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Plan lifecycle management for Codex plans stored in $CODEX_HOME/plans (default ~/.codex/plans). Use when a user asks to create, find, read, update, delete, or manage plan documents for implementation work or overview/reference documentation.

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's capabilities with specialized knowledge, workflows, or tool integrations.

Add Agentation visual feedback toolbar to a Next.js project

Clean code principles for readable, maintainable software

Common code patterns and best practices reference for quick lookup

SOLID object-oriented design principles for maintainable code

Test-Driven Development workflow - write tests first, then implementation

Commit and push repository changes while also exporting and committing the Codex chat/session transcript that produced the feature. Use when the user asks Codex to commit, push, save provenance, include the chat, commit the session, attach the Codex conversation, or preserve the implementation chat from ~/.codex/sessions alongside code changes.

Configure Better Auth server and client, set up database adapters, manage sessions, add plugins, and handle environment variables. Use when users mention Better Auth, betterauth, auth.ts, or need to set up TypeScript authentication with email/password, OAuth, or plugin configuration.

Skill for creating auth layers in TypeScript/JavaScript apps using Better Auth.

Configure email verification, implement password reset flows, set password policies, and customise hashing algorithms for Better Auth email/password authentication. Use when users need to set up login, sign-in, sign-up, credential authentication, or password security with Better Auth.

Comprehensive guide for accessing and automating Apple Mail using AppleScript, including reading emails, sending messages, and managing mailboxes.