feat: add exec pathPrepend config

src/agents/bash-tools.test.ts

@@ -1,3 +1,5 @@
+import path from "node:path";
+
 import { afterEach, beforeEach, describe, expect, it } from "vitest";
 import { peekSystemEvents, resetSystemEventsForTest } from "../infra/system-events.js";
 import { getFinishedSession, resetProcessRegistryForTests } from "./bash-process-registry.js";
@@ -275,6 +277,34 @@ describe("exec notifyOnExit", () => {
   });
 });
 
+describe("exec PATH handling", () => {
+  const originalPath = process.env.PATH;
+  const originalShell = process.env.SHELL;
+
+  beforeEach(() => {
+    if (!isWin) process.env.SHELL = "/bin/bash";
+  });
+
+  afterEach(() => {
+    process.env.PATH = originalPath;
+    if (!isWin) process.env.SHELL = originalShell;
+  });
+
+  it("prepends configured path entries", async () => {
+    const basePath = isWin ? "C:\\Windows\\System32" : "/usr/bin";
+    const prepend = isWin ? ["C:\\custom\\bin", "C:\\oss\\bin"] : ["/custom/bin", "/opt/oss/bin"];
+    process.env.PATH = basePath;
+
+    const tool = createExecTool({ pathPrepend: prepend });
+    const result = await tool.execute("call1", {
+      command: isWin ? "Write-Output $env:PATH" : "echo $PATH",
+    });
+
+    const text = normalizeText(result.content.find((c) => c.type === "text")?.text);
+    expect(text).toBe([...prepend, basePath].join(path.delimiter));
+  });
+});
+
 describe("buildDockerExecArgs", () => {
   it("prepends custom PATH after login shell sourcing to preserve both custom and system tools", () => {
     const args = buildDockerExecArgs({