Self-contained Codex skill for ad-hoc development sessions on session branches.
Skill Claude CodeCodex
External black-box security audit of live websites using cmux browser and curl. Covers OWASP Top 10, injection testing (XSS/SQLi/SSTI/LFI/SSRF), HTTP headers, SSL/TLS analysis, DNS/email security (SPF/DKIM/DMARC), admin panel audit, session management, CORS/CSRF/Open Redirect, JS secrets scanning, subdomain…
Skill Claude CodeCodex
Interview techniques, persona creation, journey mapping, and usability testing patterns. Use when planning research, conducting user interviews, creating personas, mapping user journeys, or designing usability tests. Essential for user-research, requirements-analysis, and interaction-architecture agents.
Skill Claude CodeCodex
Toolkit for interacting with and testing web applications using cmux browser. Supports verifying frontend functionality, debugging UI behavior, and inspecting page state.
Skill Codex
Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…
Skill Codex
Migrate supported instruction files, skills, agents, and MCP config into Codex project and global files.
Skill Codex
Use when the user asks how to build with OpenAI products or APIs, asks about Codex itself or choosing Codex surfaces, needs up-to-date official documentation with citations, help choosing the latest model for a use case, or model upgrade and prompt-upgrade guidance; use OpenAI docs MCP tools for non-Codex docs…
Skill Codex
Create and scaffold plugin directories for Codex with a required .codex-plugin/plugin.json, optional plugin folders/files, valid manifest defaults, and personal-marketplace entries by default. Use when Codex needs to create a new personal plugin, add optional plugin structure, generate or update marketplace entries…
Skill Codex
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's capabilities with specialized knowledge, workflows, or tool integrations.
Skill Claude CodeCodex
Skill library router. Searches the skill library by task context and loads matching skills on demand. Always active.
Skill Codex
Install Codex skills into $CODEXHOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos).
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: