chore: remove twilio and expand pi cli detection

src/agents/pi.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it } from "vitest";
+
+import { piSpec } from "./pi.js";
+
+describe("piSpec.isInvocation", () => {
+  it("detects pi binary", () => {
+    expect(piSpec.isInvocation(["/usr/local/bin/pi"])).toBe(true);
+  });
+
+  it("detects tau binary", () => {
+    expect(piSpec.isInvocation(["/opt/tau"])).toBe(true);
+  });
+
+  it("detects node entry pointing at coding-agent cli", () => {
+    expect(
+      piSpec.isInvocation([
+        "node",
+        "/Users/me/Projects/pi-mono/packages/coding-agent/dist/cli.js",
+      ]),
+    ).toBe(true);
+  });
+
+  it("rejects unrelated node scripts", () => {
+    expect(piSpec.isInvocation(["node", "/tmp/script.js"])).toBe(false);
+  });
+});