Summary

Adds harness, a meta-skill for designing specialized subagent teams in the Codex CLI environment. It generates .codex/agents/*.toml agent definitions, .agents/skills/ skill bundles, and AGENTS.md configuration from a user's domain description.

What it adds

A single line under ### Development & Code Tools, placed alphabetically between codebase-recon and create-plan/.

Why it fits

• Trigger phrases work via the description frontmatter (e.g., "set up codex harness", "build codex harness for {domain}")
• Closest peers already listed as external repos: Bernstein, AuraKit, Vibe-Skills
• Self-contained — installs to ~/.codex/skills/ with no external services required

Notable design points

• 7 orchestration patterns: pipeline, fan-out/fan-in, expert pool, producer-reviewer, supervisor, hierarchical, handoff
• Durable execution: workflows resume after context reset via _workspace/checkpoint.json
• Zero-dependency state manager that parses JSON Schema at runtime as the single source of truth
• Verifiable exit conditions — natural-language termination keywords are rejected at validation

Tested

• Install verified via the standard skill-installer flow
• Works with the latest Codex CLI

Checklist

• Skill description states clearly when Codex should trigger it
• Metadata fits within context limits (description ≤ 1024 chars)
• Install instruction included
• Alphabetical placement within section