create-plan skill is inaccessible to Codex after being moved to .experimental

What version of Codex is running?

0.77

What subscription do you have?

Team

Which model were you using?

gpt-5.2-codex

What platform is your computer?

_No response_

What issue are you seeing?

PR#8374 in the 0.77 release moved the create-plan skill from the default list to the skills/.experimental folder in the skills repo. Codex isn't instructed to access skills in .experimental, so the plan skill no longer appears or can be installed using the skill-installer workflow.

What steps can reproduce the bug?

1. Install Codex 0.77.
2. Try to list or install the plan skill from the curated list.
3. Observe that the plan skill is missing

What is the expected behavior?

The plan skill should be accessible in the curated workflow, or there should be a documented path to list and install skills from skills/.experimental.

Additional information

I opened a PR with a minimal change that documents and surfaces the existing experimental skills path with skill-installer.
PR: Link

Verified locally by listing experimental skills via $skill-installer --path skills/.experimental.