name: cross-chain-swap description: Execute a cross-chain token swap via Uniswap's bridge infrastructure. Handles quoting, safety validation, bridge monitoring, and destination confirmation. Use when the user wants to swap tokens across different chains. model: opus allowed-tools: [Task(subagent_type:cross-chain-executor), mcp__uniswap__getSupportedChains, mcp__uniswap__getTokenInfo]

Cross-Chain Swap

Overview

Executes a cross-chain token swap — swapping a token on one chain for a different (or same) token on another chain. Delegates the full workflow to the cross-chain-executor agent, which handles quoting, route evaluation, safety checks, bridge monitoring, and destination confirmation.

When to Use

Activate when the user asks:

• "Swap ETH on Arbitrum for USDC on Base"
• "Cross-chain swap"
• "Buy USDC on Optimism using ETH from mainnet"
• "Move my ETH from Ethereum to Arbitrum and convert to USDC"
• "Swap tokens across chains"
• "Exchange X on chain A for Y on chain B"

Parameters

Workflow

1. Extract parameters from the user's request. Identify:

   • Which token they want to send and on which chain.
   • Which token they want to receive and on which chain.
   • The amount to swap.
   • Resolve ambiguous chain references (e.g., "mainnet" = "ethereum").

2. Validate inputs:

   • Verify both chains are supported via mcp__uniswap__getSupportedChains.
   • Verify tokens exist on their respective chains via mcp__uniswap__getTokenInfo.
   • If source and destination chain are the same: redirect to execute-swap skill instead.

3. Delegate to cross-chain-executor: Invoke Task(subagent_type:cross-chain-executor) with:

   • tokenIn, tokenOut, amount, sourceChain, destChain, slippage, recipient.
   • The agent handles the full 7-step workflow: quote, risk assessment, safety check, execution, bridge monitoring, confirmation, and reporting.

4. Present results: Format the execution report for the user, highlighting:

   • Amounts sent and received.
   • Total fees (gas + bridge).
   • Settlement time.
   • Any warnings from safety or risk checks.

Output Format

Cross-Chain Swap Complete

  Source:      1.5 ETH on Ethereum
  Destination: 2,850.25 USDC on Base
  Fees:        $3.50 (gas: $2.50, bridge: $1.00)
  Settlement:  2 min 35 sec

  Source Tx:   0xabc...123
  Bridge ID:   0x789...abc
  Dest Tx:     0xdef...456

  Risk: LOW | Safety: APPROVED

Important Notes

• Cross-chain swaps involve bridge operations that take time to settle (typically 1-10 minutes).
• The skill will monitor the bridge and report status updates during settlement.
• Bridge fees and slippage apply in addition to normal swap fees.
• If the bridge gets stuck, the executor will escalate with recovery instructions.

Error Handling