feat: add Kitty-aware completion notifications

pi-notify/tests/messages.test.ts

@@ -0,0 +1,38 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+import { extractMessageText, truncateText } from "../src/messages.ts";
+
+describe("messages", () => {
+  it("extracts the latest text message for a role", () => {
+    const messages = [
+      { role: "user", content: "first user" },
+      { role: "assistant", content: [{ type: "text", text: "first assistant" }] },
+      { role: "user", content: [{ type: "text", text: "latest\nuser" }] },
+    ];
+
+    assert.equal(extractMessageText(messages, "user"), "latest user");
+    assert.equal(extractMessageText(messages, "assistant"), "first assistant");
+  });
+
+  it("ignores non-text content blocks", () => {
+    const messages = [
+      {
+        role: "assistant",
+        content: [
+          { type: "image", text: "ignore me" },
+          { type: "text", text: "keep me" },
+        ],
+      },
+    ];
+
+    assert.equal(extractMessageText(messages, "assistant"), "keep me");
+  });
+
+  it("truncates by unicode code points", () => {
+    assert.equal(truncateText("hello", 10), "hello");
+    assert.equal(truncateText("hello", 4), "hel…");
+    assert.equal(truncateText("🤖abc", 3), "🤖a…");
+    assert.equal(truncateText("hello", 1), "…");
+    assert.equal(truncateText("hello", 0), "");
+  });
+});