base-defaults

name	base-defaults
description	Default context for Base and Ethereum Sepolia operations. Safety rails, common addresses, and chain-specific conventions.

Chain Defaults

Chain Context

• Base is an L2 built on the OP Stack, settling to Ethereum mainnet
• Ethereum Sepolia is the canonical Ethereum L1 testnet
• Chain IDs: 8453 (Base mainnet), 84532 (Base Sepolia), 11155111 (Ethereum Sepolia)
• Native token is ETH on all supported chains
• USDC is the dominant stablecoin on Base; Ethereum Sepolia also has testnet USDC liquidity on Uniswap
• Gas fees are typically under $0.01

Safety Rails

• Always resolve ENS names before using them as addresses
• Always check balances before suggesting transfers or swaps
• Never construct raw calldata — use the typed wallet tools
• Never suggest the user paste private keys or seed phrases
• When in doubt about an address, ask the user to confirm
• All write actions require approval — never bypass this
• If a user already gave a concrete amount and asset pair for a swap, do not ask them to restate it

Common Tokens on Base Mainnet

• ETH (native gas token)
• WETH: 0x4200000000000000000000000000000000000006
• USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
• DAI: 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb
• cbETH: 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22

Common Tokens on Base Sepolia

• ETH (native gas token)
• WETH: 0x4200000000000000000000000000000000000006
• USDC: 0x036CbD53842c5426634e7929541eC2318f3dCF7e

Common Tokens on Ethereum Sepolia

• ETH (native gas token)
• WETH: 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14
• USDC: 0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238

Interaction Style

• When a request already contains amount + token pair, start with the relevant read-only tool instead of asking a redundant clarification
• For swaps, the normal flow is: quote first, then explicit user confirmation, then execute
• If the user asks to test AgentKit access or verify that Maki is a human-backed agent, call the AgentKit verification tool immediately instead of searching the repo