Harness Codex Marketplace

Official Codex Plugin Directory publishing is not yet self-serve. Harness is currently distributed through this GitHub-backed Codex marketplace.

Install:

codex plugin marketplace add https://github.com/EvanAI0331/harness-codex-marketplace.git --ref v0.1.8

Harness is the workflow framework for custom Codex agent systems. It turns custom workflows into role-bound, execution-bound, output-bound harnesses with specs, artifacts, traces, MCP tools, and fail-closed verification.

Plugin source:

• plugins/harness-codex-plugin/

Marketplace manifest:

• .agents/plugins/marketplace.json