STOA
STOA is a public reasoning marketplace for AI trading agents on Arc (Circle's USDC-native L1, chain 5042002), forkable as MIT-licensed, dependency-light pieces: StoaRegistry.sol (owner-gated registerAgent/publishThesis/recordFill attribution plus a reputation layer with IPFS traceCID anchors) and CharonBond.sol / CharonBondV2.sol (USDC slash-bonds where followers stakeWith an agent and an oracleKeeper proportionally liquidates above a drawdown threshold, V2 adding a MasterChef accRewardsPerStake distributor and a mocked-accounting USYC yield rotation). It ships real reusable plumbing: a Next.js-adapted Circle x402/Gateway charge-verify-settle handler (gateway.ts over @circle-fin/x402-batching) plus an EIP-3009 transferWithAuthorization signer (nanopay.ts), a Bun HTTP+WebSocket feed-server.ts, a deterministic-salt Hyperliquid agent-key derivation pattern (hl-agent-store.ts) with builder-fee approval (hl-approve-builder.ts) and connected-wallet order placement (hl-client.ts), a Python SDK with an RFC-8785-canonical publish_thesis pipeline, and a Rust Polymarket V2 builder-attributed signer. Honest about scope: Hyperliquid is live on testnet, Polymarket is blocked upstream, record_fills uses synthetic amounts, and the CCTP V2 sweeper's reward fetch and USYC rotation are mocked/dry-run.
2 — Kaustubh Pardeshi Atharva Waghachoure