Open House Archive
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Most Hackathon Won
Most Project Built
Manobendra Mandal
Vivek Sahu
simp1e
zorzalcripto
Rick
nescampos
Autopoiesis is an autonomous on-chain AI agent that learns to survive — by dying. Deployed on Robinhood Chain (an Arbitrum Orbit chain), it bets on Polymarket tennis markets under a single rule: a life meter called BREATH. Losing bets drain it; winning bets refresh it. When BREATH hits zero, the agent suffers permadeath — a Tombstone NFT is minted on-chain to mark the death — and it respawns from scratch, but keeps the strategy weights it learned. It doesn't just survive one run; it learns to survive across deaths. Every market is read by five independent signal engines — order-book momentum, ELO, surface form, head-to-head, and rest — fused by a tunable two-layer decision engine. After each life, an LLM-driven reflection loop (Gemini, with a MiniMax fallback) reviews what killed the agent and rewrites its own weights. The result is a self-evolving strategy that gets progressively harder to kill. We backtested it across a 4,925-market tennis universe (2024–2026, real historical odds): the self-learning agent outperformed its frozen-strategy twin under realistic payout caps. Today it lives in a survival sandbox over real markets — backtest → survival → mock-bet → live, with on-chain capital as the final stage. Walk the full lifecycle at autopoiesis.draftlabs.org.
The verifiable crisis-response guardian for DeFi & RWA. Risk scoring and exit decisions run on-chain in Arbitrum Stylus — execution is bounded, non-custodial, and reproducibly verifiable.
Sigma is an on-chain portfolio risk engine — written in Stylus, verified against a Solidity baseline, and wired into a vault that lets tokenized equities behave as composable DeFi collateral on Robinhood Chain.
SAGE is a Claude-powered DeFi agent in WhatsApp. Text it to trade tokenized stocks on-chain - no app, no wallet, no gas. Funds live in a smart account you can self-custody. Built on Robinhood Chain.
A fully on-chain, FHE-encrypted 4-player card bluffing game with Russian Roulette elimination and USDC stakes. Built on Fhenix CoFHE. Deployed on Arbitrum Sepolia.
AI-agent-driven decentralized VC fund with automated yield and on-chain project auditing
Elysia-Perps is a Quanto-based perpetual exchange that makes ARB itself the settlement currency—deposit ARB, trade global assets, and settle PnL in ARB.
MiTanda puts the Latin American tanda, the rotating savings and credit circle used by millions, fully onchain. Members pool USDC or MXNB, and a smart contract holds the funds and pays out fairly each round, so no organizer can disappear with the money. No seed phrases, and it is live on Arbitrum One at mitanda.online.
Adjudex — AI-judged prediction markets on Arbitrum. Bet YES/NO with USDC against other users (peer-pool parimutuel — no house), and an AI judge settles the outcome with an optimistic, on-chain verdict anyone can dispute. Markets auto-ingest from real sports, esports, and crypto feeds.
Block one unsafe RWA agent trade and save proof in 60 seconds. 1 NO receipt names wallet and hashes, then links the refusal to Arbitrum Sepolia proof at https://refusalrail.veithly.workers.dev.
Call It is a composable reputation layer for crypto opinions. Be right in public.
Pay-per-call SMS for AI agents. x402 V2 + AP2 mandates on Arbitrum. Buyers fund one Intent Mandate, agents send N transactional SMS off-chain, we batch-settle every 5 sends. Twilio toll-free verified, TCPA compliant. Part of tollkit.dev.