Codex

This skill hooks Claude up to the Codex CLI for running GPT-5.2 powered code analysis, refactoring, and automated editing directly in your workspace. It handles the command assembly for you, picking the right sandbox mode (read-only, workspace-write, or full access) and asking which reasoning effort level you need before firing off the command. The workflow is solid: it suppresses thinking tokens by default, lets you resume sessions with a simple prompt, and always confirms next steps. Worth noting that GPT-5.2 hits 76.3% on SWE-bench and runs 30% faster than GPT-5.1 on typical tasks. If you're already using Codex CLI for agentic coding workflows, this skill just makes it less tedious to invoke correctly.