Add two tests: - TestAddWithOptions_HasAgentsMD: verifies AGENTS.md exists in worktree after creation when it's in git - TestAddWithOptions_AgentsMDFallback: verifies fallback copy works when AGENTS.md is not in git but exists in mayor/rig Fixes: gt-sq1.3 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>