swift-ast-lint

Create SwiftASTLint lint rules for a user's linter project. Covers Rule (no args) and ParameterizedRule (YAML-configurable args) APIs, RuleSet composition, YAML config for per-rule args/include/exclude/disabled_rules, autofix with SwiftSyntax FixIt, and unit testing with SwiftASTLintTestSupport. Use when: user asks to "add a lint rule", "create a rule", "write a rule", mentions "SwiftASTLint rule", "lint rule", "AST rule", wants to check code patterns via SwiftSyntax, or needs help writing Rule closures. Also trigger when user says "add a check for...", "detect when...", "enforce that...", "ban X in code", or any request about catching code patterns at the AST level — even if they don't mention SwiftASTLint. Also use when user runs /rule-creator.