diff --git a/.github/scripts/pr-readiness/test.mjs b/.github/scripts/pr-readiness/test.mjs
index 0f9ffab..bc20033 100644
--- a/.github/scripts/pr-readiness/test.mjs
+++ b/.github/scripts/pr-readiness/test.mjs
@@ -55,7 +55,50 @@ const context = {
 const blockerCodes = (readiness) => (
   readiness.deterministic_blockers.map((item) => item.code)
 );
+const closingChildren = Array.from({ length: 31 }, (_, index) => ({
+  ...input.linked_issues[0],
+  number: 101 + index,
+  parent_number: 100,
+}));
+const manyLinkedIssues = [{
+  ...input.linked_issues[0],
+  number: 100,
+  issue_type: "Task",
+  body: taskBody,
+  sub_issue_count: closingChildren.length,
+  sub_issues: closingChildren.map((issue) => ({
+    repository: issue.repository,
+    number: issue.number,
+    state: issue.state,
+  })),
+}, ...closingChildren];
+const manyLinkedIssuesInput = {
+  ...input,
+  linked_issues: manyLinkedIssues,
+  linked_issue_count: manyLinkedIssues.length,
+};
+const scriptDirectory = path.dirname(new URL(import.meta.url).pathname);
+const verifySource = fs.readFileSync(
+  path.join(scriptDirectory, "verify.mjs"),
+  "utf8",
+);
+const workflowSource = fs.readFileSync(
+  path.join(scriptDirectory, "..", "..", "workflows", "codex-openai-review.yml"),
+  "utf8",
+);
+for (const source of [verifySource, workflowSource]) {
+  assert.match(source, /closingIssuesReferences\(first: 100\)/);
+  assert.doesNotMatch(source, /closingIssuesReferences\.nodes\s*\.slice\(/);
+}
 assert.deepEqual(context.readiness.deterministic_blockers, []);
+assert.deepEqual(
+  analyzePullRequest(manyLinkedIssuesInput).deterministic_blockers,
+  [],
+);
+assert.ok(blockerCodes(analyzePullRequest({
+  ...manyLinkedIssuesInput,
+  linked_issue_count: manyLinkedIssues.length + 1,
+})).includes("too-many-closing-issues"));
 assert.ok(analyzePullRequest({ ...input, title: "Bad title" })
   .deterministic_blockers.some((item) => item.code === "invalid-title"));
 assert.ok(analyzePullRequest({ ...input, body: "" })
@@ -427,6 +470,35 @@ try {
     new RegExp(context.readiness.snapshot_sha256),
   );
 
+  const manyFixture = structuredClone(fixture);
+  manyFixture.repository.pullRequest.closingIssuesReferences = {
+    totalCount: manyLinkedIssues.length,
+    nodes: manyLinkedIssues.map((issue) => ({
+      repository: { nameWithOwner: issue.repository },
+      number: issue.number,
+      title: issue.title,
+      body: issue.body,
+      state: issue.state,
+      issueType: { name: issue.issue_type },
+      parent: issue.parent_number == null
+        ? null
+        : { number: issue.parent_number },
+      subIssues: {
+        totalCount: issue.sub_issue_count ?? 0,
+        nodes: (issue.sub_issues ?? []).map((subIssue) => ({
+          repository: { nameWithOwner: subIssue.repository },
+          number: subIssue.number,
+          state: subIssue.state,
+        })),
+      },
+    })),
+  };
+  fs.writeFileSync(fixtureFile, JSON.stringify(manyFixture));
+  const manyReadiness = analyzePullRequest(manyLinkedIssuesInput);
+  const manyResult = verify(manyReadiness.snapshot_sha256);
+  assert.equal(manyResult.status, 0, manyResult.stderr);
+  fs.writeFileSync(fixtureFile, JSON.stringify(fixture));
+
   const assertStale = (mutate) => {
     const staleFixture = structuredClone(fixture);
     mutate(staleFixture.repository.pullRequest);
diff --git a/.github/scripts/pr-readiness/verify.mjs b/.github/scripts/pr-readiness/verify.mjs
index 7d9e999..6c431c6 100644
--- a/.github/scripts/pr-readiness/verify.mjs
+++ b/.github/scripts/pr-readiness/verify.mjs
@@ -40,7 +40,7 @@ async function fetchPullRequest() {
                 body
                 baseRefOid
                 headRefOid
-                closingIssuesReferences(first: 20) {
+                closingIssuesReferences(first: 100) {
                   totalCount
                   nodes {
                     repository { nameWithOwner }
@@ -100,7 +100,6 @@ const data = await fetchPullRequest();
 const pullRequest = data.repository?.pullRequest;
 if (!pullRequest) throw new Error("Pull request was not found");
 const linkedIssues = pullRequest.closingIssuesReferences.nodes
-  .slice(0, 10)
   .map((issue) => ({
     repository: issue.repository.nameWithOwner,
     number: issue.number,
diff --git a/.github/workflows/codex-openai-review.yml b/.github/workflows/codex-openai-review.yml
index 3bd474a..c39f994 100644
--- a/.github/workflows/codex-openai-review.yml
+++ b/.github/workflows/codex-openai-review.yml
@@ -392,7 +392,7 @@ jobs:
                     pullRequest(number: $number) {
                       title
                       body
-                      closingIssuesReferences(first: 20) {
+                      closingIssuesReferences(first: 100) {
                         totalCount
                         nodes {
                           repository { nameWithOwner }
@@ -449,7 +449,6 @@ jobs:
                 linked_issue_count:
                   pullRequest.closingIssuesReferences.totalCount,
                 linked_issues: pullRequest.closingIssuesReferences.nodes
-                  .slice(0, 10)
                   .map((issue) => ({
                     repository: issue.repository.nameWithOwner,
                     number: issue.number,
diff --git a/README.md b/README.md
index b93f655..4082c8a 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,11 @@ linkage requirements:
 - The complete PR result follows the current Issue plan. Material deviations
   must be reflected in the Issue or disclosed and resolved in the PR.
 
+The reviewer preserves every native closing Issue returned by GitHub's maximum
+100-node GraphQL page. It fails closed when `totalCount` exceeds the collected
+nodes, rather than silently reviewing a truncated relationship set. Native
+sub-issue snapshots use the same 100-node fail-closed bound.
+
 Caller policy can add trusted organization-level constraints. Repository-owned
 title formats, Issue Types, sections, relationships, ownership rules,
 validation commands, platform requirements, and finding severity rules belong