Completes all 3 model-divergence enforcement subtasks: - scripts/detect_models.py: probes opencode.json + localhost endpoints, builds models.json with --json/--write/--force - scripts/status.py: CONFLICT_MATRIX, --model flag, --transition --model, --claim --model, --audit Category 6, model-divergence brake gate in --check-gate, helpers for manifest loading and conflict checking - scripts/loop-runner.py: _role_model() helper + {model} passed via extras dict to _invoke_harness for implement, verify, orchestrate roles - tests/test_model_divergence.py: 33 tests covering all enforcement layers - Single-LLM mode: record model advisory, no conflict check - Multi-LLM mode (2+ models): conflict matrix enforced at transition, claim, and loop brake gate - Project-level models.json preferred over global ~/.automaton/models.json