[FEATURE] Allow users to change or customize their companion buddy

Problem Statement

Currently, Claude Code ships with a single built-in companion buddy (Glint, a small goose) that appears beside the input box. There is no way to change, customize, or select a different companion. Users who want a different buddy have no configuration option available — it's not in ~/.claude/settings.json, project settings, or any CLI command.

Proposed Solution

Add a setting or interactive picker that lets users choose their companion buddy. This could work as:

• A companion key in ~/.claude/settings.json (e.g., "companion": "fox")
• A /companion slash command to browse and select from available buddies
• An option in the /config interactive settings menu

Alternative Solutions

• Checked all settings files (~/.claude/settings.json, .claude/settings.json, .claude/settings.local.json) — no companion configuration exists
• No CLI flag or command currently supports this

Priority

Nice to have - would improve my experience

Feature Category

UI/UX, Configuration

Use Case Example

1. User opens Claude Code and sees Glint (the goose) as their companion
2. User wants a different buddy that better fits their personality or preference
3. User runs /config or edits settings.json to pick a new companion
4. The new companion appears in future sessions

Additional Context

The companion feature is a fun touch — letting users personalize it would make the experience feel more their own.