Harness Engineering Mastery Guide
When a coding agent fails, the model is rarely the cause. What surrounds it is. This guide teaches the harness in ten short modules: an instruction file the agent reads, memory that outlives the session, one feature at a time, verification it cannot argue with, and loops that prompt it for you. Comes with 12 template files to paste into any repo. Works with Claude Code, Codex and any agent that reads a repository. Free.

















