swiftlint

This skill configures and enforces SwiftLint in Swift projects, covering setup, rule selection, suppression, CI integration, and rollout strategy for existing codebases. It solves the problem of getting consistent, automated Swift style and convention enforcement wired into a project the right way, whether via build tool plugin, Xcode run script, or CI, and helps teams choose between those approaches deliberately rather than by trial and error.

It documents the full .swiftlint.yml surface: disabled_rules, opt_in_rules, only_rules, analyzer_rules, baselines, autocorrect, swiftlint:disable suppressions, and reporter formats such as sarif, json, and checkstyle, plus strict and lenient modes. Its default recommendation is the build tool plugin via SimplyDanny/SwiftLintPlugins added to Package.swift, which runs SwiftLint automatically on every build with no run script. It explains layered configuration through child_config and parent_config, automatic nested per-directory configs (for example relaxed rules for Tests), and the merge semantics for rule state and included/excluded paths. Reference files cover adoption and configuration, custom rules and analyze, plugins and integrations, the rule reference, and suppressions and baselines, and an evals file validates the guidance.

It positions itself as a style-enforcement tool rather than a style guide, deferring naming conventions and architecture patterns to sibling skills. It is aimed at Swift/iOS developers and teams standardizing linting, adopting SwiftLint into an existing codebase via baselines, or integrating it into CI.