The most common mistake in complex tasks isn’t not knowing how to do them, but taking the wrong first step: unclear file scope, undefined acceptance criteria, and unsorted dependencies. The value of /plan is to have Codex first state what it will do, what it will modify, and how it will verify before entering execution.
Capability and Source Attributes
This is the planning mode in Codex’s official development commands, used to switch to the planning phase of multi-step tasks; it is not a third-party plugin, nor an automatic switch that approves changes for you [1]. Its availability, interface presentation, and specific permissions may still vary with version, platform, and workspace policies.
Three Practical Scenarios
Cross-file refactoring: First list the scope of impact and verification sequence.
