Guide for implementing features in ClaudeBar following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns. Use this skill when:(1) Adding new functionality to the app(2) Creating domain models that follow user's mental model(3) Building SwiftUI views that consume domain models directly(4) User asks "how do I implement X" or "add feature Y"(5) Implementing any feature that spans Domain, Infrastructure, and App layers

Create structured implementation plans before coding. Use when breaking down complex features, refactors, or system changes. Validates requirements, analyzes codebase impact, and produces actionable task breakdowns with identified dependencies and risks.