- Renamed sisyphus_agent.builder_enabled to default_builder_enabled for clarity - Removed sisyphus_agent.replace_build option entirely - Default build agent is now always demoted to subagent mode when Sisyphus is enabled - Updated schema and regenerated JSON schema - Updated all documentation (EN, KO, JA, ZH-CN) BREAKING CHANGE: Configuration migration required for users using builder_enabled or replace_build options. Closes #250 Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>