defi-protocols

Q: How do I install defi-protocols?

Run npx skills add https://github.com/pluginagentmarketplace/custom-plugin-blockchain --skill defi-protocols in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/defi-protocols/ (personal) or .claude/skills/defi-protocols/ (project).

by pluginagentmarketplaceBusiness & Finance

Master DeFi protocol development including AMMs, lending, yield, and oracles

Installs: 69
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/pluginagentmarketplace/custom-plugin-blockchain --skill defi-protocols

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads defi-protocols automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

DeFi Protocols Skill

Master DeFi protocol development including AMM mechanics, lending systems, yield optimization, and oracle integration.

Quick Start

# Invoke this skill for DeFi development
Skill("defi-protocols", protocol_type="amm", chain="ethereum")

Topics Covered

1. AMM (Automated Market Makers)

Build decentralized exchanges:

Constant Product: x * y = k (Uniswap V2)
Concentrated Liquidity: Tick-based (Uniswap V3)
Stable Swaps: Curve invariant
TWAP: Time-weighted average price

2. Lending Protocols

Create lending markets:

Overcollateralized: Aave/Compound model
Interest Rates: Utilization-based curves
Liquidation: Health factor, incentives
Isolated Markets: Risk segmentation

3. Yield Optimization

Maximize returns:

Auto-compounding: Vault strategies
Liquidity Mining: Reward distribution
veTokens: Vote-escrowed governance
Bribes: Gauge voting incentives

4. Oracle Integration

Secure price feeds:

Chainlink: Decentralized oracles
TWAP: Manipulation resistant
Staleness Checks: Price freshness
Fallbacks: Multi-oracle setups

Code Examples

AMM Swap Calculation

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

library SwapMath {
    uint256 constant FEE_NUMERATOR = 997;
    uint256 constant FEE_DENOMINATOR = 1000;

    /// @notice Calculate output amount for constant product AMM
    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256) {
        uint256 amountInWithFee = amountIn * FEE_NUMERATOR;
        uint256 numerator = amountInWithFee * reserveOut;
        uint256 denominator = reserveIn * FEE_DENOMINATOR + amountInWithFee;
        return numerator / denominator;
    }

    /// @notice Calculate price impact percentage (basis points)
    function getPriceImpact(
        uint256 amountIn,
        uint256 reserveIn
    ) internal pure returns (uint256) {
        return (amountIn * 10000) / (reserveIn + amountIn);
    }
}

Chainlink Oracle

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

contract PriceOracle {
    AggregatorV3Interface public immutable priceFeed;
    uint256 public constant STALENESS_THRESHOLD = 1 hours;

    error StalePrice();
    error InvalidPrice();

    constructor(address feed) {
        priceFeed = AggregatorV3Interface(feed);
    }

    function getPrice() external view returns (uint256) {
        (, int256 price,, uint256 updatedAt,) = priceFeed.latestRoundData();

        if (block.timestamp - updatedAt > STALENESS_THRESHOLD) {
            revert StalePrice();
        }
        if (price <= 0) revert InvalidPrice();

        return uint256(price);
    }
}

Flash Loan Callback

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@aave/v3-core/contracts/flashloan/base/FlashLoanSimpleReceiverBase.sol";

contract Arbitrage is FlashLoanSimpleReceiverBase {
    function executeOperation(
        address asset,
        uint256 amount,
        uint256 premium,
        address,
        bytes calldata
    ) external override returns (bool) {
        // Execute arbitrage logic here

        // Repay: amount + premium
        IERC20(asset).approve(address(POOL), amount + premium);
        return true;
    }
}

DeFi Math Formulas

Constant Product AMM

Invariant: x * y = k
Output: dy = y - k/(x + dx)
Price: p = y/x
Slippage: dx/(x + dx) * 100%

Interest Rates

Utilization: U = borrows / (deposits + borrows)
Borrow Rate: R = base + slope * U  (when U < optimal)
Supply Rate: R_supply = R_borrow * U * (1 - reserve_factor)

Health Factor

HF = (collateral * liquidation_threshold) / debt
Liquidation when HF < 1

Common Pitfalls

Pitfall	Risk	Prevention
Spot price oracle	Flash loan manipulation	Use TWAP
No slippage check	Sandwich attacks	Enforce min output
Stale prices	Wrong liquidations	Check updatedAt
Reentrancy	Fund drainage	CEI + guards

Security Checklist

Troubleshooting

"Oracle price deviation"

# Compare oracle vs DEX price
cast call $ORACLE "latestRoundData()" --rpc-url $RPC
cast call $POOL "slot0()" --rpc-url $RPC

"Sandwich attack detected"

Add minimum output enforcement:

require(amountOut >= minAmountOut, "Slippage exceeded");

Protocol Addresses (Mainnet)

Protocol	Contract
Uniswap V3 Router	0xE592427A0AEce92De3Edee1F18E0157C05861564
Aave V3 Pool	0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2
Chainlink ETH/USD	0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419

Cross-References

Bonded Agent: 04-defi-specialist
Related Skills: solidity-development, smart-contract-security

Version History

Version	Date	Changes
2.0.0	2025-01	Production-grade with math, security
1.0.0	2024-12	Initial release

FAQ

What does the defi-protocols skill do?

Master DeFi protocol development including AMMs, lending, yield, and oracles

How do I install defi-protocols?

Run npx skills add https://github.com/pluginagentmarketplace/custom-plugin-blockchain --skill defi-protocols in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/defi-protocols/ (personal) or .claude/skills/defi-protocols/ (project).

Which AI agents can use defi-protocols?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is defi-protocols safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains defi-protocols?

It is published by pluginagentmarketplace in pluginagentmarketplace/custom-plugin-blockchain. It has 69 recorded installs.

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defi-protocols

Install

Install

Describe the task

Review the result

SKILL.md

DeFi Protocols Skill

Quick Start

Topics Covered

1. AMM (Automated Market Makers)

2. Lending Protocols

3. Yield Optimization

4. Oracle Integration

Code Examples

AMM Swap Calculation

Chainlink Oracle

Flash Loan Callback

DeFi Math Formulas

Constant Product AMM

Interest Rates

Health Factor

Common Pitfalls

Security Checklist

Troubleshooting

"Oracle price deviation"

"Sandwich attack detected"

Protocol Addresses (Mainnet)

Cross-References

Version History

FAQ

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