ci: expand and raise mutation gate

.github/workflows/ci.yml

@@ -427,7 +427,7 @@ jobs:
           cp mutants/mutmut-cicd-stats.json quality-evidence/mutation-stats.json
           cp mutants/mutmut-stats.json quality-evidence/mutation-test-selection.json
           "$QUALITY_ENV/bin/python" scripts/check_mutation_score.py \
-            quality-evidence/mutation-stats.json --minimum 70
+            quality-evidence/mutation-stats.json --minimum 75
 
       - name: Write normalized quality trend evidence
         if: always()

ci/test-quality-policy.json

@@ -6,7 +6,7 @@
     "changed_line": 90.0,
     "mature_cpu_statement": 80.0,
     "mature_cpu_branch": 75.0,
-    "mutation_score": 70.0,
+    "mutation_score": 75.0,
     "warning_budget": 0
   },
   "critical_cpu_paths": [

pyproject.toml

@@ -117,6 +117,7 @@ markers = [
 source_paths = ["obliteratus/", "scripts/"]
 only_mutate = [
     "obliteratus/config.py",
+    "obliteratus/analysis/numerical_contracts.py",
     "scripts/check_coverage_thresholds.py",
 ]
 pytest_add_cli_args = ["--no-cov", "-q"]
@@ -124,6 +125,7 @@ pytest_add_cli_args_test_selection = [
     "tests/test_config.py",
     "tests/test_config_properties.py",
     "tests/test_coverage_thresholds.py",
+    "tests/test_numerical_contracts.py",
 ]
 mutate_only_covered_lines = true
 on_dependency_change = "rerun"

scripts/check_quality_policy.py

@@ -18,7 +18,7 @@ BASELINE_FLOORS = {
     "changed_line": 90.0,
     "mature_cpu_statement": 80.0,
     "mature_cpu_branch": 75.0,
-    "mutation_score": 70.0,
+    "mutation_score": 75.0,
     "warning_budget": 0.0,
 }
 

tests/test_quality_policy.py

@@ -66,13 +66,13 @@ def test_policy_and_exact_mature_floors_pass():
 
 def test_floor_regression_requires_structured_reviewed_exception():
     policy = _policy()
-    policy["minimums"]["mutation_score"] = 69
+    policy["minimums"]["mutation_score"] = 74
     assert quality.validate_policy(policy) == [
-        "quality minimum mutation_score cannot move below 70 without an explicit reviewed exception",
+        "quality minimum mutation_score cannot move below 75 without an explicit reviewed exception",
     ]
     policy["threshold_exceptions"] = [{
         "threshold": "mutation_score",
-        "new_value": 69,
+        "new_value": 74,
         "reason": "Temporary tool regression",
         "approved_issue": "https://github.com/elder-plinius/OBLITERATUS/issues/999",
         "expires": "2026-09-01",