This repository is a comprehensive tutorial on building AI agent harnesses, structured as 17 progressive lessons. Each lesson introduces a single mechanism (tool use, permissions, hooks, planning, subagents, skill loading, context compaction, memory, task system, background tasks, cron scheduler, agent teams, MCP integration, workflow runtime, and goal loop) that extends a core agent loop without modifying it. The harness enables a language model (Claude) to perceive, reason, and act through tool interactions while managing context, permissions, and collaboration. The repository includes runnable Python implementations for each lesson and an interactive Next.js web application with visualizations for learning and experimentation.
CCteam-creator is a Claude Code skill that enables multi-agent team orchestration through file-based planning and role-based collaboration. It sets up persistent agent teams with specialized roles (backend-dev, frontend-dev, researcher, e2e-tester, reviewer, custodian) that communicate via SendMessage while maintaining state in .plans/ directories. The system includes mechanisms for context recovery, team snapshots, doc-code synchronization, invariant-driven review, and automated code quality checks via golden_rules.py. Team-lead (the main conversation) acts as the control plane managing task delegation, phase gates, and operational protocols.
AgentTeams is a production-grade multi-agent orchestration platform that manages teams of LLM-powered worker agents on Kubernetes. It uses a central Manager controller that reconciles Custom Resource Definitions (Worker, Team, Human, Manager) with container backends (Docker, K8s), a Matrix chat layer for all agent communication, and an AI Gateway (Higress) for credential isolation. The system supports multiple worker runtimes (OpenClaw, QwenPaw, Hermes, DeepSeek Harness) through a plugin architecture, provides a CLI tool (`agt`) for resource management, and includes human-in-the-loop oversight via Matrix rooms. Key features include STS token-based credential management, role-based authorization, audit logging, file synchronization via MinIO/OSS, and a skill discovery and distribution system. The codebase is heavily tested with unit, integration, and end-to-end tests, but shows moderate technical drift due to legacy runtime coexistence (CoPaw EOL migration) and some duplicated shell scripts across runtimes.
AutoGen is a multi-agent AI framework originally from Microsoft Research, now in maintenance mode and succeeded by Microsoft Agent Framework. The codebase is a large monorepo containing Python packages (autogen-core, autogen-agentchat, autogen-ext, autogen-studio, agbench) and a .NET implementation (Microsoft.AutoGen.*), with Python as the primary language. The architecture is layered: Core provides event-driven agent runtime, message passing, and distributed infrastructure via gRPC; AgentChat offers higher-level multi-agent teams and patterns; Extensions integrate external services (OpenAI, Azure, MCP, GraphRAG, etc.); Studio is a FastAPI web UI with a Gatsby frontend for no-code agent prototyping. Key entry points include AssistantAgent, group chat managers, and various team orchestrators. The system relies heavily on LLM clients, Pydantic models, gRPC for distributed runtimes, and OpenTelemetry for tracing. Despite the maintenance mode status, the code shows solid engineering with clear separation of concerns, extensive test suites, and well-structured packages. However, the ecosystem is in transition, with active development shifted to the successor framework.