ArulIn plain English
Example
Remember it as
A plain-language field guide
How the pieces fit together.
Agents, skills, tools, hooks, and subagents can sound like a bowl of alphabet soup. This guide turns them into a small system you can see, touch, and remember.
One idea at a time
The role is the “who.” The capability is the “what.” The tool is the “how.”
Watch a request move
Press play to see how a simple request travels through an agent system.
1. Request“Explain this failed build.”
2. AgentChooses the debugging role.
3. SkillApplies diagnosis steps.
4. ToolReads logs and runs checks.
5. ResultReturns evidence and next steps.
Quick memory check
One question is enough to make the distinction stick.
Which piece is an automatic action triggered before or after an event?