ci: [CI-01] verify identical tarballs on three Node runtimes

refactor/risks.json

@@ -4496,6 +4496,24 @@
       ],
       "compatibleResolution": "Preserve actual historical JS default/direct forms and validate their declared module views independently.",
       "closureCriteria": "Installed CJS/ESM/global/legacy consumers and public types preserve the supported historical forms."
+    },
+    {
+      "id": "CORE-DEFAULTS-SSR-01",
+      "title": "Reading static defaults throws when navigator is absent",
+      "confirmation": "reproduced",
+      "status": "open",
+      "owners": [
+        "CORE-25"
+      ],
+      "evidence": [
+        "test/package/runtime.cjs",
+        "packages/artplayer/src/option/defaults.ts",
+        "refactor/changes/2026-09-13-CI-01-node-consumers.md",
+        "refactor/baselines/node-consumer-validation.json"
+      ],
+      "compatibleResolution": "Read navigator through a guarded global lookup while preserving browser language defaults and public declaration shape.",
+      "closureCriteria": "Published failure remains explicit; source and actual installed candidate defaults work without navigator on selected Node versions and browser language behavior stays unchanged.",
+      "workspaceState": "Node 20.19.0 actual installed probe fails with ReferenceError: navigator is not defined. Published 5.4.0 and candidate 5.4.1 both reproduce under explicitly absent navigator on every selected runtime. CI-01 records this known failure, then compares default values under the same controlled en-US navigator; this is not a production fix."
     }
   ]
 }