Guides

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: 2026-10-25

Codex is a writable install target. Use the guided CLI path so Fygment can preview config changes and track install state.

Get the fygment command

Run npm install -g fygment once. After that, run fygment followed by a command, such as fygment setup.

npx fygment <command> also works if you prefer not to install the package. Running npx fygment by itself does not put fygment on your PATH.

Codex setup commands

fygment setup --target=codex

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

Install one approved Skill into the Codex target. Fygment saves the version and checksum so later checks can compare them. In a non-interactive shell, add --yes.

fygment check --target=codex

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, setup checks, 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
Members can use the Skills they import right away. Review is for sharing more widely and for new versions. Each decision is made by someone with authority over that Skill or team, and every version approval re-runs the trust review.