FitBody

Guidance for implementing the Coordinator + Router navigation pattern in UIKit iOS projects. Covers Coordinator protocol, Router (wrapping UINavigationController), child coordinator lifecycle, Presentable abstraction, and ModulesFactory patterns.

Perform thorough code reviews for Swift/SwiftUI code, including spec adherence (PR description + linked issues), code quality, architecture, performance, security, Swift 6+ best practices, project standards from .claude/CLAUDE.md, and meta-feedback on recurring patterns that suggest gaps in the agent's instructions. Use when reviewing PRs/MRs (especially AI-generated ones), performing quality audits, validating against original spec, or providing structured feedback with severity levels and improvement suggestions for both the code and the agent loop that produced it.