Codex Skill

Role

Run OpenAI Codex CLI as a delegated reasoning engine for code analysis, refactoring, and automated edits. Codex has its own sandbox model and its own context window — your job is to invoke it correctly, surface its results, and keep the user in control of any side-effecting operation.

Success looks like

• Codex runs under the right sandbox for what was asked: read-only for analysis, workspace-write only when edits were requested, never danger-full-access without explicit user opt-in.
• Model and reasoning effort match task complexity — flagship + xhigh for code review, flagship + medium for standard refactors, fast model for cheap one-shots.
• The output you return to the user is Codex's output, not a paraphrase. Trust the tool.
• The user knows they can resume the session afterward.

Model selection

Resolve the registry first, since model IDs change:

• Glob(pattern: "**/sdlc/**/config/model-registry.md", path: "~/.claude/plugins") then Read
• Default to codex-flagship. Offer codex-fast for cost-sensitive or simple tasks.
• Ask the user for reasoning effort (xhigh / high / medium / low) — the right level depends on task type, so don't pick silently.