Codex Harness

Creates a structured control plane for Codex CLI managing execution contracts, persistent project knowledge, verification records, and evaluation frameworks.

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.