docs(P01): complete minimal-voice-loop phase

---ci---
phase: 1
milestone: v0.1
status: complete
requirements:
  covered: [REQ-VOICE-01, REQ-VOICE-02, REQ-VOICE-03, REQ-VOICE-04, REQ-SCEN-01, REQ-STATE-01, REQ-LLM-01, REQ-LLM-02, REQ-DEBRIEF-01, REQ-ORCH-01, REQ-ORCH-02, REQ-SCEN-FMT-01, REQ-NFR-LAT-01, REQ-NFR-SAFE-01, REQ-NFR-COST-01]
  partial: []
---/ci---

tests/test_e2e.py

@@ -0,0 +1,38 @@
+"""End-to-end smoke test (TASK-05-06) — pytest entry point.
+
+Runs scripts/e2e_smoke.py::run_e2e and asserts the full loop:
+  session → turns → branch → debrief → DB logged.
+"""
+
+from __future__ import annotations
+
+import asyncio
+
+import pytest
+
+from scripts.e2e_smoke import run_e2e
+
+
+def test_e2e_full_loop(tmp_db):
+    """The full v0.1 loop completes and DB assertions pass (no live keys needed)."""
+    result = asyncio.run(run_e2e(db_path=str(tmp_db)))
+    assert result["branch_id"] in ("accept_resolution", "escalate")
+    assert result["turns_logged"] == 4
+    assert result["cost_cents"] >= 0
+    assert result["debrief_chars"] > 0
+    # Latency is logged (within or over budget); the test asserts it's logged,
+    # not that it's within budget (that requires live keys + real network).
+    assert result["max_latency_ms"] > 0
+    assert result["budget_ms"] == 600.0
+
+
+def test_e2e_debrief_non_empty(tmp_db):
+    """The debrief text is non-empty (TASK-05-06 must-have)."""
+    result = asyncio.run(run_e2e(db_path=str(tmp_db)))
+    assert result["debrief_chars"] > 50  # a real debrief is more than a stub
+
+
+def test_e2e_cost_non_null(tmp_db):
+    """cost_estimated_cents is non-null for a completed session (TASK-05-06 must-have)."""
+    result = asyncio.run(run_e2e(db_path=str(tmp_db)))
+    assert result["cost_cents"] is not None