test(audit): lock drift reaction-threshold script wiring

Assert package drift and rolling commands keep reaction match/skip threshold flags in default cadence wiring. Architecture/protocol diagrams reviewed; no updates needed for test-only coverage.

docs/plans/state.json

@@ -570,6 +570,17 @@
       ],
       "test_status": "pnpm test:run src/audit/artifactTag.test.ts src/audit/phase0BaselineDrift.test.ts + pnpm typecheck passing"
     },
+    "phase0-live-baseline-drift-script-reaction-threshold-wiring-coverage": {
+      "status": "completed",
+      "date": "2026-02-27",
+      "updated": "2026-02-27",
+      "summary": "Extended package-script wiring regression coverage to assert default drift/rolling commands keep reaction delta thresholds (`--max-reaction-match-rate-drop-pp`, `--max-reaction-skip-rate-increase-pp`) enabled.",
+      "files_modified": [
+        "src/audit/phase0BaselineScriptWiring.test.ts",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/audit/phase0BaselineScriptWiring.test.ts + pnpm typecheck passing"
+    },
     "phase0-instrumentation-ticket-checklist": {
       "status": "completed",
       "date": "2026-02-25",

src/audit/phase0BaselineScriptWiring.test.ts

@@ -33,4 +33,18 @@ describe('phase0 baseline script wiring', () => {
     expect(rollingPrune).toContain('pnpm audit:phase0-baseline:live:refresh:drift:rolling');
     expect(rollingPrune).toContain('--report-tag "$TAG"');
   });
+
+  it('keeps default drift thresholds for reaction match/skip deltas', () => {
+    const scripts = loadPackageScripts();
+    const drift = scripts['audit:phase0-baseline:live:drift'];
+    const rolling = scripts['audit:phase0-baseline:live:refresh:drift:rolling'];
+
+    expect(drift).toBeDefined();
+    expect(drift).toContain('--max-reaction-match-rate-drop-pp 50');
+    expect(drift).toContain('--max-reaction-skip-rate-increase-pp 50');
+
+    expect(rolling).toBeDefined();
+    expect(rolling).toContain('--max-reaction-match-rate-drop-pp 50');
+    expect(rolling).toContain('--max-reaction-skip-rate-increase-pp 50');
+  });
 });