## Why
Codex agents that modify GitHub Actions configuration need clear
guidance when repository push protections require temporary approval.
Without it, an agent may pursue an unavailable exemption or stop before
checking whether the user already has access.
## What
Add a `pushing-ci-changes` skill that explains the restriction, directs
agents to attempt the push first, and tells them how to involve the user
when approval is required.
## Validation
Not run; this change only adds skill documentation.
