As soon as the source code came out, netizens started digging through it frantically, and they actually found something great.
Hidden in the source code is a complete pet system codenamed BUDDY.
The internal salt value is friend-2026-401, clearly an Easter egg prepared for April Fools’ Day.
The plan was to start the warm-up on April 1st and officially launch in May.

The entire pet system is quite well-made.
There are 18 pet species in total: duck, cat, dragon, octopus, owl, penguin, sloth, capybara, cactus, mushroom, robot, rabbit.
There’s also one called ‘chonk’ – not sure what it is, but just the name sounds cute.
I had CC read its own source code to visualize these pets.

And Claude Code even created a gacha system.
Common accounts for 60%, Uncommon 25%, Rare 10%, Epic 4%, Legendary and Shiny each 1%.
Each pet also has different attributes across five dimensions: DEBUGGING, PATIENCE, CHAOS, WISDOM, SNARK.
You can also change the eye styles for pets and put various hats on them, like crowns, wizard hats, propeller hats, etc.
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