Client UI Best Practices Plugin

This Codex plugin provides client UI threading and state-driven rendering guidance. It defines a platform-independent Host boundary that owns observable UI-ready state and asynchronous business tasks, so feature behavior can be tested without a UI runtime.

Contents

• plugin.json declares the portable plugin and client extensions.
• skills/client-ui-best-practices/SKILL.md defines main-thread boundaries, a hostScope confined to an injected custom serial dispatcher, explicit Default/IO switching, state/effect collection, and UI-free Host tests.
• agents/client-ui-architecture-reviewer.md reviews state ownership, Host boundaries, scheduling, lifecycle, and testability; the parent waits for its final report before editing or responding.

Local Marketplace Entry

The repository marketplace registers this plugin as client-ui-best-practices at ./plugins/client-ui-best-practices.

Plugin packaging

plugin.json is the portable metadata source. Client manifests and complete skill resources are generated into me.claude and me.codex; install from those repositories. Source skills use portable frontmatter. Claude routing is stored in extensions.com.anthropic.claude.skillFrontmatter, keyed by skill directory, and injected only into generated Claude skills. Codex skill files are copied unchanged.