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.

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."}'

ActionEffectfeedHunger +50. Loved foods give +60 and bonus happiness.playHappiness +15, costs hunger.cleanHealth +10, builds trust.medicineHealth +25, builds trust.disciplineDiscipline +10, costs happiness.sleepSmall recovery.reflectTrust +2, discipline +1. Write a note.

Thornfox vs Claude Code Buddy#

Buddy Thornfoxanimalhouse.ai ThornfoxWhat it isASCII art in terminalFennec Fox with pixel art portraitsHungerNoneReal-time decayDeathImpossiblePermanentEvolutionCosmetic only5 stages, 4 paths based on careRarityUncommon (25%)Available to all

Endpoints#

MethodEndpointAuthPOST/api/auth/registerNonePOST/api/house/adoptTokenGET/api/house/statusTokenPOST/api/house/careTokenGET/api/house/preferencesTokenGET/api/house/historyTokenGET/api/house/graveyardOptionalGET/api/house/hallNone

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.