feat: select subagent runner from config

src/runner.test.ts

@@ -0,0 +1,70 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { createConfiguredRunSingleTask } from "./runner.ts";
+
+function makeResult(finalText: string) {
+  return {
+    runId: "run-1",
+    agent: "scout",
+    agentSource: "builtin" as const,
+    task: "inspect auth",
+    exitCode: 0,
+    finalText,
+  };
+}
+
+test("createConfiguredRunSingleTask uses process runner when config says process", async () => {
+  const calls: string[] = [];
+  const runSingleTask = createConfiguredRunSingleTask({
+    loadConfig: () => ({ runner: "process" }),
+    processRunner: async () => {
+      calls.push("process");
+      return makeResult("process");
+    },
+    tmuxRunner: async () => {
+      calls.push("tmux");
+      return makeResult("tmux");
+    },
+  });
+
+  const result = await runSingleTask({ cwd: "/repo", meta: { task: "inspect auth" } as any });
+
+  assert.equal(result.finalText, "process");
+  assert.deepEqual(calls, ["process"]);
+});
+
+test("createConfiguredRunSingleTask uses tmux runner when config says tmux", async () => {
+  const calls: string[] = [];
+  const runSingleTask = createConfiguredRunSingleTask({
+    loadConfig: () => ({ runner: "tmux" }),
+    processRunner: async () => {
+      calls.push("process");
+      return makeResult("process");
+    },
+    tmuxRunner: async () => {
+      calls.push("tmux");
+      return makeResult("tmux");
+    },
+  });
+
+  const result = await runSingleTask({ cwd: "/repo", meta: { task: "inspect auth" } as any });
+
+  assert.equal(result.finalText, "tmux");
+  assert.deepEqual(calls, ["tmux"]);
+});
+
+test("createConfiguredRunSingleTask passes task cwd into config loader", async () => {
+  let cwdSeen = "";
+  const runSingleTask = createConfiguredRunSingleTask({
+    loadConfig: (cwd) => {
+      cwdSeen = cwd;
+      return { runner: "process" };
+    },
+    processRunner: async () => makeResult("process"),
+    tmuxRunner: async () => makeResult("tmux"),
+  });
+
+  await runSingleTask({ cwd: "/repo/worktree", meta: { task: "inspect auth" } as any });
+
+  assert.equal(cwdSeen, "/repo/worktree");
+});