Cross-platform agent skills for Claude Code, Codex CLI, and Gemini CLI. By Posthuman Resources LLC.

Browser automation wrapping Vercel's agent-browser CLI. Navigate pages, fill forms, click buttons, take screenshots, scrape structured data, and automate browser workflows.

Image generation via Nano Banana (Google Gemini image models) and local image processing via Sharp, ImageMagick, and FFmpeg. Generate from prompts, edit existing images, create transparent assets, resize, convert, and batch process.

Opinionated git workflow management. Atomic one-idea-per-commit methodology, worktrees for parallel development, change stacking across dependent branches, GitHub PR workflows, and merge strategies.

/plugin marketplace add arbiterhq/agent-skills

Then install individual plugins:

/plugin install browser-buddy@arbiterhq
/plugin install artistic-vision@arbiterhq
/plugin install git-ideas@arbiterhq

Using the built-in skill installer:

$skill-installer install browser-buddy from arbiterhq/agent-skills

Or manually:

git clone https://github.com/arbiterhq/agent-skills.git
cd agent-skills && bash install.sh

gemini extensions install https://github.com/arbiterhq/agent-skills

Works with Claude Code, Codex, Gemini CLI, Cursor, and 40+ other agents:

npx skills add arbiterhq/agent-skills

This repo is a Bun workspace. To get started:

bun install

Each plugin under plugins/* is a workspace member. The root package is private and not published to npm; distribution happens via the Git repo itself (see Installation above).

agent-skills/
  package.json                      # Bun workspace root (private)
  .claude-plugin/marketplace.json   # Claude Code marketplace manifest
  gemini-extension.json             # Gemini CLI extension manifest
  plugins/                          # Canonical skill sources (Claude Code plugins)
    browser-buddy/
      package.json                  # Workspace member
      .claude-plugin/plugin.json    # Claude Code plugin manifest
      skills/browser-buddy/SKILL.md
    artistic-vision/
    git-ideas/
  skills/                           # Symlinks for Codex and Gemini discovery
  CLAUDE.md                         # Claude Code project context
  AGENTS.md                         # Codex project context
  GEMINI.md                         # Gemini CLI project context

Skills live in plugins/<name>/skills/<name>/SKILL.md with the canonical source of truth. The skills/ directory at the root contains symlinks for cross-tool compatibility.

1. Fork the repo
2. Create a feature branch
3. Follow the conventions in CLAUDE.md (no em dashes, SKILL.md under 500 lines, scripts use set -e)
4. Submit a PR

To add a new skill:

1. Create a new directory under plugins/<skill-name>/
2. Add the .claude-plugin/plugin.json manifest
3. Create skills/<skill-name>/SKILL.md with YAML frontmatter
4. Add a symlink in the root skills/ directory
5. Add an entry to .claude-plugin/marketplace.json

MIT - Posthuman Resources LLC