feat: add client side skills (#1320)

Co-authored-by: Letta Code <noreply@letta.com>

src/tests/headless/client-skills-wiring.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, test } from "bun:test";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+
+describe("headless client skills wiring", () => {
+  test("pre-load-skills resolves skill paths from client-skills helper", () => {
+    const headlessPath = fileURLToPath(
+      new URL("../../headless.ts", import.meta.url),
+    );
+    const source = readFileSync(headlessPath, "utf-8");
+
+    expect(source).toContain("buildClientSkillsPayload({");
+    expect(source).toContain(
+      "const { skillPathById } = await buildClientSkillsPayload",
+    );
+    expect(source).toContain("const skillPath = skillPathById[skillId]");
+    expect(source).not.toContain("sharedReminderState.skillPathById");
+  });
+});