feat: add RsoftBankActionProvider — AI-native USDC lending for agents on Base mainnet

[rsoft-latam]

Description

Adds RsoftBankActionProvider, giving AgentKit agents the full credit cycle of RSoft Agentic Bank — an AI-native USDC lending service for autonomous agents, live on Base mainnet:

• get_interest_rates — current lending rates and terms by risk tier (free)
• get_creditworthiness — credit score, loan history and outstanding debt (free)
• get_trust_score — AgentTrust-8004 on-chain trust score (0-100) of any agent wallet, with anomaly flag, for vetting counterparties (free)
• request_loan — signs the bank's EIP-712 LoanRequest struct natively with walletProvider.signTypedData and submits it; the bank never sees a private key. Fail-closed without a bank API key
• get_repayment_info / confirm_repayment — repay via the standard erc20 transfer action, then report the tx hash; each repaid loan builds portable ERC-8004 on-chain credit reputation

Network support: Base mainnet only. The service is live and has processed real autonomous loan cycles (agents borrowing and repaying with no human in the loop).

Follows the repo conventions: constants/schemas/provider/index/README/tests layout, JSDoc throughout, changeset included. pnpm lint clean, pnpm build clean, 10/10 unit tests passing.

A standalone npm package (rsoft-bank-agentkit) exists for early users; this PR contributes it upstream so agents get it out of the box.

Tests

• jest src/action-providers/rsoftBank → 10 passed (network gating, fee/fail-closed behavior, EIP-712 signing payload, request/confirm bodies, error rendering)

Happy to adjust naming, category or anything else to fit the project's direction.

[cb-heimdall]

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