How to write your own Solidity linter using Slang

This guide shows how to build a simple Solidity linter with Nomic Foundation's Slang, a Rust-based compiler API distributed in multiple languages and currently in alpha. The example reimplements the solhint avoid-tx-origin rule, which warns whenever tx.origin is used, in about 20 lines of code. The approach parses source into a concrete syntax tree with Parser.create("0.8.22") and uses Slang's tree query language to match a MemberAccessExpression with tx and origin, then reports each match's file, line and column, using 1-based indexing for output.