feat(agents): add available-skills resolution with tests

src/agents/builtin-agents/available-skills.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, test } from "bun:test"
+
+import { buildAvailableSkills } from "./available-skills"
+
+describe("buildAvailableSkills", () => {
+  test("includes team-mode when team mode is enabled", () => {
+    // given
+    const discoveredSkills = []
+
+    // when
+    const availableSkills = buildAvailableSkills(discoveredSkills, undefined, undefined, true)
+
+    // then
+    expect(availableSkills.some((skill) => skill.name === "team-mode")).toBe(true)
+  })
+
+  test("excludes team-mode when team mode is disabled", () => {
+    // given
+    const discoveredSkills = []
+
+    // when
+    const availableSkills = buildAvailableSkills(discoveredSkills, undefined, undefined, false)
+
+    // then
+    expect(availableSkills.some((skill) => skill.name === "team-mode")).toBe(false)
+  })
+})