Verify harness changes end-to-end without docker — drive the real pinned CLI against a header-capturing stub server with the exact env resolve_auth_env() produces.
Install
npx skills add anthropics/defending-code-reference-harness --skill verifynpx skills add anthropics/defending-code-reference-harness --skill verify -a claude-code -gnpx skills add anthropics/defending-code-reference-harness --skill verify -a codex -ggemini skills install https://github.com/anthropics/defending-code-reference-harness.git --path .claude/skills/verifygh skill install anthropics/defending-code-reference-harness verifygit clone --depth 1 https://github.com/anthropics/defending-code-reference-harness /tmp/anthropics__defending-code-reference-harness
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/anthropics__defending-code-reference-harness/.claude/skills/verify ~/.claude/skills/verify # Claude Code
cp -R /tmp/anthropics__defending-code-reference-harness/.claude/skills/verify ~/.agents/skills/verify # Codex, Cursor, Gemini CLI, Copilot, OpenCode