Building with Pydantic AI Harness Pydantic AI Harness is the official capability library for Pydantic AI. Capabilities that need model or framework support -- and those fundamental to every agent -- live in core pydantic-ai ; optional, batteries-included capabilities live here. Both are composed onto an agent through the same capabilities=[...] API. This skill covers the capabilities shipped by pydantic-ai-harness . For the core framework -- agents, tools, structured output, hooks, and testing -- use the building-pydantic-ai-agents skill instead. When to Use This Skill Invoke this skill when: The user mentions pydantic-ai-harness , CodeMode , code mode, or the Monty sandbox An agent makes many sequential tool calls that could collapse into one sandboxed Python execution The user wants the model to write Python that loops, branches, aggregates, or parallelizes tool calls with asyncio.gather The user asks to sandbox or constrain the code an agent runs Show more Installs 760 Repository pydantic/skills GitHub Stars 98 First Seen Jun 1, 2026 Security Audits Gen Agent Trust Hub Pass Socket Pass Snyk Pass

安装