fix(gateway): include export name in hook transform cache key (#13855)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: a9eea919b8
Co-authored-by: mcaxtr <7562095+mcaxtr@users.noreply.github.com>
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Reviewed-by: @mbelinky

src/gateway/hooks-mapping.test.ts

@@ -294,6 +294,72 @@ describe("hooks mapping", () => {
     }
   });
 
+  it("caches transform functions by module path and export name", async () => {
+    const configDir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-hooks-export-"));
+    const transformsRoot = path.join(configDir, "hooks", "transforms");
+    fs.mkdirSync(transformsRoot, { recursive: true });
+    const modPath = path.join(transformsRoot, "multi-export.mjs");
+    fs.writeFileSync(
+      modPath,
+      [
+        'export function transformA() { return { kind: "wake", text: "from-A" }; }',
+        'export function transformB() { return { kind: "wake", text: "from-B" }; }',
+      ].join("\n"),
+    );
+
+    const mappingsA = resolveHookMappings(
+      {
+        mappings: [
+          {
+            match: { path: "testA" },
+            action: "agent",
+            messageTemplate: "unused",
+            transform: { module: "multi-export.mjs", export: "transformA" },
+          },
+        ],
+      },
+      { configDir },
+    );
+
+    const mappingsB = resolveHookMappings(
+      {
+        mappings: [
+          {
+            match: { path: "testB" },
+            action: "agent",
+            messageTemplate: "unused",
+            transform: { module: "multi-export.mjs", export: "transformB" },
+          },
+        ],
+      },
+      { configDir },
+    );
+
+    const resultA = await applyHookMappings(mappingsA, {
+      payload: {},
+      headers: {},
+      url: new URL("http://127.0.0.1:18789/hooks/testA"),
+      path: "testA",
+    });
+
+    const resultB = await applyHookMappings(mappingsB, {
+      payload: {},
+      headers: {},
+      url: new URL("http://127.0.0.1:18789/hooks/testB"),
+      path: "testB",
+    });
+
+    expect(resultA?.ok).toBe(true);
+    if (resultA?.ok && resultA.action?.kind === "wake") {
+      expect(resultA.action.text).toBe("from-A");
+    }
+
+    expect(resultB?.ok).toBe(true);
+    if (resultB?.ok && resultB.action?.kind === "wake") {
+      expect(resultB.action.text).toBe("from-B");
+    }
+  });
+
   it("rejects missing message", async () => {
     const mappings = resolveHookMappings({
       mappings: [{ match: { path: "noop" }, action: "agent" }],