Update Skills

Edit Claude Code skills with zero information loss. Covers three operations:

• backport: reconcile two collections. Pull missing content from a source dir (typically ~/.claude/skills/) into a public marketplace (typically plugins/<plugin>/skills/), or the reverse, scrubbing proprietary references.
• promote: publish a source-only skill into a marketplace plugin.
• edit-in-place: improve, clean, restructure, or "de-yak" an existing skill without dropping any of its content. This operation has no other owner, and it is where silent information loss happens. A "tighten this skill" request quietly deletes a checklist, a numeric threshold, or a rule, and the edit gets certified "lossless" without anyone diffing it. The Preservation Audit (gate, below) exists to make that impossible.

Whatever the operation, the Preservation Audit is the mandatory gate before any edit is done. See the phase below. Surface checks (lint, cross-refs, proprietary scan) come after, and never substitute for it.

When to use

• A user's local global skills have diverged from a public plugin marketplace.
• A new local-only skill should be promoted to a marketplace plugin.
• A marketplace plugin needs its READMEs / skill counts updated after promotions.
• An existing skill needs editing, tightening, restructuring, or "yak-shaving removed" in place, without losing content.

Inputs