When I started building spectr-ai, one of the first decisions was which EVM languages to support. Solidity was obvious — it powers over 90% of deployed contracts. But Vyper kept showing up in DeFi protocols I was auditing, and the security differences between the two languages are more significant than most developers realize. This post breaks down where each language helps (and hurts) your contract's security posture, with concrete code examples. Solidity's Footgun Collection Solidity gives you enormous power and enormous rope to hang yourself with. Here are the features that keep auditors employed. delegatecall delegatecall executes another contract's code in the context of the calling contract. This means the called contract can modify the caller's storage. It's the backbone of upgradeable proxies — and the source of hundreds of millions in losses.…