CodexSkills

A collection of Codex/agent skills for planning, documentation access, frontend development, and browser automation.

Available skills

Agent Orchestration

• planner: Create comprehensive, phased implementation plans with sprints and atomic tasks. Use for planning implementations, breaking down features, or creating structured roadmaps.
• plan-harder: Enhanced planning variant for more detailed analysis and task breakdown.
• parallel-task: Execute plan files by launching multiple parallel subagents to complete tasks simultaneously. Requires an existing plan file from planner.
• llm-council: Multi-agent orchestration system for planning complex tasks. Spawns multiple AI planners (Claude, Codex, Gemini) to generate independent plans, then uses a judge agent to synthesize the best approach. Includes a real-time web UI for monitoring progress and refining plans interactively.

Documentation Access

• context7: Fetch up-to-date library documentation via Context7 API.
• openai-docs-skill: Query OpenAI developer docs via the OpenAI Docs MCP server using CLI.
• read-github: Read and search GitHub repository documentation via gitmcp.io MCP service. Converts github.com/owner/repo URLs to gitmcp.io/owner/repo for LLM-friendly access to repos.

Frontend & Design

• frontend-design: Distinctive frontend design system guidance (imported from Anthropic).
• frontend-responsive-ui: Responsive UI standards (imported from Anthropic).
• vercel-react-best-practices: React/Next.js performance guidance (imported from Vercel).

Browser Automation

• gemini-computer-use: Gemini 2.5 Computer Use browser-control agent skill (Playwright + safety confirmation loop).
• agent-browser: Fast Rust-based headless browser automation CLI from Vercel Labs with snapshot/act pattern for AI agents.

Installation

Install skills using the skills.sh CLI:

# List available skills before installing
npx skills add am-will/codex-skills --list

# Install specific skills to user scope (global)
npx skills add am-will/codex-skills --skill planner --skill context7 -g

# Install all skills interactively (prompts for selection)
npx skills add am-will/codex-skills -g

# Install to specific agents
npx skills add am-will/codex-skills --skill planner -a claude-code -a codex -g

# Install to current project (instead of global)
npx skills add am-will/codex-skills --skill planner

# Non-interactive install (skip prompts)
npx skills add am-will/codex-skills --skill planner -g -y

CLI Options:

Flag	Purpose
-g, --global	Install to user directory (global for all projects)
-a, --agent <agents...>	Target specific agents (claude-code, codex, etc.)
-s, --skill <skills...>	Install specific skills by name
-l, --list	List available skills without installing
-y, --yes	Skip confirmation prompts

Other commands:

npx skills list          # Show installed skills
npx skills remove <name> # Uninstall a skill
npx skills update        # Update all installed skills

Note on Browser Tools: The repo includes two browser automation tools (gemini-computer-use and agent-browser). You don't need to install both - choose the one that best fits your workflow. I recommend agent-browser for speed and simplicity.

Note on Context7: This skill requires a Context7 API key in CONTEXT7_API_KEY. See skills/context7/.env.example and the Authentication section in skills/context7/SKILL.md.

Note on Gemini Computer Use Skill: This skill requires a GEMINI_API_KEY. Ask Codex to help you set it up.

Note on llm-council: This skill requires API keys or Active Subscriptions for multiple providers (Claude/Anthropic, OpenAI for Codex, Google for Gemini). Run ./setup.sh in the skill directory to configure. Includes a real-time web UI that auto-launches during planning sessions.