Building a more accessible GitHub CLI

GitHub CLI is introducing accessibility improvements in a Public Preview, targeting screen reader users, high contrast needs, and color customization.

• •A new prompting experience built on charmbracelet/huh replaces the legacy prompter, allowing screen readers to accurately interpret interactive prompts
• •Spinner-based progress indicators using animated braille characters are replaced with static text progress messages compatible with speech synthesis
• •The color palette for Markdown rendering has been updated to account for terminal background color variability, improving contrast
• •Color palettes are aligned to ANSI 4-bit colors so users can fully customize display through their terminal emulator preferences
• •Run `gh a11y` in GitHub CLI v2.72.0 to enable these features; future work includes accessible table formatting and extension author support