[rlx]

What this does

• The skill's description leads with when to load it: before a migration, a backfill, a deploy, or a
  command against a deployed environment.
• skills/uplevel/LICENSE: an installed copy carries the license text, and the gate keeps it
  identical to the one at the root.
• release-gates.md: an image or archive that carries more than the source.
• code-scan.md no longer says it is unvalidated.
• scripts/check-behavior.sh has a fifth case that asks for a migration without naming the skill.
• SECURITY.md lists all nine executable files.

Version 0.86.0.

If it adds or changes a check

• Watched it fail, then pass
• Recorded it in .claude/guardrails.yml

If it changes anything under skills/uplevel/

• version: bumped in SKILL.md
• CHANGELOG.md entry written in this change
• Every command it ships was run here and observed to work
• Ran ./scripts/check-behavior.sh