Extend Pydantic AI agents with capabilities from pydantic-ai-harness -- the Coder coding agent, file and shell tools in local or sandboxed workspaces (Modal, E2B, Sprites, smolvm), Code Mode, sub-agents and planning, memory and skills, context compaction, guardrails and spend limits, web research and browsers, hosted SaaS integrations, step persistence, and background agents on Render Workflows.
Install
npx skills add pydantic/skills --skill pydantic-ai-harnessnpx skills add pydantic/skills --skill pydantic-ai-harness -a claude-code -gnpx skills add pydantic/skills --skill pydantic-ai-harness -a codex -ggemini skills install https://github.com/pydantic/skills.git --path skills/pydantic-ai-harnessgh skill install pydantic/skills pydantic-ai-harnessgit clone --depth 1 https://github.com/pydantic/skills /tmp/pydantic__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/pydantic__skills/skills/pydantic-ai-harness ~/.claude/skills/pydantic-ai-harness # Claude Code
cp -R /tmp/pydantic__skills/skills/pydantic-ai-harness ~/.agents/skills/pydantic-ai-harness # Codex, Cursor, Gemini CLI, Copilot, OpenCode