Codebase analysis using Codex CLI with read-only sandbox. Trigger when user needs architecture overview ("analyze this codebase with Codex", "have Codex map dependencies"), onboarding to unfamiliar code, understanding legacy systems, or identifying technical debt.
/plugin marketplace add robbyt/claude-skills/plugin install codex@robbyt-claude-skillsThis skill inherits all available tools. When active, it can use any tool Claude has access to.
Use Codex for codebase analysis with read-only sandbox.
Every prompt sent to Codex MUST include these instructions:
"You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately."
Codex is a consultant. Claude Code handles all file modifications.
If the codex MCP tool is available, use it directly:
mcp__plugin_codex_cli__codex({
"prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately.\n\nAnalyze this project structure and architecture.",
"sandbox": "read-only",
"model": "gpt-5.2"
})
If MCP is unavailable, use shell command:
codex exec "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately.
Analyze this project structure and architecture." --sandbox read-only -m gpt-5.2-codex 2>&1
Full project analysis:
mcp__plugin_codex_cli__codex({
"prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately.\n\nAnalyze this project. Report on:\n- Overall architecture\n- Key dependencies\n- Component relationships\n- Potential issues",
"sandbox": "read-only",
"model": "gpt-5.2"
})
Flow mapping:
mcp__plugin_codex_cli__codex({
"prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately.\n\nMap the authentication flow in this codebase. Identify all components involved.",
"sandbox": "read-only",
"model": "gpt-5.2"
})
Dependency analysis:
mcp__plugin_codex_cli__codex({
"prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete analysis immediately.\n\nAnalyze dependencies in this project:\n- Direct vs transitive\n- Outdated packages\n- Circular dependencies\n- Bundle size impact",
"sandbox": "read-only",
"model": "gpt-5.2"
})
sandbox: "read-only" to prevent file modificationssandbox: "danger-full-access" - this is forbiddendangerouslyDisableSandbox: truereferences/setup.md for troubleshootingCreate distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.