diff --git a/.changeset/fix-quarantine-json-gate-mode.md b/.changeset/fix-quarantine-json-gate-mode.md
new file mode 100644
index 0000000000..ec95885b31
--- /dev/null
+++ b/.changeset/fix-quarantine-json-gate-mode.md
@@ -0,0 +1,5 @@
+---
+"@runfusion/fusion": patch
+---
+
+Stop edits to `scripts/lib/test-quarantine.json` from forcing `pnpm test` into gate mode. The quarantine list is runtime data, not executable test infra; tripping the shared-infra catch-all dropped affected-package coverage, so a dev's real changes went untested whenever they also touched the quarantine list. Quarantine edits now stay in changed mode and run the affected packages.
diff --git a/scripts/__tests__/test-changed.test.mjs b/scripts/__tests__/test-changed.test.mjs
index 90df9ccd36..27bc3e0ab2 100644
--- a/scripts/__tests__/test-changed.test.mjs
+++ b/scripts/__tests__/test-changed.test.mjs
@@ -148,6 +148,26 @@ test("isSharedInfraChange: returns false for .fusion artifacts", () => {
   assert.equal(isSharedInfraChange([".fusion/tasks/FN-5157/PROMPT.md"]), false);
 });
 
+test("isSharedInfraChange: returns false for the test-quarantine data list", () => {
+  // FN: editing scripts/lib/test-quarantine.json (a runtime data list of
+  // quarantined tests, not executable infra) previously tripped the root
+  // catch-all and forced gate mode, which DROPS affected-package coverage.
+  assert.equal(isSharedInfraChange(["scripts/lib/test-quarantine.json"]), false);
+});
+
+test("isSharedInfraChange: quarantine edit plus package change stays changed-only", () => {
+  // A quarantine-list edit alongside real package work must keep the diff in
+  // changed mode so the changed packages actually get tested.
+  assert.equal(
+    isSharedInfraChange([
+      "scripts/lib/test-quarantine.json",
+      "packages/core/src/productivity-analytics.ts",
+      "packages/dashboard/app/components/QuickEntryBox.tsx",
+    ]),
+    false,
+  );
+});
+
 test("isSharedInfraChange: still returns true for root config edges", () => {
   for (const file of ["tsconfig.json", ".npmrc", "Dockerfile"]) {
     assert.equal(isSharedInfraChange([file]), true, `${file} should still force the full suite`);
diff --git a/scripts/test-changed.mjs b/scripts/test-changed.mjs
index 34a3f3baea..2625912de0 100644
--- a/scripts/test-changed.mjs
+++ b/scripts/test-changed.mjs
@@ -604,6 +604,14 @@ function isTestIrrelevantRootPath(file) {
     return true;
   }
 
+  // The quarantine list is runtime DATA (which tests are skipped), not
+  // executable test infra. Editing it must not trip the root catch-all below
+  // and force gate mode — gate mode drops affected-package coverage, so a
+  // dev's real changes would go untested just because they touched the list.
+  if (file === "scripts/lib/test-quarantine.json") {
+    return true;
+  }
+
   return ["README", "CHANGELOG.md", "LICENSE", "LICENSE.md"].includes(file);
 }