fix(pi): support Windows session paths (#3729)

refs #3726

Co-authored-by: akbash-bot <300245827+akbash-bot@users.noreply.github.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/integration/assets/herdr-agent-state.test.ts b/src/integration/assets/herdr-agent-state.test.ts
index 7720e088..48cc8708 100644
--- a/src/integration/assets/herdr-agent-state.test.ts
+++ b/src/integration/assets/herdr-agent-state.test.ts
@@ -240,6 +240,28 @@ test("OMP accepts POSIX and Windows session paths", async () => {
   expect(isAbsoluteSessionPath("relative/omp-session.jsonl")).toBe(false);
 });
 
+test("Pi reports a Windows session path", async () => {
+  const requests = await startRecordingServer("pi-windows-session-path");
+  const { handlers, pi } = createExtensionHarness();
+  const { default: install } = await importFresh("./pi/herdr-agent-state.ts");
+  install(pi);
+
+  const sessionPath = "C:\\Users\\User\\.pi\\agent\\sessions\\pi-session.jsonl";
+  await handlers.get("session_start")?.(
+    { reason: "startup" },
+    {
+      ...piContext(() => true),
+      sessionManager: {
+        getSessionFile: () => sessionPath,
+        getSessionId: () => "pi-session",
+      },
+    },
+  );
+  await waitFor(() => requests.length === 2);
+
+  expect(requests.map(requestSessionPath)).toEqual([sessionPath, sessionPath]);
+});
+
 test("Pi reports idle only after the agent settles", async () => {
   const requests = await startRecordingServer("pi-settled");
   const { handlers, pi } = createExtensionHarness();
@@ -617,6 +639,13 @@ function requestState(request: unknown): unknown {
   return request.params.state;
 }
 
+function requestSessionPath(request: unknown): unknown {
+  if (!isRecord(request) || !isRecord(request.params)) {
+    return undefined;
+  }
+  return request.params.agent_session_path;
+}
+
 function isRecord(value: unknown): value is Record<string, unknown> {
   return typeof value === "object" && value !== null;
 }