Edit existing prose or textual files, including prompts, system instructions, AGENTS.md files, Codex skills, documentation, specs, emails, and other writing. Use whenever the user asks to change, update, improve, simplify, rewrite, revise, or make an existing textual file follow new guidance. Requires contradiction removal and in-place editing before adding new text.
Create a locally modified copy of the Codex macOS desktop app. Use when the user wants Codex.app cracked open, renderer/main/resources changed, the app icon replaced with the bundled skill icon, then repacked, ad-hoc signed, placed next to the original as a Codex change-named app bundle, launched, and verified without modifying the original app.
Answer questions about Apple Human Interface Guidelines using the bundled HIG markdown set from sosumi.ai. Use when users ask about Apple design guidance, components, patterns, or platform-specific HIG topics.
Check the current Codex CLI version and fetch/print the matching GitHub Releases changelog from https://github.com/openai/codex/releases when users ask for the Codex version, release notes, or changelog for their installed version.
Capture durable user corrections/avoidances/preferences from the current session and record confirmed learnings in AGENTS.md so Codex follows them. When to use: user says don't do X, avoid Y, from now on do Z, or corrects behavior for future.