diff --git a/packages/plugins/sdk/src/protocol.ts b/packages/plugins/sdk/src/protocol.ts
index ad11522d933..c19db622319 100644
--- a/packages/plugins/sdk/src/protocol.ts
+++ b/packages/plugins/sdk/src/protocol.ts
@@ -1496,6 +1496,8 @@ export interface WorkerToHostMethods {
        */
       actorUserId?: string;
       reason?: string | null;
+      /** Explicit checkbox selection for request_checkbox_confirmation accepts. */
+      selectedOptionIds?: string[];
     },
     result: { interaction: IssueThreadInteraction; applied: boolean },
   ];
diff --git a/packages/plugins/sdk/src/testing.ts b/packages/plugins/sdk/src/testing.ts
index 8894bda8901..e02c335b903 100644
--- a/packages/plugins/sdk/src/testing.ts
+++ b/packages/plugins/sdk/src/testing.ts
@@ -1810,6 +1810,16 @@ export function createTestHarness(options: TestHarnessOptions): TestHarness {
         const resolved: IssueThreadInteraction = {
           ...current,
           status: input.action === "accept" ? "accepted" : "rejected",
+          ...(input.action === "accept"
+            && current.kind === "request_checkbox_confirmation"
+            && input.selectedOptionIds !== undefined
+            ? {
+              result: {
+                outcome: "accepted",
+                selectedOptionIds: input.selectedOptionIds,
+              },
+            }
+            : {}),
           updatedAt: new Date(),
         } as IssueThreadInteraction;
         const index = list.indexOf(current);
diff --git a/packages/plugins/sdk/src/types.ts b/packages/plugins/sdk/src/types.ts
index 55e34cbddb3..c2ab3931aac 100644
--- a/packages/plugins/sdk/src/types.ts
+++ b/packages/plugins/sdk/src/types.ts
@@ -1530,7 +1530,13 @@ export interface PluginIssuesClient {
   respondInteraction(
     issueId: string,
     interactionId: string,
-    input: { action: "accept" | "reject"; actorUserId?: string; reason?: string | null },
+    input: {
+      action: "accept" | "reject";
+      actorUserId?: string;
+      reason?: string | null;
+      /** Explicit checkbox selection; omit to accept the interaction defaults. */
+      selectedOptionIds?: string[];
+    },
     companyId: string,
   ): Promise<{ interaction: IssueThreadInteraction; applied: boolean }>;
   /** List attachment metadata for an issue. Requires `issue.attachments.read`. */
diff --git a/packages/plugins/sdk/src/worker-rpc-host.ts b/packages/plugins/sdk/src/worker-rpc-host.ts
index 72dcf9238ad..e5c0e4fc8b6 100644
--- a/packages/plugins/sdk/src/worker-rpc-host.ts
+++ b/packages/plugins/sdk/src/worker-rpc-host.ts
@@ -993,7 +993,12 @@ export function startWorkerRpcHost(options: WorkerRpcHostOptions): WorkerRpcHost
         async respondInteraction(
           issueId: string,
           interactionId: string,
-          input: { action: "accept" | "reject"; actorUserId?: string; reason?: string | null },
+          input: {
+            action: "accept" | "reject";
+            actorUserId?: string;
+            reason?: string | null;
+            selectedOptionIds?: string[];
+          },
           companyId: string,
         ) {
           return callHost("issues.respondInteraction", {
@@ -1003,6 +1008,7 @@ export function startWorkerRpcHost(options: WorkerRpcHostOptions): WorkerRpcHost
             action: input.action,
             actorUserId: input.actorUserId,
             reason: input.reason,
+            selectedOptionIds: input.selectedOptionIds,
           });
         },
 
diff --git a/packages/plugins/sdk/tests/host-client-factory.test.ts b/packages/plugins/sdk/tests/host-client-factory.test.ts
index 2c87650af5b..59c8ef12ed9 100644
--- a/packages/plugins/sdk/tests/host-client-factory.test.ts
+++ b/packages/plugins/sdk/tests/host-client-factory.test.ts
@@ -337,10 +337,22 @@ describe("createHostClientHandlers capability gating for LOOA-641 methods", () =
     });
     await expect(
       handlers["issues.respondInteraction"]({
-        issueId: "issue-a", interactionId: "int-a", companyId: "company-a", action: "accept", actorUserId: "user-a",
+        issueId: "issue-a",
+        interactionId: "int-a",
+        companyId: "company-a",
+        action: "accept",
+        actorUserId: "user-a",
+        selectedOptionIds: ["spike-b"],
       }, context),
     ).resolves.toEqual({ interaction: { id: "i" }, applied: true });
-    expect(respondInteraction).toHaveBeenCalledOnce();
+    expect(respondInteraction).toHaveBeenCalledWith({
+      issueId: "issue-a",
+      interactionId: "int-a",
+      companyId: "company-a",
+      action: "accept",
+      actorUserId: "user-a",
+      selectedOptionIds: ["spike-b"],
+    });
   });
 
   it("denies approvals.decide without approvals.respond", async () => {
diff --git a/server/src/__tests__/plugin-orchestration-apis.test.ts b/server/src/__tests__/plugin-orchestration-apis.test.ts
index 1f3f2e06581..968c01ccfe2 100644
--- a/server/src/__tests__/plugin-orchestration-apis.test.ts
+++ b/server/src/__tests__/plugin-orchestration-apis.test.ts
@@ -991,6 +991,51 @@ describeEmbeddedPostgres("plugin orchestration APIs", () => {
     expect(row?.status).toBe("accepted");
   });
 
+  it("respondInteraction forwards an explicit checkbox selection", async () => {
+    const { companyId } = await seedCompanyAndAgent();
+    const operatorUserId = randomUUID();
+    await db.insert(companyMemberships).values({
+      companyId, principalType: "user", principalId: operatorUserId, status: "active", membershipRole: "operator",
+    });
+    const issueId = randomUUID();
+    await db.insert(issues).values({
+      id: issueId, companyId, title: "Choose campaigns", status: "in_review", priority: "medium",
+    });
+    const interactionId = await seedInteraction(companyId, issueId, {
+      kind: "request_checkbox_confirmation",
+      payload: {
+        version: 1,
+        prompt: "Which spikes should become campaigns?",
+        options: [
+          { id: "spike-a", label: "Spike A" },
+          { id: "spike-b", label: "Spike B" },
+        ],
+        defaultSelectedOptionIds: [],
+        minSelected: 0,
+        maxSelected: 2,
+      } as never,
+    });
+    const services = buildHostServices(db, "plugin-record-id", "paperclip.gateway", createEventBusStub());
+
+    const result = await services.issues.respondInteraction({
+      issueId,
+      interactionId,
+      companyId,
+      action: "accept",
+      actorUserId: operatorUserId,
+      selectedOptionIds: ["spike-b"],
+    });
+
+    expect(result.applied).toBe(true);
+    expect(result.interaction).toMatchObject({
+      status: "accepted",
+      result: {
+        outcome: "accepted",
+        selectedOptionIds: ["spike-b"],
+      },
+    });
+  });
+
   it("respondInteraction converges (applied:false) when the interaction is already resolved", async () => {
     const { companyId, agentId } = await seedCompanyAndAgent();
     const humanUserId = randomUUID();
diff --git a/server/src/services/plugin-host-services.ts b/server/src/services/plugin-host-services.ts
index 0c2d10e2e26..b1753cfd87f 100644
--- a/server/src/services/plugin-host-services.ts
+++ b/server/src/services/plugin-host-services.ts
@@ -2289,7 +2289,9 @@ export function buildHostServices(
           const result = await interactions.acceptInteraction(
             { id: issue.id, companyId, projectId: issue.projectId ?? null, goalId: issue.goalId ?? null },
             params.interactionId,
-            {},
+            params.selectedOptionIds === undefined
+              ? {}
+              : { selectedOptionIds: params.selectedOptionIds },
             actor,
           );
           resolved = result.interaction as typeof current;