/simplify skill is undocumented and has no changelog/release-note entry

\/simplify\ exists as a real bundled skill in current Claude Code builds (confirmed present in the \claude\ binary strings, v2.1.283), with the tool description:

Review the changed code for reuse, simplification, efficiency, and altitude cleanups, then apply the fixes. Quality only — it does not hunt for bugs; use \/code-review\ for that.

However, it appears nowhere in official channels:

• Not in the Commands reference (which does list \/code-review\, \/doctor\, \/batch\, \/debug\, \/loop\, etc.)
• Not in the Skills docs bundled-skills table
• Not in the What's New weekly digest, through Week 37 (v2.1.263–v2.1.269)
• Not in \CHANGELOG.md\ (retains history back to v2.1.275)
• Not in GitHub Releases notes, checked back through v2.1.246

Could you confirm whether \/simplify\ is an intentional silent/gated rollout, or a documentation gap that should be filled in (commands reference + a changelog entry)?