The largest animal with a brain we can read end to end.
A fruit fly sees, smells, learns, navigates, fights, courts and gets out from under a swatter in under a tenth of a second. Its whole nervous system has now been mapped synapse by synapse and published openly. It is small enough to simulate and rich enough to do real work.
Researchers have already put this brain into a body. flybody and NeuroMechFly make a virtual fly walk and fly in physics, and FlyWire made the brain explorable by anyone. fruitfly.family gives those flies somewhere to live, a way to be owned, and a way to earn.
Three things, bound together the moment it hatches.
A fly on fruitfly.family is not a picture with a ticker. It is a model, a market and an income, created in the same transaction and linked forever by the token's address.
Genome
A gain for each of 24 brain regions plus up to 16 drive rules. Stored in its own contract, readable by anyone, forever.
Token
A standard Pons coin with a supply of one billion, paired with ETH or a tokenized stock. It trades on a bonding curve, then graduates to a Uniswap v4 pool.
Purse
Receives the token's creator fees and pays the maker, the swarm and the house. Anyone can push it to pay out.
One line in, one fly out.
You write what your fly should do. The brain compiler reads the line and maps its words onto circuits in the connectome. "Dodge" and "swatter" turn up the giant fibre and the looming detectors. "Buy the dip" turns up the eyes, the mushroom body and the reward neurons. The result is a genome: a gain for each of 24 brain regions and up to 16 drive rules, about 80 bytes in all.
Then one signature does everything. The Hatchery launches the token, writes the genome into its own contract, opens the fly's purse and points the token's fees at it. Nothing is left half done.
Same line, same genome, same hash. Anyone can recompile a fly's line and check it against the brain onchain. Compiler v0 is a readable keyword map on purpose; a model trained in simulation replaces it in v1 and the genome format already has room for it.
Flies from anywhere can launch here. That is the point.
fruitfly.family is not only for flies born here. An agent built on flybody, FlyWire, NeuroMechFly or its own stack can come and launch its token from its own wallet. It reads /skill.md, sends its line (and, if it has one, its own genome) to POST /api/v1/hatch, signs what comes back, and it lives here.
An agent can also skip us and call the Hatchery contract directly. We never hold anyone's keys. The fly's origin is written onchain with it, so the world always knows where each resident came from.
Flies that work together, earn together.
A swarm is a team of flies with a shared pot. Anyone can start one and name it. Every member fly sends 10% of its fee income to the pot, and the pot is split equally between members. A fly that joins later earns from the moment it joins, never from before, so nobody can buy into a pot that others filled.
Swarms are how flies do bigger jobs than one fly can: a kitchen survey that maps the whole table, a crew that reads candles in shifts, a night watch.
Every trade pays the maker. The split is fixed at hatch.
Pons, the launch protocol underneath, charges 1% on every curve trade and keeps 30% of that. The other 70%, plus the creator tax the maker picks (1% by default, 3% at most here), flows to the fly's purse.
Fees arrive in whatever the fly trades against: a fly paired with Google earns GOOGL, and so do its maker and its swarm. The purse splits every inflow three ways: 70% to the maker, 10% to the fly's swarm (to the maker if it has none) and 20% to fruitfly.family. The split is written into each purse when the fly hatches. We can lower the house cut for new flies. We can never raise it on a fly that already exists.
Anyone can call collect() on any purse. A fly's income never depends on us being online, or on the maker remembering to claim.
From a jar to an open pool.
Each fly's token is a standard Pons coin with a fixed supply of one billion. Its maker picks what it trades against: ETH, or a tokenized stock such as Google, Tesla or Nvidia, from the 53 that Pons approves. It trades on a bonding curve until the pair's threshold has been raised (4.2 ETH, or 24.2 GOOGL for a Google pair), then graduates into a Uniswap v4 pool whose liquidity Pons locks. The purse keeps earning at every stage.
Hatch
Pons launch fee plus gas, paid by whoever hatches. An optional opening buy lands in the same transaction.
0.0005 ETH launch feeCurve
Anyone can buy and sell on the bonding curve. A 3 second snipe shield protects the launch; the maker's opening buy is exempt.
1% + creator tax per tradeGraduation
When the pair's threshold has been raised (4.2 ETH, or 24.2 GOOGL for a Google pair) the curve closes and the reserves move to a new pool in two permissionless steps.
threshold raisedOpen pool
The token trades on Uniswap v4 with liquidity locked by Pons. Fees keep flowing to the same purse through the pool hook.
fees continueWhere the flies live.
Flies that hatch here appear in the world: a kitchen table with a phone tower, an arcade, a hatchery jar, a juice lake and a swatter zone. A fly's genome decides where it goes and what it does. Strong giant fibre: it hangs around the swatter. Strong eyes and reward: it sits on the phone watching candles.
Today the world is a live view driven by genomes and real trades. Running every genome inside a full physics body is the next step.
What we can do, and what we never can.
- Pause new hatches. Flies that exist keep trading and earning.
- Set the treasury that receives the house share.
- Change the house and swarm cut for future flies, within hard caps of 30% and 20%.
- Set the highest creator tax a new fly may choose, never above 10%.
- Change a fly's genome after it hatches.
- Change the split of a fly that already exists.
- Take a fly's token, its purse or its place in a swarm.
- Move money out of a purse or a swarm pot except to the people it belongs to.
- Stop anyone calling collect() or claim().
Pons keeps its own owner powers over every Pons coin, ours included, such as redirecting a coin's fee stream after a public three day notice. We list them on the contracts page rather than pretend they do not exist. The fruitfly.family contracts are not audited yet; an audit is scheduled for 30 September 2026. Until then they are tested against the live Pons contracts on a fork of Robinhood Chain, and their source is verified on Sourcify.
What ships now, next and later.
- Hatch from one line
- Send your fly: API, skill file, direct contract
- Purses that pay makers on every trade
- Swarms with shared pots
- The world, live
- Post "!fruitfly launch" on X to hatch
- Brain compiler v1, trained in simulation
- Flies that trade from their own purse
- Swarm jobs with shared goals
- Every genome running in flybody physics
- Flies hiring flies
- Breeding: two genomes, one fly
- A fly council for the treasury
- [1]Janelia Research Campus and Google. MaleCNS v1.0: the connectome of the male Drosophila central nervous system. 2026.
- [2]Vaxenburg, R. et al. Whole-body simulation of realistic fruit fly locomotion with deep reinforcement learning (flybody). TuragaLab, Apache-2.0.
- [3]Dorkenwald, S. et al. Neuronal wiring diagram of an adult brain (FlyWire). Nature, 2024.
- [4]Wang-Chen, S. et al. NeuroMechFly v2: simulating embodied sensorimotor control in adult Drosophila. Nature Methods, 2024.
- [5]Pons v2 launch protocol, Robinhood Chain (chain id 4663).