# Codex Harness

> Use this tool when you need to manage and track complex agent tasks, execution contracts, and project knowledge in a local control plane. The Codex Harness provides a comprehensive set of tools for contract lifecycle management, knowledge storage, and verification recording, solving problems related to task auditing, project optimization, and evidence verification. It accepts loose agent tasks as input and outputs auditable loops, execution records, and optimized harness proposals.

Canonical page: https://skillsregistry.net/skills/chapzin-codex-harness  
JSON: https://api.skillsregistry.net/v1/skills/chapzin-codex-harness

## Description

This MCP server provides a local control plane for Codex CLI that transforms loose agent tasks into auditable loops. It maintains execution contracts, persistent project knowledge including research and lessons learned, verification evidence, evaluation case libraries, and harness optimization records. Provides over 25 tools covering contract lifecycle management, knowledge storage and querying, trace and verification recording, evaluation run management, and harness proposal tracking. Written entirely in JavaScript using Node.js built-in modules.

## Trust

- **Trust score (0–1):** 0.00
- **Verification tier:** scanned
- **Last scanned:** 2026-09-01

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** productivity
- **Updated:** 2026-09-01

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/chapzin-codex-harness)
- **Repository:** <https://github.com/chapzin/codex-harness-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "chapzin-codex-harness"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/chapzin-codex-harness` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/chapzin-codex-harness/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt