Feature Request: Customizable status line with git branch display (oh-my-zsh style)

Feature Request

Summary

Add a customizable status line in the Claude Code prompt dialog that can display contextual information like the current git branch, similar to oh-my-zsh prompt customization.

Current Behavior

The prompt dialog shows basic information (Claude Code version, model, working directory) but doesn't display the current git branch or other dynamic git/project information that developers commonly reference.

Proposed Behavior

Add a customizable status line that can display:

• Current git branch name
• Git status indicators (dirty/clean, ahead/behind)
• Custom user-defined information
• Similar to oh-my-zsh theming capabilities

Use Case

When working with git repositories, developers frequently need to know which branch they're on. Currently, users must:

1. Ask Claude to check the branch, or
2. Switch to another terminal to run git branch --show-current

Having this information visible in the prompt dialog would:

• Reduce context switching
• Prevent accidental commits to wrong branches
• Improve workflow efficiency
• Match the developer experience from modern terminal prompts

Suggested Implementation

• Allow users to configure a status line template in Claude Code settings
• Support common git variables (branch, status, remote)
• Allow custom shell command output (like oh-my-zsh)
• Provide sensible defaults for common use cases

Example

Claude Code v2.0.73
Sonnet 4.5 • Claude Max
~/Documents/GitHub/ProductConfigurator (develop)

or

Claude Code v2.0.73 | develop ✓ | Sonnet 4.5
~/Documents/GitHub/ProductConfigurator

Additional Context

This would be especially valuable given the git-aware features already built into Claude Code (commit creation, PR management, etc.).