Treeline 0 / 32 Get the packs
The Agent Engineering Skill Tree

Climb the treeline.

Agent engineering as a skill tree. Start at the roots, unlock your way up to the frontier: context, tools, the harness, evals, cost, and the cutting edge that shipped this quarter. Click any node. Each one names the real tool to use and the pack that goes deeper.

FoundationsContext & PromptTools & MCPLoop & MemoryHarness & ProductionFrontier
Frontier
Production
Core
Roots
Agent = Model + Harness
Foundations
The Agent Loop
Foundations
Context Is the Product
Foundations
When NOT to Build an Agent
Foundations
Prompt Engineering
Context & Prompt
Context Engineering
Context & Prompt
Context Budgeting
Context & Prompt
Prompt-Cache Economics
Context & Prompt
Context Packing
Context & Prompt
Tool Design
Tools & MCP
Tool-Description Engineering
Tools & MCP
MCP: the Standard
Tools & MCP
Deterministic Tool Access
Tools & MCP
ReAct & Reflexion
Loop & Memory
Stop Conditions
Loop & Memory
Loop Budgets
Loop & Memory
Memory Systems
Loop & Memory
Harness Engineering
Harness & Production
Guardrails & Governance
Harness & Production
Eval-Driven Development
Harness & Production
LLM-as-a-Judge
Harness & Production
Observability over Testing
Harness & Production
Cost & Model Routing
Harness & Production
Data Architecture (the 80%)
Harness & Production
Multi-Agent (when worth it)
Frontier
Sub-Agent Orchestration
Frontier
Extended-Thinking Patterns
Frontier
Computer Use & Browsing
Frontier
RAG, Done Right
Frontier
Frameworks vs Raw
Frontier
Portable by Design
Frontier
Agentic Commerce
Frontier