Bootstrap self-improvement loop, decompose model-divergence-enforcement

Self-improvement loop:
- Created via --create-loop --from-template self-improvement
- Scheduled via launchd (3600s interval)
- State: running

model-divergence-enforcement task:
- Research approved, decomposed into 3 sequential subtasks:
  1. mde-manifest-detection (models.json + detect_models.py)
  2. mde-interactive-enforcement (conflict matrix + --model args + audit)
  3. mde-loop-enforcement (loop.json roles + {model} substitution + check-gate)
- Parent at decomposition:approved (stays active until subtasks complete)
- Each subtask has BRIEF.md with scope, deliverables, acceptance criteria

tasks/model-divergence-enforcement/subtasks/mde-interactive-enforcement/.state

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+new

tasks/model-divergence-enforcement/subtasks/mde-interactive-enforcement/BRIEF.md

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+# BRIEF — mde-interactive-enforcement
+
+**Parent:** model-divergence-enforcement
+**Subtask:** 2 of 3 (depends on mde-manifest-detection)
+**Spec ref:** `tasks/model-divergence-enforcement/SPEC.md` §Subtask 2
+**Design ref:** `design/framework/technical.md` §§4-5, §12
+
+## Objective
+
+Add the conflict matrix, `--transition --model` / `--claim --model` enforcement,
+`.state.models` tracking, audit category, and dashboard model badges. This is the
+core enforcement layer for interactive (non-loop) workflows.
+
+## Deliverables
+
+1. `scripts/status.py`:
+   - `CONFLICT_MATRIX` constant (locked matrix from SPEC)
+   - `_check_conflict(current_phase, current_model, next_phase, next_model)` helper
+   - `cmd_transition`: `--model` arg + conflict check in multi-LLM mode
+   - `cmd_claim`: `--model` arg + conflict check
+   - `cmd_audit`: `model_divergence` category
+   - `.state.models` writer (JSON: `{implementer, code_reviewer, bug_hunter, ...}`)
+2. `automaton/dashboard/html/dashboard.js` — model badge on task cards
+3. `automaton/dashboard/ui/app.py` — `.state.models` in `/api/tasks` response
+4. `tests/test_model_divergence.py` — conflict matrix, auto-assign, audit, badges
+
+## Acceptance
+
+- Single-LLM mode: `--model` records but never refuses (advisory once if `advised: true`)
+- Multi-LLM mode: `--transition --model` refuses on conflict (e.g., same model for implement + code_review)
+- Multi-LLM mode: `--claim --model` refuses on conflict
+- `--audit` flags `model_divergence` violations
+- Dashboard shows model badges when `.state.models` exists
+- `pytest tests/ -q` green