Building a Claude Code Agent Harness: Beyond Instructions to a Working System

How an Agent Harness Made My Claude Code Setup 10x More Reliable

TLDR: Adding a CLAUDE.md and a few commands to Claude Code is only the first step. The real reliability comes from building a harness around the model: persistent memory for repeated corrections, hooks for mechanical checks, parallel agents for distinct tasks, and a review layer before you ever look at the output.

How an Agent Harness Made My Claude Code Setup 10x More Reliable