A minimal working example of a two-level agent harness: rules/subagents, control plane (WI/ACL), and guards (detectors + eval). Accompanies an article about harness engineering.
4 files for Claude Code, Codex, Cursor and OpenCode: verification-before-completion, code-reviewer, developer, agent-harness-reference AGENTS.md — 284 tokens loaded in every session.
AGENTS.md A 284 tok .agents/skills/verification-before-completion/SKILL.md A 27 tok .cursor/agents/code-reviewer.md A 29 tok .cursor/agents/developer.md A 30 tok These files are naimax/agent-harness-reference's own configuration — they tell Claude Code, Codex, Cursor and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.