feat(skills): add Ethereum, Arbitrum, and Optimism blockchain skills#2923
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… DEX quotes Extends the blockchain skill family with three new EVM chains, each with 9 commands including a new DEX swap quote feature via Odos aggregator. Chain skills (read-only, stdlib-only, no API key): - Ethereum mainnet (chain ID 1) — 15 tokens, EIP-1559 gas - Arbitrum One (chain ID 42161) — 15 tokens, Nitro gas model - Optimism (chain ID 10) — 15 tokens, OP Stack L2 fees 9 commands per chain: - wallet, tx, token, gas, contract, whales, stats, price - NEW: dex — read-only DEX swap quotes via Odos aggregator (price impact, gas estimate, best route across DEXs) All tested against mainnet with live RPC and API calls.
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Summary
Extends the blockchain skill family (alongside existing Base and Solana) with three new EVM chains. Each follows the same pattern:
SKILL.md+scripts/{chain}_client.py, stdlib-only, CoinGecko pricing, no API key required.Chains added
ethereumarbitrum-oneoptimistic-ethereum8 commands per chain
wallet, tx, token, gas, contract, whales, stats, price
Chain-specific gas handling
Tested against mainnet
15 well-known tokens per chain, 6 files, ~3600 lines.