L1
Frameworks and orchestration
How the agent is structured and how state, branching, and multi-agent coordination are managed.
Best Open Source AI Agent FrameworksAI Agent Stack Map in 2026
If you want the short answer: the components of an AI agent system usually fall into six layers โ orchestration, coding help, browser control, RAG/memory, observability, and tool bridges. Most teams do not need the best tool in every category. They need the right weak link fixed first.
Updated: 2026-05-22 ยท Query targets: AI agent stack, agent architecture tools, components of an AI agent system
The six layers
L2
Coding agents and dev assistants
How the agent actually helps developers across files, repos, shells, and PR workflows.
Best Coding Agents and AI Dev AssistantsL3
Browser automation
How the agent inspects real web apps, reproduces UI issues, and runs repeatable browser workflows.
Best Browser Automation Tools for AI AgentsL4
RAG and memory
How the agent retrieves context, remembers users and prior work, and serves the right information at the right time.
Best RAG and Memory Tools for AgentsL5
Observability and evals
How the team debugs the agent, traces failures, measures quality, and closes the feedback loop.
Best AI Agent Observability ToolsL6
MCP and tool bridges
How the agent reaches real tools, docs, browsers, infra, and internal systems through a common interface layer.
Best MCP Servers for Claude Code