Verify the entire toolkit against a disposable HubSpot developer test account or sandbox that you bring: seed synthetic fixtures, run every scripted skill's read path, exercise end-to-end and API round-trip cases, produce a graded report, and tear everything down. Hard-refuses to run against production.
Install
npx skills add TomGranot/hubspot-admin-skills --skill sandbox-self-testnpx skills add TomGranot/hubspot-admin-skills --skill sandbox-self-test -a claude-code -gnpx skills add TomGranot/hubspot-admin-skills --skill sandbox-self-test -a codex -ggemini skills install https://github.com/TomGranot/hubspot-admin-skills.git --path skills/sandbox-self-testgh skill install TomGranot/hubspot-admin-skills sandbox-self-testgit clone --depth 1 https://github.com/TomGranot/hubspot-admin-skills /tmp/TomGranot__hubspot-admin-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/TomGranot__hubspot-admin-skills/skills/sandbox-self-test ~/.claude/skills/sandbox-self-test # Claude Code
cp -R /tmp/TomGranot__hubspot-admin-skills/skills/sandbox-self-test ~/.agents/skills/sandbox-self-test # Codex, Cursor, Gemini CLI, Copilot, OpenCode