[变更性质] 执行假设移出用户面 warnings：result 独立 assumptions 字段承载，worker 侧守门测试断言 EXECUTION_ASSUMPTIONS 不再拼入 warnings

2 files changed, 14 insertions, 2 deletions

diff --git a/tests/worker/test_backtest.py b/tests/worker/test_backtest.py
index 30f8e46..cb248ec 100644
--- a/tests/worker/test_backtest.py
+++ b/tests/worker/test_backtest.py
@@ -103,6 +103,18 @@ def test_synthetic_labeled_runs_next_bar_fill(tmp_path):
     assert abs(t["commission"] - t["value"] * 0.0003) < 1e-6
 
 
+def test_assumptions_out_of_warnings(tmp_path):
+    """执行假设说明移出用户面 warnings，独立 assumptions 字段承载。"""
+    from worker.backtest import EXECUTION_ASSUMPTIONS
+    req, _ = make_request(tmp_path, STRAT)
+    res = run_backtest(req)
+    assert res["assumptions"] == EXECUTION_ASSUMPTIONS
+    for w in res["warnings"]:
+        assert "execution assumptions" not in w
+        for k in EXECUTION_ASSUMPTIONS:
+            assert str(k) not in w
+
+
 def test_equity_cash_accounting(tmp_path):
     req, _ = make_request(tmp_path, STRAT)
     res = run_backtest(req)
diff --git a/worker/backtest.py b/worker/backtest.py
index 489ee9a..c9d6ffc 100644
--- a/worker/backtest.py
+++ b/worker/backtest.py
@@ -277,8 +277,7 @@ def run_backtest(request: dict) -> dict:
                               "count": n})
         warnings.append(f"broker rejected {n} order(s) for {sym}: {reasons.get(reason, reason)}")
 
-    warnings.append("execution assumptions: "
-                    + "; ".join(f"{k}: {v}" for k, v in EXECUTION_ASSUMPTIONS.items()))
+    assumptions = dict(EXECUTION_ASSUMPTIONS)
     rows = rec["rows"]
 
     benchmark_symbol = cfg.get("benchmark_symbol")
@@ -349,6 +348,7 @@ def run_backtest(request: dict) -> dict:
             f"final equity: {metrics['final_equity']}",
         ],
         "warnings": warnings,
+        "assumptions": assumptions,
         "execution_assumptions": EXECUTION_ASSUMPTIONS,
         "elapsed_ms": int((time.monotonic() - t0) * 1000),
         "peak_rss_kb": int(resource.getrusage(resource.RUSAGE_SELF).ru_maxrss),