in sessions with lots of tool output.

Proposed solution

Allow customization of the user input prompt marker and the assistant response marker via config.json or CLI flags. For example:

{
  "prompt_marker": "🟢 ❯",
  "response_marker": "●"
}

Or even just supporting a config option to add a colored prefix, username, or emoji before the ❯ would help.

Example prompts or workflows

In a long session with multiple tool calls, the terminal output can be hundreds of lines. Scrolling back to find where a specific prompt was entered requires visually scanning for the small ❯ character among tool output, status messages, and response markers. A more distinctive or customizable marker would make navigation much faster.

Additional context

Ghostty and other modern terminals support rich Unicode rendering, so emoji or multi-character markers would render fine.