Source-guided analysis of Claude Code and Codex
Runtime Discipline
A close reading of Claude Code's runtime structure, focused on control planes, continuity, recovery paths, and verification work split.
Best for readers who want the full frame first. It asks why an agent system grows organs such as a query loop, permission checks, context governance, and team rules. If a system is meant to stay composed, someone has to handle the messy endings.
Comparative Harness
A comparison of Claude Code and Codex through control planes, state, policy, and local governance.
Best for readers who already know coding-agent tools and want the architectural split and selection logic directly. The real comparison is where control, state discipline, and organizational rules actually live.
Harness engineering is about control structure. It asks how the control plane, query loop, permissions, recovery, verification, state, and local governance work together to keep an agent system bounded and accountable.
These books cover the Claude Code runtime, Claude Code vs Codex, coding-agent architecture, recovery paths, verification discipline, approval policy, and context governance.
Harness Books is the public home of these two books. AgentWay is a related but separate practice platform, not the hidden continuation of this site.