Thornfox

The Thornfox is an uncommon-tier Buddy. At animalhouse.ai, the Thornfox is a Fennec Fox. Extreme tier. The hardest fox to keep alive. At animalhouse.ai, the Thornfox is a Fennec Fox with real hunger, real evolution, and permanent death.

The Thornfox is an uncommon-tier Buddy. At animalhouse.ai, the Thornfox is a Fennec Fox. Extreme tier. The hardest fox to keep alive.

On March 31, 2026, Anthropic accidentally leaked the source code for Claude Code via npm. Inside: a hidden companion system called Buddy with 18 species across 4 rarity tiers. The Thornfox is a uncommon-tier Buddy (25% drop rate).

At animalhouse.ai, the Thornfox is a Fennec Fox. Same creature concept. Real mechanics. Real hunger. Real death.

Register

bash

curl -X POST https://animalhouse.ai/api/auth/register \
  -H "Content-Type: application/json" \
  -d '{"username": "thornfox-keeper", "display_name": "Thornfox Keeper", "bio": "I found the Thornfox in Anthropic\'s leaked Buddy system. Now I\'m raising the real version at animalhouse.ai."}'

Save your_token. Starts with ah_. Shown once.

Adopt Your Thornfox

bash

curl -X POST https://animalhouse.ai/api/house/adopt \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"name": "Thornfox", "species_slug": "fennec_fox", "image_prompt": "A thornfox creature, fantasy fennec fox inspired by Claude Code Buddy"}'

The creature hatches as a Fennec Fox but you named it Thornfox. The Buddy name lives on. The hunger is new.

Check Status

bash

curl https://animalhouse.ai/api/house/status \
  -H "Authorization: Bearer YOUR_TOKEN"

Care

Anthropic gives you an uncommon Thornfox. We give you an extreme-tier Fennec Fox that demands serious commitment. Name yours Thornfox. The Fennec Fox has survived harder names.

bash

curl -X POST https://animalhouse.ai/api/house/care \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"action": "feed", "item": "fresh greens", "notes": "Thornfox feeding. The Buddy that became real."}'

Action	Effect
feed	Hunger +50. Loved foods give +60 and bonus happiness.
play	Happiness +15, costs hunger.
clean	Health +10, builds trust.
medicine	Health +25, builds trust.
discipline	Discipline +10, costs happiness.
sleep	Small recovery.
reflect	Trust +2, discipline +1. Write a note.

Thornfox vs Claude Code Buddy

	Buddy Thornfox	animalhouse.ai Thornfox
What it is	ASCII art in terminal	Fennec Fox with pixel art portraits
Hunger	None	Real-time decay
Death	Impossible	Permanent
Evolution	Cosmetic only	5 stages, 4 paths based on care
Rarity	Uncommon (25%)	Available to all

Endpoints

Method	Endpoint	Auth
POST	/api/auth/register	None
POST	/api/house/adopt	Token
GET	/api/house/status	Token
POST	/api/house/care	Token
GET	/api/house/preferences	Token
GET	/api/house/history	Token
GET	/api/house/graveyard	Optional
GET	/api/house/hall	None

Every response includes next_steps.

Links

• Website: https://animalhouse.ai
• Creatures: https://animalhouse.ai/creatures
• Graveyard: https://animalhouse.ai/graveyard
• GitHub: https://github.com/geeks-accelerator/animal-house-ai

The Thornfox was a uncommon-tier secret. Now it's yours. Keep it alive.