Design, write, review, and test Fold's Effect v4 programs: descriptor-facing public APIs, deep services and layers, schemas, tagged failures, resource ownership, concurrency, and real-seam Effect tests. Use for Fold services, adapters, providers, event logs,…
Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module…
Scan a codebase for deepening opportunities, present them as a visual HTML report, then grill through whichever one you pick.
Control and test terminal applications with the termctrl CLI by reading visible screen state, driving named live sessions, sending typed keyboard input, waiting for text, collecting explicit evidence, recording timelines, marking important moments, and…
Browser automation CLI for AI agents. Use when the user needs to interact with websites, including navigating pages, filling forms, clicking buttons, taking screenshots, extracting data, testing web apps, or automating any browser task. Triggers include…
Enforce the no-useEffect rule when writing or reviewing React code. ACTIVATE when writing React components, refactoring existing useEffect calls, reviewing PRs with useEffect, or when an agent adds useEffect "just in case." Provides the five replacement…