Instead of injecting the full SKILL.md body as additionalContext, inject
"You must run the Skill(<name>) tool." — a more conventional way of
telling the agent to use the Skill tool for context loading.
Refine SKILL.md content across 29 skills based on live eval findings from 16
benchmark sessions. Add .claude/skills/vercel-plugin-eval/ for running real-world
plugin eval sessions with debug log monitoring. Update posttooluse-validate and
validate-rules tests to match refined skill content.