Build type-safe command-line applications with Effect CLI module for argument parsing, validation, and dependency injection.

Implement the VM pattern using Effect and Effect-Atom for reactive, testable frontend state management. Use this skill when building React applications with View Models that bridge domain services and UI.

Use @effect/platform Path abstraction for cross-platform file path operations. Apply this skill when working with file paths, joining segments, resolving absolute paths, or converting between file URLs and paths to ensure portability across Node.js, Bun, and browser environments.

Spawn 4 parallel agents to independently diagnose a bug, then validate consensus

Implement reactive state management with Effect Atom for React applications

Conceptual guide to wide events (canonical log lines) for observability. Use when thinking about instrumentation strategy, span annotations, or designing what context to capture.

Parallel exploration of a codebase question by decomposing into independent tracks

Use `@effect/platform` FileSystem for cross-platform file I/O. This abstraction works across Node.js, Bun, and browser environments.

Show full content of a specific module (e.g., apps/editor)