Flock mode has been superseded by the studio multi-agent workspace manager. Changes: - Remove g3-ensembles crate entirely - Remove --project, --flock-workspace, --segments, --flock-max-turns CLI flags - Remove run_flock_mode() from autonomous.rs - Remove flock-related tests from cli_integration_test.rs - Update README.md, docs/architecture.md, analysis/memory.md - Delete docs/FLOCK_MODE.md