diff --git a/packages/adapters/openclaw-gateway/src/server/execute.test.ts b/packages/adapters/openclaw-gateway/src/server/execute.test.ts
new file mode 100644
index 00000000..0b18108c
--- /dev/null
+++ b/packages/adapters/openclaw-gateway/src/server/execute.test.ts
@@ -0,0 +1,52 @@
+import { describe, expect, it } from "vitest";
+import { resolveSessionKey } from "./execute.js";
+
+describe("resolveSessionKey", () => {
+  it("prefixes run-scoped session keys with the configured agent", () => {
+    expect(
+      resolveSessionKey({
+        strategy: "run",
+        configuredSessionKey: null,
+        agentId: "meridian",
+        runId: "run-123",
+        issueId: null,
+      }),
+    ).toBe("agent:meridian:paperclip:run:run-123");
+  });
+
+  it("prefixes issue-scoped session keys with the configured agent", () => {
+    expect(
+      resolveSessionKey({
+        strategy: "issue",
+        configuredSessionKey: null,
+        agentId: "meridian",
+        runId: "run-123",
+        issueId: "issue-456",
+      }),
+    ).toBe("agent:meridian:paperclip:issue:issue-456");
+  });
+
+  it("prefixes fixed session keys with the configured agent", () => {
+    expect(
+      resolveSessionKey({
+        strategy: "fixed",
+        configuredSessionKey: "paperclip",
+        agentId: "meridian",
+        runId: "run-123",
+        issueId: null,
+      }),
+    ).toBe("agent:meridian:paperclip");
+  });
+
+  it("does not double-prefix an already-routed session key", () => {
+    expect(
+      resolveSessionKey({
+        strategy: "fixed",
+        configuredSessionKey: "agent:meridian:paperclip",
+        agentId: "meridian",
+        runId: "run-123",
+        issueId: null,
+      }),
+    ).toBe("agent:meridian:paperclip");
+  });
+});
diff --git a/packages/adapters/openclaw-gateway/src/server/execute.ts b/packages/adapters/openclaw-gateway/src/server/execute.ts
index bcb4e06b..02235f39 100644
--- a/packages/adapters/openclaw-gateway/src/server/execute.ts
+++ b/packages/adapters/openclaw-gateway/src/server/execute.ts
@@ -133,16 +133,26 @@ function normalizeSessionKeyStrategy(value: unknown): SessionKeyStrategy {
   return "issue";
 }
 
-function resolveSessionKey(input: {
+function prefixSessionKeyForAgent(sessionKey: string, agentId: string | null): string {
+  if (!agentId || sessionKey.startsWith("agent:")) return sessionKey;
+  return `agent:${agentId}:${sessionKey}`;
+}
+
+export function resolveSessionKey(input: {
   strategy: SessionKeyStrategy;
   configuredSessionKey: string | null;
+  agentId: string | null;
   runId: string;
   issueId: string | null;
 }): string {
   const fallback = input.configuredSessionKey ?? "paperclip";
-  if (input.strategy === "run") return `paperclip:run:${input.runId}`;
-  if (input.strategy === "issue" && input.issueId) return `paperclip:issue:${input.issueId}`;
-  return fallback;
+  if (input.strategy === "run") {
+    return prefixSessionKeyForAgent(`paperclip:run:${input.runId}`, input.agentId);
+  }
+  if (input.strategy === "issue" && input.issueId) {
+    return prefixSessionKeyForAgent(`paperclip:issue:${input.issueId}`, input.agentId);
+  }
+  return prefixSessionKeyForAgent(fallback, input.agentId);
 }
 
 function isLoopbackHost(hostname: string): boolean {
@@ -1106,6 +1116,7 @@ export async function execute(ctx: AdapterExecutionContext): Promise<AdapterExec
   const sessionKey = resolveSessionKey({
     strategy: sessionKeyStrategy,
     configuredSessionKey,
+    agentId: nonEmpty(ctx.config.agentId),
     runId: ctx.runId,
     issueId: wakePayload.issueId,
   });