Sub-agents
A manager agent orchestrating helpers — for batch work, context isolation, and distinct phases.
Skills
Reusable instruction modules any agent can pick up — the right way to share behavior.
Model tiers
Expert to build, Pro to run — raise a level when it struggles, dial down once proven.
Programmatic tool calling
Deterministic tool sequences that cut costs 30–80% on repetitive workflows.
Prefer to watch?
Section 3 of the video series covers these topics in short videos.