diff --git a/src/settings/agent-actions.ts b/src/settings/agent-actions.ts
index 17624d0eaa..0eba0c53af 100644
--- a/src/settings/agent-actions.ts
+++ b/src/settings/agent-actions.ts
@@ -751,6 +751,10 @@ export function planAgentMaintenanceActions(input: AgentActionPlanInput): Planne
         closeReasons: ["over the per-contributor open-item cap"],
         closeComment: sanitizePublicComment(contributorCapCloseMessage(authorLogin, openCount, cap, itemKind, scope)),
         closeKind: "contributor_cap",
+        // Pin like blacklist/review_nag/copycat/screenshot_table above (#2452): without this an auto_with_approval
+        // stage persists params.expectedHeadSha as undefined, so decidePendingAgentAction's isUnpinnedRatifyingAction
+        // guard unconditionally rejects the maintainer's accept before the close ever executes.
+        ...(input.pr.headSha ? { expectedHeadSha: input.pr.headSha } : {}),
       });
     }
     if (acting("close") && label !== null) actions.push({ actionClass: "label", autonomyClass: "close", closeKind: "contributor_cap", requiresApproval: approval("close"), reason: "over the per-contributor open-item cap", label, labelOp: "add" });
diff --git a/test/unit/agent-actions.test.ts b/test/unit/agent-actions.test.ts
index 2c2db57ec3..be5debb3b6 100644
--- a/test/unit/agent-actions.test.ts
+++ b/test/unit/agent-actions.test.ts
@@ -2052,6 +2052,16 @@ describe("per-contributor open-item cap short-circuit (#2270)", () => {
     expect(plan[1]).toMatchObject({ actionClass: "label", label: DEFAULT_CONTRIBUTOR_CAP_LABEL, labelOp: "add", closeKind: "contributor_cap" });
   });
 
+  it("pins the contributor_cap close to the reviewed head, mirroring blacklist/review_nag/copycat/screenshot_table (regression: was previously unpinned, which made decidePendingAgentAction reject every auto_with_approval accept via isUnpinnedRatifyingAction)", () => {
+    const plan = planAgentMaintenanceActions(overCap({ pr: { labels: [], headSha: "h-reviewed" } }));
+    expect(plan.find((a) => a.actionClass === "close")).toMatchObject({ closeKind: "contributor_cap", expectedHeadSha: "h-reviewed" });
+  });
+
+  it("omits expectedHeadSha on the contributor_cap close when the PR record has no headSha (defensive fallback)", () => {
+    const plan = planAgentMaintenanceActions(overCap());
+    expect(plan.find((a) => a.actionClass === "close")?.expectedHeadSha).toBeUndefined();
+  });
+
   it("interpolates the (public) login/count/cap into the close comment — unlike blacklist's static-only comment", () => {
     const plan = planAgentMaintenanceActions(overCap());
     expect(plan[0]?.closeComment).toContain("@farmer99");