Wire execute-phase to invoke transition.md inline when --auto flag or workflow.auto_advance config is set, propagate --auto through transition to next phase invocations, add config-get command to gsd-tools, and fix broken "config get" calls to use hyphenated "config-get" subcommand. Closes #344 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>