Phase 05: Subagent Codebase Analysis - 2 plans in 2 waves - Plan 05-01: Create gsd-entity-generator subagent (Wave 1) - Plan 05-02: Refactor analyze-codebase to use subagent (Wave 2) - Ready for execution Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>