Reference for Codex CLI usage patterns. Consult before calling codex via Bash.
/plugin marketplace add GantisStorm/claude-code-pair-planning-framework/plugin install codex-pair-pipeline@claude-code-repoprompt-codex-pluginsThis skill inherits all available tools. When active, it can use any tool Claude has access to.
Quick reference for Codex CLI commands.
codex exec "[prompt]" -m gpt-5.2 --reasoning-effort high --sandbox read-only --ask-for-approval never 2>&1
| Flag | Purpose |
|---|---|
exec | Non-interactive execution mode |
-m gpt-5.2 | Model selection |
--reasoning-effort high | Reasoning effort (minimal, low, medium, high, xhigh) |
--sandbox read-only | Prevent file modifications |
--sandbox workspace-write | Allow writes within workspace |
--ask-for-approval never | Non-interactive mode |
--search | Enable web search |
-C DIR | Set working directory |
# Resume a previous session
codex resume [session-id] "[prompt]" --sandbox read-only --ask-for-approval never 2>&1
Note: Session IDs are returned in Codex output.
dangerouslyDisableSandbox: true for Bash calls2>&1 to capture all outputNEVER use these flags:
--dangerously-bypass-approvals-and-sandbox - FORBIDDEN--sandbox danger-full-access - FORBIDDENTimeout: Complex analysis may take 5-10 minutes. Use longer timeout values.
Authentication: Codex CLI must be authenticated via codex login.
Flag errors: Run codex --help to verify correct flag usage.
codex --helpThis skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.
This skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash command structure, YAML frontmatter fields, dynamic arguments, bash execution in commands, user interaction patterns, or command development best practices for Claude Code.
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on advanced prompt-based hooks API.