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-manifest-detection/BRIEF.md

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+# BRIEF — mde-manifest-detection
+
+**Parent:** model-divergence-enforcement
+**Subtask:** 1 of 3 (foundational, no deps)
+**Spec ref:** `tasks/model-divergence-enforcement/SPEC.md` §Subtask 1
+**Design ref:** `design/framework/technical.md` §§2-3
+
+## Objective
+
+Create the model manifest system (`models.json` schema + loader) and model detection
+script (`scripts/detect_models.py`). This is the foundation for all model-divergence
+enforcement — subtasks 2 and 3 depend on it.
+
+## Deliverables
+
+1. `scripts/detect_models.py` — probes opencode.json providers + localhost endpoints
+   (8080/11434/1234/8000), emits candidate manifest as JSON to stdout
+2. `scripts/status.py` — add `_load_models_manifest()` and `_get_mode()` helpers
+3. `scripts/install.sh`, `update.sh`, `upgrade.sh` — call detect_models after vram_detect
+4. `config.md` — `## Available Models` section template
+5. `prompts/onboarding.md` — Step 2d model config check
+6. `tests/test_model_divergence.py` — manifest loading, single vs multi mode, missing file
+
+## Acceptance
+
+- `models.json` missing → `_get_mode()` returns `"single"`, all model commands are no-ops
+- `models.json` with 0-1 models → `"single"` mode
+- `models.json` with 2+ models → `"multi"` mode
+- `detect_models.py` probes localhost and prints candidate JSON
+- `pytest tests/ -q` green