Agentic AI Harness Pattern
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Home > Computing and Information Technology Books > Computer Science Books > Artificial intelligence > Neural networks and fuzzy systems > Agentic AI Harness Pattern: The Top 15 Patterns Learned from Leaked Claude Code and Hermes Agent
Agentic AI Harness Pattern: The Top 15 Patterns Learned from Leaked Claude Code and Hermes Agent

Agentic AI Harness Pattern: The Top 15 Patterns Learned from Leaked Claude Code and Hermes Agent


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About the Book

Most AI tutorials teach you prompts. This book teaches you patterns.


Production AI engineering - the discipline of turning a language model into something reliable, safe, auditable, and shippable - is mostly undocumented. The libraries churn every quarter. The patterns endure.


Agentic AI Harness Pattern distills 15 of those patterns by reading two mature production codebases side by side: Claude Code, Anthropic's TypeScript CLI for agentic coding, and Hermes, a Python agent built to run across messaging platforms. The two systems make different language choices, different concurrency choices, and different deployment choices - but the harness pattern they implement is the same.


Every chapter follows the same rhythm:


  • Name the pattern. What problem is the harness solving?

  • Show Claude Code's implementation in real TypeScript.

  • Show Hermes's implementation in real Python.

  • Compare them as a table. Where do they diverge, and why?

  • Recommend when to use which. A decision rule, not a hot take.

  • Apply the pattern to a defensive cyber-security agent. A worked example that shows the pattern under operational pressure.
Inside the 15 patterns

  1. The Harness Paradigm - why a model alone is not a product

  2. Tool Architecture and the Tool Contract - the boundary between reasoning and consequence

  3. The Query / Agent Loop - what happens between the model's tool call and the next turn

  4. Permission Systems and Safety Guardrails - gating the destructive set

  5. Tool Orchestration and Execution - partitioning safe vs. serial work

  6. Context Management at Scale - the five strategies before compaction

  7. Multi-Agent Coordination - when one agent isn't enough

  8. Memory Systems and State Persistence - three tiers, one cache

  9. Observability and Debugging - distributed tracing for non-deterministic systems

  10. Production Deployment Patterns - SDK-first vs. gateway-first

  11. Hook / Event-Driven Automation - the layer above the loop

  12. The Skill System Pattern - capabilities as content, not code

  13. MCP Integration - connecting agents to the world

  14. Model Routing and Provider Abstraction - falling back without falling over

  15. Structured Output and Schema-Constrained Generation - when free text isn't enough
Who this book is for

  • Engineers building AI products who keep hitting the same architectural questions and want vetted answers.

  • Architects and tech leads making the build-vs-buy-vs-wrap decision for an agent platform.

  • Security and compliance reviewers who need to understand how a production agent enforces a destructive-action gate, an audit trail, and an iteration budget.

Each chapter stands alone. Read what you need; read end-to-end and the patterns compound. Either way, you'll close the book with a working mental model of how to design an AI agent that survives contact with production.

About the authors
Ken Huang is CEO of DistributedApps.ai, advising organizations on production-grade agent deployment at the intersection of AI, distributed systems, and security.


Grace Huang is a Product Manager and AI Engineer at PIMCO, where she ships AI features for the world's largest fixed-income asset manager. Her focus is the engineering rigor that makes AI products trustworthy in regulated environments.


The model is intelligence. The harness is the system.

Start here.


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Product Details
  • ISBN-13: 9798196177972
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Height: 279 mm
  • No of Pages: 290
  • Returnable: N
  • Sub Title: The Top 15 Patterns Learned from Leaked Claude Code and Hermes Agent
  • Width: 216 mm
  • ISBN-10: 8196177976
  • Publisher Date: 09 May 2026
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 15 mm
  • Weight: 725 gr


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