feat: add download installs for skills

src/agents/skills.buildworkspaceskillstatus.test.ts

@@ -109,4 +109,33 @@ describe("buildWorkspaceSkillStatus", () => {
       }
     }
   });
+
+  it("filters install options by OS", async () => {
+    const workspaceDir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-"));
+    const skillDir = path.join(workspaceDir, "skills", "install-skill");
+
+    await writeSkill({
+      dir: skillDir,
+      name: "install-skill",
+      description: "OS-specific installs",
+      metadata:
+        '{"clawdbot":{"requires":{"bins":["missing-bin"]},"install":[{"id":"mac","kind":"download","os":["darwin"],"url":"https://example.com/mac.tar.bz2"},{"id":"linux","kind":"download","os":["linux"],"url":"https://example.com/linux.tar.bz2"},{"id":"win","kind":"download","os":["win32"],"url":"https://example.com/win.tar.bz2"}]}}',
+    });
+
+    const report = buildWorkspaceSkillStatus(workspaceDir, {
+      managedSkillsDir: path.join(workspaceDir, ".managed"),
+    });
+    const skill = report.skills.find((entry) => entry.name === "install-skill");
+
+    expect(skill).toBeDefined();
+    if (process.platform === "darwin") {
+      expect(skill?.install.map((opt) => opt.id)).toEqual(["mac"]);
+    } else if (process.platform === "linux") {
+      expect(skill?.install.map((opt) => opt.id)).toEqual(["linux"]);
+    } else if (process.platform === "win32") {
+      expect(skill?.install.map((opt) => opt.id)).toEqual(["win"]);
+    } else {
+      expect(skill?.install).toEqual([]);
+    }
+  });
 });