Interface name should be prefixed with 'I'

Severity: Info ID: interface-naming

Flags interface declarations whose names are not prefixed with I.

What it does

Reports interface Foo where Foo does not start with I (e.g. IFoo).

Why is this bad?

Prefixing interfaces with I is the prevailing convention in Solidity codebases (IERC20, IERC721, IUniswapV2Pair, ...). Following it makes the role of each type unambiguous at use sites and aligns with the matching interface-file-naming lint.

Example

Bad

interface ERC20 { /* ... */ }

Good

interface IERC20 { /* ... */ }