📦 NEW: Theme Shades of Purple

[ahmadawais]

TLDR

This PR adds the Shades of Purple theme for syntax highlighting in the Gemini CLI. The theme provides a beautiful dark purple aesthetic with vibrant color accents for enhanced code readability and visual appeal.

Dive Deeper

The Shades of Purple theme is a comprehensive syntax highlighting theme that includes:

• Complete theme implementation: I carefully crafted syntax highlighting rules covering multiple programming languages
• Rich color palette: Purple background with vibrant accents (green for strings, yellow for titles, pink for numbers, orange for keywords, etc.)
• Language support: JavaScript/TypeScript, Python, Ruby, SQL, Markdown, JSON, HTML/XML and more
• Advanced features: Line number styling, selection highlighting, diff support, and special language-specific rules

The theme follows the existing architecture pattern:

• Extends the ColorsTheme interface with required color definitions
• Implements the Theme class with proper TypeScript types
• Integrates seamlessly with the existing theme manager system
• Includes gradient colors for UI elements

Technical Implementation:

• Added shades-of-purple.ts with complete theme definition
• Updated theme-manager.ts to register the new theme
• Fixed license header formatting to match project standards
• All existing functionality remains unchanged

Reviewer Test Plan

To validate this change:

1. Build and run the CLI:

   npm run build
   npm start

2. Test theme switching:

   • Once in the CLI, use /theme command to open theme selector
   • Verify "Shades Of Purple" appears in the available themes list
   • Select the theme and confirm it applies correctly

3. Test syntax highlighting:

   • I used a prompt like what would a diff file demo look like in a form of a patch
   • Verify that syntax highlighting uses the purple color scheme
   • Check that different code elements (strings, keywords, comments) display in appropriate colors

Testing Matrix

	🍏	🪟	🐧
npm run	✅	❓	❓
npx	❓	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	✅	-	-

Testing completed:

• ✅ macOS + npm run: All preflight checks pass, builds successfully, tests pass
• ✅ Unit tests: All 1057+ tests passing across CLI and core packages
• ✅ Linting: ESLint passes with proper license header
• ✅ Build: Compiles successfully without errors
• ✅ Integration: Theme integrates properly with theme manager

Linked issues / bugs

No specific issues linked - this is a new feature addition bringing a popular community theme to the Gemini CLI for enhanced developer experience.

---

Note: I am the creator of the original popular Shades of Purple VS Code theme.

[jacob314]

We have a number of pull requests to add custom themes. Unfortunately we can't accept them all as the theme dialog will get overrun with themes. If anything we should have fewer themes then we have today. This is however a pretty compelling theme so if we can figure out an existing theme to remove, I'm open to adding this. A lot of the existing themes are similar. @miguelsolorio may have ideas about which of the existing themes we should consider removing to add this.,

This issue
#2122
tracks supporting loading custom themes. Please thumbs up if you would like that support.

[jacob314]

I think we actually have room for one more line in the theme dialog before it overflows the vertical height of the default so approving as this theme is more unique than most of the other themes that all look similar. Thank you for the contribution and I'm looking forward to using this theme myself.

[ahmadawais]

Thank you @jacob314. Excited to get this approved. Over five million developers use Shades of Purple theme. One of the top five VS Code themes. With 150 different themes, I care deeply about how code is syntax highlighted.

Let’s get another review to speed things along. Excited to share it with purplers.

[NTaylorMullen]

Love this @ahmadawais !!! Also really makes me think we need to build in theming into our extension system asap 🤔

[jacob314]

100% agree about getting theming into our extension. Great news is that we have someone already trying to do that!
#2533
Tracking issue:
#2122