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
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
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
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.
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.