Official Codex Plugin Directory publishing is not yet self-serve. SpecX is currently distributed through this GitHub-backed Codex marketplace.
codex plugin marketplace add https://github.com/EvanAI0331/specx-codex-marketplace.git --ref v0.4.0specx-codex-plugin
SpecX is a governance layer for Codex agents. It turns vague agent tasks into governed execution contracts, verifies execution results against those contracts, and prevents fake success, silent fallback, and uncontrolled agent execution.
The marketplace file is:
.agents/plugins/marketplace.json
The plugin source is pinned to:
ref: v0.4.0
path: ./plugins/specx-codex-plugin