Pydantic AI Harness plugin: what it installs and how to add it
Extends Pydantic AI agents with Code Mode, combining many tool calls into one sandboxed Python execution.
From the Marketplace: pydantic-skills marketplace
Install
> /plugin marketplace add pydantic/skills> /plugin install pydantic-ai-harness@pydantic-skillsRun both lines inside Claude Code: the first adds the marketplace, the second installs the plugin.
What is inside
- 1skill
About this plugin
This plugin documents how to add pydantic-ai-harness capabilities to Pydantic AI agents through the capabilities=[...] configuration. Its Code Mode guidance explains how eligible tools can be wrapped into a single sandboxed run_code tool, allowing the model to orchestrate multiple calls in one Python execution.
Reach for it when building Pydantic AI agents that need this harness capability model or Code Mode. Core agent features such as tools, structured output, streaming and testing are covered by a separate plugin.
What's inside
- 1 skill:
pydantic-ai-harness
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Skills, not plugins
Prefer a single skill for development work? 593 skills in the same category, each installed on its own.