agent▌

<essential_principles>

Create, update, delete, inspect, and chat with Agent Builder agents. Create, update, delete, list, and test custom tools (ES|QL, index search, workflow). If the user provided a name, use $ARGUMENTS as the default agent name.

When launching parallel agents for code implementation, prevent type duplication.

validate-agent

Use the steps below to plan or implement a new mode. A mode is a way to manage the context of the agent and inject tools, prompts, and mode-related behavior relevant to a product, use case, JTBD, etc. The agent has the switch_mode tool that allows it to switch itself to another mode, which might change tools, prompt, and executables, preserving the current context. Some previously created tools are contextual, meaning they're injected on particular pages of the frontend. The modes change the app

Use agent-browser as the default CLI for deterministic UI checks.

This skill documents best practices for using agent-browser's built-in Kernel provider (-p kernel) for cloud browser automation.

Batteries-included agent component from ui.inference.sh.

planning-agent

Prevent agent output from polluting the main context window.