Codex Manual
Advanced Capabilities
Learn these after you can reliably complete small tasks with Codex.
Goals
Goals are useful for longer, multi-step work with clearer objectives and completion conditions.
Read: Codex Goals guide
Skills
Skills package reusable workflows, instructions, references, and scripts.
Read: A quick guide to Codex Skills
Plugins
Plugins can bundle skills, commands, MCP config, hooks, assets, and marketplace metadata.
Read:
Subagents
Subagents help split complex work across specialized agents.
Read: Codex Subagents guide
MCP
MCP connects Codex to external tools, data sources, or internal systems. Most beginners can postpone MCP until they need private tools or structured data.