fix: patch checks full target span + marker injection/integrity (algo #8)

tests/unit/test_evolve.py

@@ -309,6 +309,36 @@ class TestValidateSkill:
         result = validate_skill(orig, "no frontmatter body")
         assert not result.passed
 
+    def test_unpaired_appendix_marker_fails(self) -> None:
+        """evolved 出现孤立 APPENDIX_START（无配对 END）→ marker 完整性校验失败。"""
+        orig = "---\nname: a\ndescription: d\ntask_type: t\n---\nbody body body"
+        evol = f"---\nname: a\ndescription: d\ntask_type: t\n---\nbody {APPENDIX_START} body"
+        result = validate_skill(orig, evol)
+        assert not result.passed
+        assert any("marker" in e.lower() or "配对" in e for e in result.errors)
+
+    def test_duplicate_momentum_marker_fails(self) -> None:
+        """evolved 出现两对 MOMENTUM marker → 完整性校验失败（各至多一对）。"""
+        orig = "---\nname: a\ndescription: d\ntask_type: t\n---\nbody body body"
+        evol = (
+            "---\nname: a\ndescription: d\ntask_type: t\n---\n"
+            f"{MOMENTUM_START}x{MOMENTUM_END} mid {MOMENTUM_START}y{MOMENTUM_END}"
+        )
+        result = validate_skill(orig, evol)
+        assert not result.passed
+        assert any("marker" in e.lower() or "配对" in e for e in result.errors)
+
+    def test_paired_markers_pass(self) -> None:
+        """evolved 含成对 appendix+momentum marker（各一对，顺序正确）→ 校验通过。"""
+        body = "body " * 20
+        orig = f"---\nname: a\ndescription: d\ntask_type: t\n---\n{body}"
+        evol = (
+            f"---\nname: a\ndescription: d\ntask_type: t\n---\n{body}"
+            f"{APPENDIX_START}\n- n\n{APPENDIX_END}\n{MOMENTUM_START}\nm\n{MOMENTUM_END}"
+        )
+        result = validate_skill(orig, evol)
+        assert result.passed, result.errors
+
 
 class TestValidateSystem:
     """validate_system 测试。"""