Rank slash command autocomplete matches

packages/app/src/utils/agent-command-autocomplete.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from "vitest";
+
+import { filterAndRankCommandAutocompleteEntries } from "./agent-command-autocomplete";
+
+describe("filterAndRankCommandAutocompleteEntries", () => {
+  const entries = [
+    { source: "provider" as const, command: { name: "paseo-committee" } },
+    { source: "provider" as const, command: { name: "commit" } },
+    { source: "provider" as const, command: { name: "paseo-advisor" } },
+  ];
+
+  it("ranks command-name prefixes above later word-boundary partial matches", () => {
+    const result = filterAndRankCommandAutocompleteEntries(entries, "comm");
+
+    expect(result.map((entry) => entry.command.name)).toEqual(["commit", "paseo-committee"]);
+  });
+
+  it("matches client command aliases", () => {
+    const result = filterAndRankCommandAutocompleteEntries(
+      [
+        { source: "client" as const, command: { name: "exit", aliases: ["quit", "q"] } },
+        { source: "client" as const, command: { name: "clear", aliases: ["new"] } },
+      ],
+      "q",
+    );
+
+    expect(result.map((entry) => entry.command.name)).toEqual(["exit"]);
+  });
+});