Install Skills in Codex

Use Fygment CLI setup, install, check, and update flows for Codex-targeted Skill usage.

Audience: Codex users who want workspace-approved Skills in their local harness.
Updated: 2026-05-20

Codex is one of the first writable install targets. Use the guided CLI path so Fygment can preview config changes and track install state.

Codex setup commands

npx fygmentAlpha

Start guided setup, sign in, choose a workspace, and select Codex as a local target.

fygment install --target=codex <skill-slug>Alpha

Install one approved Skill into the Codex target after package checksum verification.

fygment check --target=codexAlpha

Compare local Codex installs against current workspace-approved versions.

Local safety

Review config edits before writing

The guided setup path should preview target config changes before writing. Do not hand-edit local harness JSON as the default path when the guided setup can own it.

Related docs

CLI reference
The CLI is the local bridge between a governed workspace and writable AI harness targets. Use it for setup, install state, update checks, readiness, and selected imports.
Set up Fygment MCP
MCP setup gives AI clients access to workspace-scoped Fygment tools. Hosted clients use OAuth; local clients use guided setup and a local authenticated proxy where needed.
Review and approve Skills
Governance is the difference between a shared Skill library and a loose pile of files. Review decisions decide what can be installed and trusted.