fix(release): ignore fork PRs in bump guard

.github/workflows/dev-version-bump.yml

@@ -102,7 +102,10 @@ jobs:
           # leaves the branch check passing, so the job would recreate the branch and then
           # fail on `gh pr create` with "already exists" — turning a successful release red
           # for a repair that was already queued.
-          open_prs="$(gh pr list --base dev --head "${branch}" --state open --json number --jq 'length')"
+          # `--head` matches only the branch name, including identically named fork
+          # branches. Count only pull requests whose head belongs to this repository;
+          # otherwise a fork can pre-open the predictable branch and suppress the bump.
+          open_prs="$(gh pr list --base dev --head "${branch}" --state open --json number,isCrossRepository --jq '[.[] | select(.isCrossRepository == false)] | length')"
           if [ "${open_prs}" != "0" ]; then
             echo "::notice::a bump pull request for ${branch} is already open; nothing to do"
             exit 0

tests/bump-dev-version.test.ts

@@ -13,6 +13,7 @@ import { decideDevVersion } from "../scripts/bump-dev-version";
  */
 
 const CLI = new URL("../scripts/bump-dev-version.ts", import.meta.url).pathname;
+const WORKFLOW = new URL("../.github/workflows/dev-version-bump.yml", import.meta.url).pathname;
 
 function tempPackageJson(version: string): string {
   const dir = mkdtempSync(join(tmpdir(), "ocx-bump-"));
@@ -32,6 +33,12 @@ function tempPackageJson(version: string): string {
 }
 
 describe("dev version bump rule", () => {
+  test("the idempotency check ignores same-named pull requests from forks", () => {
+    const workflow = readFileSync(WORKFLOW, "utf8");
+    expect(workflow).toContain("--json number,isCrossRepository");
+    expect(workflow).toContain("select(.isCrossRepository == false)");
+  });
+
   test("a stable release moves dev to the next minor", () => {
     // e4a85d134 (2.33.0 -> 2.34.0) and 076ad3036 (2.34.0 -> 2.35.0).
     expect(decideDevVersion("2.36.0", "2.36.0")).toMatchObject({ changed: true, version: "2.37.0" });