Euler Finance Agent Skill

Core guide for interacting with Euler Finance V2 protocol. Contains rules across 5 categories covering vault operations, EVC orchestration, risk management, architecture concepts, and security.

Companion Skills

For specialized topics, use these companion skills:

• euler-irm-oracles - Oracle adapters, EulerRouter, price resolution, Interest Rate Models
• euler-earn - EulerEarn yield aggregation, strategies
• euler-advanced - Hooks, flash loans, fee flow, rewards
• euler-data - Lens contracts, subgraphs, contract interfaces, developer tools

When to Apply

Reference these guidelines when:

• Depositing, borrowing, or managing positions on Euler vaults (EVK)
• Batching operations via the Ethereum Vault Connector (EVC)
• Monitoring health factors and liquidation risk
• Understanding Euler architecture (vault types, market design)
• Security practices and audit information

Rule Categories by Priority

| # | Category | Impact | Prefix | Key Questions | |---|----------|--------|--------|---------------| | 1 | Vault Operations | CRITICAL | vault- | Get APY, deposit, borrow, create market | | 2 | EVC Operations | CRITICAL | evc- | Batch calls, sub-accounts, operators | | 3 | Risk Management | HIGH | risk- | Check health, liquidation, risk managers, curators | | 4 | Architecture | HIGH | arch- | Market design, vault types | | 5 | Security | CRITICAL | sec- | Audits, best practices |

Quick Reference

1. Vault Operations (CRITICAL)

• vault-get-apy - How to get vault APY and interest rates
• vault-deposit - How to deposit assets into a vault
• vault-borrow - How to borrow assets from a vault
• vault-repay - How to repay borrowed debt
• vault-create-market - How to create a new vault/market

2. EVC Operations (CRITICAL)

• evc-batch - How to batch multiple operations atomically
• evc-sub-accounts - How to use sub-accounts for isolated positions
• evc-operators - How to delegate control via operators
• evc-enable-collateral - How to enable vault as collateral

3. Risk Management (HIGH)

• risk-check-health - How to check account health factor
• risk-liquidation - How liquidations work on Euler
• risk-managers - Understanding risk manager roles

4. Architecture (HIGH)

• arch-market-design - Understanding Euler market design
• arch-vault-types - Core, Edge, and Escrow vault types

5. Security (CRITICAL)

• sec-audits - Security practices and audit information

Core Protocol Components

Ethereum Vault Connector (EVC)

The EVC is the foundational layer mediating between vaults. It provides:

• Batching: Execute multiple operations atomically
• Sub-accounts: 256 isolated positions per address
• Operators: Delegate control over your accounts to other addresses
• Deferred checks: Temporarily violate constraints within a batch

Euler Vault Kit (EVK)

Credit vaults extending ERC-4626 with borrowing:

• Standard ERC-4626 deposit/withdraw/mint/redeem
• Borrow and repay functionality
• Collateral and controller management
• LTV ratios (borrow LTV vs liquidation LTV)

How to Use

Read individual rule files for detailed explanations and code examples:

rules/vault-get-apy.md
rules/evc-batch.md
rules/risk-check-health.md

Each rule file contains:

• Brief explanation of why it matters
• Incorrect code example with explanation
• Correct code example with explanation
• Additional context and references

Full Compiled Document

For the complete guide with all rules expanded: AGENTS.md