Collaborate with Codex (GPT-5.2) via named sessions. Trigger: user asks to work with Codex, use Codex, ask Codex, involve Codex, etc. CRITICAL: Use subcodex CLI via Bash, NOT the Task subagent tool.
/plugin marketplace add zippoxer/claude-skills/plugin install subcodex@zippoxer-skillsThis skill inherits all available tools. When active, it can use any tool Claude has access to.
subcodexNamed Codex sessions that persist across conversation compacts.
ALWAYS run in background — Codex takes 1-30+ minutes. Use run_in_background: true and stop immediately. You'll be notified via <task-notification> when Codex responds.
# Start a session (runs in background)
./skills/subcodex/subcodex new my-task <<'EOF'
Your prompt here.
EOF
# Resume a session
./skills/subcodex/subcodex resume my-task-x7k2 <<'EOF'
Follow-up prompt.
EOF
# List sessions
./skills/subcodex/subcodex list
After starting a background command, stop and tell the user you're waiting for Codex. Don't poll or check — you'll get the response automatically.
By default, Codex can read, write, and execute — just like you. It works in the same directory with full access to edit files and run commands. If you want changes made, tell Codex to make them directly.
| Mode | Read | Write | Execute |
|---|---|---|---|
| Regular (default) | Anywhere | Workspace | Yes |
Review (subcodex review) | Anywhere | No | No |
Dangerous (--dangerous) | Anywhere | Anywhere | Yes |
./skills/subcodex/subcodex new [options] <name> [prompt]
--reasoning — low, medium, high, xhigh--model — gpt-5.2 (default), gpt-5.2-codex, gpt-5.1-codex-max, gpt-5-codex-mini--read-only — Read-only sandbox--dangerous — Full system access./skills/subcodex/subcodex review [options] <name> [prompt]
# Examples
subcodex review --uncommitted my-review
subcodex review --base main my-feature-review
subcodex review --commit HEAD my-commit-review
Reviews default to --reasoning xhigh and read-only mode.
Claude leads, Codex executes. Use Codex to poke holes in your designs and implement hard tasks. Push back on over-engineering.
Push for simple, elegant, maintainable code:
Typical flow:
~/.subcodex/config.json~/.subcodex/conversations/<name>.txtCreating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avoid copyright violations.
Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.
Create beautiful visual art in .png and .pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece. Create original visual designs, never copying existing artists' work to avoid copyright violations.